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Bay control unit configuration description (Type: DVEZ)

1. Parameter name Title Dim Min Max Default Frequency difference for automatic synchro checking mode SYN25_ChkFrDA_FPar_ hii SynCheck uz 002 fos 0 02 Frequency difference for automatic synchro switching mode SYN25 SwFrDA FPar FrDiff SynSW Auto Hz 0 10 1 00 0 2 Frequency difference for manual synchro checking mode SYN25 ChkFrDM FPar Mo SynCheck ooz fos 002 Frequency difference for manual synchro switching mode SYN25_SwFrDM_FPar_ FrDiff SynSW Man Hz 0 10 1 00 0 2 Table 27 The floating point parameters of the synchro check synchro switch function Timer parameters Parameter name Title Unit Min Max Step Default Breaker operating time at closing SYN25 CBTrav TPar Breaker Time msec 0 500 1 80 Impulse duration for close command SYN25 SwPu_TPar_ Close Pulse msec 10 60000 1 1000 Maximum allowed switching time SYN25 MaxSw TPar Max Switch Time msec 100 60000 1 2000 Table 28 The timer parameters of the synchro check synchro switch function DVEZ CONFIG V1 1 doc 20 71 DVEZ Bay control unit configurations description 1 3 1 6 Auto reclose protection function REC79HV The HV automatic reclosing function for high voltage networks can realize up to four shots of reclosing The dead time can be set individually for each reclosing and separately for single phase faults and for multi phase faults The
2. Table 31 The timer parameters of the rate of auto reclose function DVEZ_CONFIG_V1 1 doc 24 71 DVEZ Bay control unit configurations description Boolean parameters Parameter name Title Default Explanation Enable CB state monitoring for Not REC79 CBState BPar CB State Monitoring 0 Ready state REC79 3PhRecBIR BPar Disable 3Ph Rec 0 Disable three phase reclosing REC79_Acc1_BPar_ Accelerate 1 Trip 0 oer HIP Cont ele Enn REC79 Acc2 BPar Accelerate 2 Trip 0 xo Pip EON staring REC79_Acc3_BPar_ Accelerate 3 Trip 0 ea mp gommand at staning REC79_Acc4_BPar_ Accelerate 4 Trip 0 MG pip gommand dt starting REC79 Acc5 BPar Accelerate FinTrip 0 Accelerate final trip command Table 32 The boolean parameters of the rate of auto reclose function DVEZ CONFIG V1 1 doc 25 71 DVEZ Bay control unit configurations description 1 3 1 7 Auto reclose protection REC79MV The MV automatic reclosing function can realize up to four shots of reclosing for medium voltage networks The dead time can be set individually for each reclosing and separately for earth faults and for multi phase faults All shots are of three phase reclosing The starting signal of the cycles can be generated by any combination of the protection functions or external signals of the binary inputs The automatic reclosing function is triggered if as a consequence of a fault a protection function g
3. Using this channel the pushbuttons on the front panel of the device can be assigned to close or open the circuit breaker These are the Local commands DVEZ_CONFIG_V1 1 doc 53 71 DVEZ Bay control unit configurations description 1 3 2 2 Disconnector control function DisConn The Disconnector control function block can be used to integrate the disconnector control of the EuroProt device into the station control system and to apply active scheme screens of the local LCD of the device The Disconnector control function block receives remote commands from the SCADA system and local commands from the local LCD of the device performs the prescribed checking and transmits the commands to the disconnector It processes the status signals received from the disconnector and offers them to the status display of the local LCD and to the SCADA system Main features e Local LCD of the device and Remote SCADA operation modes can be enabled or disabled individually e Interlocking functions can be programmed by the user applying the inputs EnaOff enabled trip command and EnaOn enabled close command using the graphic equation editor e Programmed conditions can be used to temporarily disable the operation of the function block using the graphic equation editor e The function block supports the control models prescribed by the IEC 61850 standard e All necessary timing tasks are performed within the function blo
4. Parameter name Title Selection range Default Parameter for activation DRE Oper EPar Operation Off On Off Table 101 The enumerated parameter of the disturbance recorder function Timer parameters Parameter name Title Unit Min Max Step Default Pre fault time DRE PreFault TPar PreFault msec 100 1000 1 200 Post fault time DRE_PostFault_TPar_ PostFault msec 100 1000 1 200 Overall fault time limit DRE_MaxFault_TPar_ MaxFault msec 500 10000 1 1000 Table 102 The timer parameters of the disturbance recorder function DVEZ_CONFIG_V1 1 doc 70 71 DVEZ Bay control unit configurations description 1 3 5 Event recorder The events of the device and those of the protection functions are recorded with a time stamp of 1 ms time resolution This information with indication of the generating function can be checked on the touch screen of the device in the Events page or using an Internet browser of a connected computer The possible events depend on the required function of the bay control unit 1 4 LED assignment On the front panel of the device there are User LED s with the Changeable LED description label See the document Quick start guide to the devices of the EuroProt product line Some LED s are factory assigned some are free to be defined by the user DVEZ_CONFIG_V1 1 doc 71 71
5. Dead time setting for the first reclosing cycle for line to line fault REC79 PhDT1 TPar 1 Dead Time Ph msec 0 100000 10 500 Dead time setting for the second reclosing cycle for line to line fault REC79 PhDT2 TPar_ 2 Dead Time Ph msec 10 100000 10 600 Dead time setting for the third reclosing cycle for line to line fault REC79 PhDT3 TPar_ 3 Dead Time Ph msec 10 100000 10 700 Dead time setting for the fourth reclosing cycle for line to line fault REC79 PhDT4 TPar_ 4 Dead Time Ph msec 10 100000 10 800 Dead time setting for the first reclosing cycle for earth fault REC79 EFDT1 TPar 1 Dead Time EF msec 0 100000 10 1000 Dead time setting for the second reclosing cycle for earth fault REC79 EF DT2 TPar 2 Dead Time EF msec 10 100000 10 2000 Dead time setting for the third reclosing cycle for earth fault REC79 EF DT3 TPar 3 Dead Time EF msec 10 100000 10 3000 Dead time setting for the fourth reclosing cycle for earth fault REC79 EF DT4 TPar 4 Dead Time EF msec 10 100000 10 4000 Reclaim time setting REC79 Rec TPar Reclaim Time msec 100 100000 10 2000 Impulse duration setting for the CLOSE command REC79 Close TPar_ Close Command Time msec 10 10000 10 100 Setting of the dynamic blocking time REC79 DynBIR TPar Dynamic Blocking Time msec 10 100000 10 1500 Setting of the blocking time after manual close command REC79 MC TPar_ Block after Man Close msec 0 100000 10 1000
6. Table 45 The float point parameter of the under frequency protection function Timer parameter Parameter name Title Unit Min Max Step Default Time delay TUF81 Del TPar Time Delay ms 100 60000 1 200 Table 46 The timer parameter of the under frequency protection function DVEZ_CONFIG_V1 1 doc 30 71 DVEZ Bay control unit configurations description 1 3 1 10 Rate of change of frequency protection function FRC81 The deviation of the frequency from the rated system frequency indicates unbalance between the generated power and the load demand If the available generation is large compared to the consumption by the load connected to the power system then the system frequency is above the rated value and if it is small the frequency is below the rated value If the unbalance is large then the frequency changes rapidly The rate of change of frequency protection function is usually applied to reset the balance between generation and consumption to control the system frequency Another possible application is the detection of unintended island operation of distributed generation and some consumers In the island there is low probability that the power generated is the same as consumption accordingly the detection of a high rate of change of frequency can be an indication of island operation Accurate frequency measurement is also the criterion for the synchro switch function The
7. The configured functions are drawn symbolically in the Figure below Measured values U I P Q E f cos Recording features gt Event Recording gt Disturbance Recording Figure I Implemented protection and control functions DVEZ CONFIG V1 1 doc 6 71 DVEZ Bay control unit configurations description 1 1 2 Measurement functions Based on the hardware inputs the measurements listed in Table below are available Measurement functions Current 11 12 13 lo Voltage U1 U2 U3 U12 U23 U31 Uo Useq and frequency Power P Q S pf and Energy E E Eq Eq Circuit breaker wear Supervised trip contacts TCS If the HW permits then basic Table 2 The measurement functions of the El E2 BCU configuration DVEZ_CONFIG_V1 1 doc 7 71 DVEZ Bay control unit configurations description 1 1 3 Hardware configuration The minimum number of inputs and outputs are listed in the Table below Hardware configuration Mounting Panel instrument case Current inputs 4th channel can be sensitive Voltage inputs Digital inputs Digital outputs Fast trip outputs Temperature monitoring RTDs 38 49T Table 3 The basic hardware configuration of the DVEZ configurations The basic module arrangement of the DVEZ configurations are shown below Slot A Slot B Slot C Slot D Slot E Slot F Slot G Slot H Slot I Slot J Slot K Slot L Slot M Slot N Slot O S
8. i eats Bay control unit configuration description Type DVEZ DVEZ Bay control unit configurations description User s manual version information Version Date Modification Compiled by V1 0 First internal version Toth V1 1 12 05 2015 Minor correction Toth DVEZ_CONFIG_V1 1 doc 2 71 DVEZ Bay control unit configurations description CONTENTS 1 Configuration description ss 4 dl Appeal gs 4 1 1 1 Gonfiguratlons uisn nrnsersnnusnnlaruivismeddndivaifb rskesrnderunnek den 4 1 1 2 Measurement functions 7 1 1 3 Hardware configuration inienn netan ien aE Ean ES 8 1 1 4 The applied hardware modules rrrnrrnnnrrnvrnnnnrnvrnnnnnnvrnnnrrnvrnnnrrnrrnnnrrnvrnnnrrnrrnnsernn 9 12 Meeting the deviCce 2eememmmiaianzazonmmmyeryatamsmtmsmrenamesamts termes ts te 10 1 3 Software configuration iii 11 1 3 1 PFOLECHOMMUMCUONS iis cies neers nent nn Rien 11 1 3 1 1 Line thermal protection function TTR49L 12 1 3 1 2 Definite time overvoltage protection function TOV59 rrrrvrrvvrrnvnrnvnrnvnrnrnvnrrvvnrnee 15 1 3 1 3 Definite time undervoltage protection function TUV27 renrrnvnnnvnnnvnrnenrnenvnrrvvnrnnne 16 1 3 1 4 Residual definite time overvoltage protection function TOV59N sses 17 1 3 1 5 Synchrocheck function SYN25 ins 18 1 3 1 6 Auto reclose protection function REC79HV ss 21 1 3 1 7 Auto reclose protection REC79M
9. 1 1000 Time overbridging the transient state of the tap changer status signals ATCC_MidPos_TPar Position Filter msec 1000 30000 1 3000 Select before operate timeout according to IEC 61850 ATCC_SBOTimeout_TPar_ SBO Timeout msec 1000 20000 1 5000 Table 56 The timer parameters of the automatic tap changer controller function DVEZ_CONFIG_V1 1 doc 38 71 DVEZ Bay control unit configurations description Float point parameters Parameter name Title Unit Min Max Digits Default Factor for fine tuning the measured voltage ATCC Ubias FPar U Correction 0 950 1 050 3 1 000 Set point for voltage regulation related to the rated voltage valid at 1 0 ATCC_USet_FPar_ U Set 80 0 115 0 1 100 0 Dead band for voltage regulation related to the rated voltage ATCC_UDead_FPar_ U Deadband 0 5 9 0 1 3 0 Hysteresis value for the dead band related to the dead band ATCC DeadHyst FPar Deadband Hysteresis 9o 60 90 0 85 Parameter for the current compensation ATCC URinc FPar R Compound Factor 0 0 15 0 1 5 0 Parameter for the current compensation ATCC UXinc FPar X Compound Factor 0 0 15 0 1 5 0 Reduced set point 1 for voltage regulation priority related to the rated voltage ATCC_VRed1_FPar_ Voltage Reduction 1 0 0 10 0 1 5 0 Reduced set point
10. e O t l ffi Dios hA where Oo is the starting temperature Remember that the calculation of the measurable temperature is as follows Temperature t O t Temp_ambient where Temp_ambient is the ambient temperature In a separate document it is proven that some more easily measurable parameters can be introduced instead of the aforementioned ones Thus the general form of equation above is 2 lt LA n Efi i O L n where H t is the thermal level of the heated object this is the temperature as a percentage of the On reference temperature This is a dimensionless quantity but it can also be expressed in a percentage form On is the reference temperature above the temperature of the environment which can be measured in steady state in case of a continuous In reference current In is the reference current can be considered as the nominal current of the heated object If it flows continuously then the reference temperature can be measured in steady state is a parameter of the starting temperature related to the reference temperature The RMS calculations modul calculate the RMS values of the phase currents individually The sampling frequency of the calculations is 1 kHz therefore theoretically the frequency components below 500Hz are considered correctly in the RMS values This module is not part of the thermal overload function it belongs to the preparatory phase The Max selection mod
11. tle Selection range Default The control model of the circuit breaker node according to the IEC 61850 standard CB1Pol ctlMod EPar ControlModel SBO enhanced Direct normal Direct enhanced Direct normal ControlModel e Direct normal e Direct enhanced supervision e SBO enhanced supervision only command transmission command transmission with status check and command Select Before Operate mode with status check and command Table 76 Enumerated parameter of the circuit breaker control function Boolean parameter Boolean parameter Title Explanation CB1Pol DisOverR BPar If true then the check function cannot be neglected Forced check by the check attribute defined by the IEC 61850 standard Table 77 Boolean parameter of the circuit breaker control function Timer parameters Parameter name Title Unit Min Max Step Default Timeout for signaling failed operation CB1Pol TimOut TPar Max Operating time msec 10 1000 1 200 Duration of the generated On and Off impulse CB1Pol Pulse TPar Pulse length msec 50 500 1 100 Waiting time at expiry intermediate state of the CB is reported CB1Pol_MidPos_TPar Max Intermediate mse 20 30000 1 100 time Length of the time period to wait for the conditions of the synchron state After expiry of this time the synchro switch procedure is initiated see sy
12. Connection U1 3 Ph N Isolated Ph N Selection of the fourth channel input phase to neutral or phase to phase voltage VT4 Ch4Nom EPar Connection U4 Ph N Ph Ph Ph Ph Definition of the positive direction of the first three input channels given as normal or inverted VT4 Ch13Dir EPar_ Direction U1 3 Normal Inverted Normal Definition of the positive direction of the fourth voltage given as normal or inverted VT4 Ch4Dir EPar Direction U4 Normal Inverted Normal Table 88 The enumerated parameters of the voltage input function Integer parameter Parameter name Title Unit Min Max Step Default Voltage correction VT4 CorrFact IPar VT correction 100 115 1 100 Table 89 The integer parameter of the voltage input function Floating point parameters Parameter name Title Dim Min Max Default Rated primary voltage of channel1 VT4 PriU1 FPar Rated Primary U1 kV 1 1000 100 Rated primary voltage of channel2 VT4 PriU2 FPar Rated Primary U2 RV 1 1000 100 Rated primary voltage of channel3 VT4 PriU3 FPar Rated Primary U3 RV 1 1000 100 Rated primary voltage of channel4 VT4 PriU4 FPar Rated Primary U4 RV 1 1000 100 Table 90 The floating point parameters of the voltage input function DVEZ CONFIG V1 1 doc 62 71 DVEZ Bay control unit configurations description NOTE The rated primary voltage of the channels is not nee
13. Figure 12 Reporting if Integrated mode is selected DVEZ CONFIG V1 1 doc 68 71 DVEZ Bay control unit configurations description Periodic reporting Periodic reporting is generated independently of the changes of the measured values when the defined time period elapses The required parameter setting is shown in Table 96 Integer parameters Parameter name Title Unit Min Max Step Default Reporting time period for the active power MXU PlintPer IPar Report period P sec 0 3600 1 0 Reporting time period for the reactive power MXU QintPer IPar Report period Q sec 0 3600 1 0 Reporting time period for the apparent power MXU SintPer IPar Report period S sec 0 3600 1 0 Reporting time period for the voltage MXU UlntPer IPar Report period U sec 0 3600 1 0 Reporting time period for the current MXU lintPer IPar Report period sec 0 3600 1 0 Reporting time period for the frequency MXU fintPer IPar Report period f sec 0 3600 1 0 Table 96 The integer parameters of the line measurement function If the reporting time period is set to 0 then no periodic reporting is performed for this quantity All reports can be disabled for a quantity if the reporting mode is set to Off See Table 94 Technical data Function Range Accuracy Current accuracy 0 2 In 0 5 In 2 1 digit with CT 5151 or CT 5102 modu
14. Operation Off On On Table 20 The enumerated parameter of the residual definite time overvoltage protection function Integer parameter Parameter name Title Unit Min Max Step Default Starting voltage parameter TOV59N_StVol_IPar_ Start Voltage 2 60 1 30 Table 21 The integer parameter of the residual definite time overvoltage protection function Boolean parameter Parameter name Title Default Enabling start signal only TOV59N_StOnly_BPar_ Start Signal Only FALSE Table 22 The boolean parameter of the residual definite time overvoltage protection function Timer parameter Parameter name Title Unit Min Max Step Default Definite time delay TOV59N_Delay_TPar_ Time Delay ms 0 60000 1 100 Table 23 The time parameter of the residual definite time overvoltage protection function DVEZ_CONFIG_V1 1 doc 17 71 DVEZ Bay control unit configurations description 1 3 1 5 Synchrocheck function SYN25 Several problems can occur in the electric power system if the circuit breaker closes and connects two systems operating asynchronously The high current surge can cause damage in the interconnecting elements the accelerating forces can overstress the shafts of rotating machines or at last the actions taken by the protective system can result in the unwanted separation of parts of the electric power system To prevent such problems this function checks whether the systems to be interconnected are operating
15. Setting of the action time max allowable duration between protection start and trip REC79 Act TPar_ Action Time msec 0 20000 10 1000 Limitation of the starting signal trip command is too long or the CB open signal received too late REC79 MaxSt TPar Start Signal Max Time msec 0 10000 10 1000 Max delaying the start of the dead time counter REC79 DtDel TPar DeadTime Max Delay msec 0 100000 10 3000 Waiting time for circuit breaker ready to close signal REC79 CBTO TPar CB Supervision Time msec 10 100000 10 1000 Waiting time for synchronous state signal REC79_SYN1_TPar_ SynCheck Max Time msec 500 100000 10 10000 Waiting time for synchronous switching signal REC79_SYN2_TPar_ SynSW Max Time msec 500 100000 10 10000 Table 35 The timer parameters of the auto reclosing protection function Boolean parameters Parameter name Title Default Explanation CB State Enable CB state monitoring for Not RECs CBSUIG BPar Monitoring 0 Ready state REC79_Acc1_BPar_ Accelerate 1 Trip 0 AE Al al staring REC79_Acc2_BPar_ Accelerate 2 Trip 0 ea mip COMM Da astaning REC79_Acc3_BPar_ Accelerate 3 Trip 0 ea mip Conte staring REC79 Acc4 BPar Accelerate 4 Trip 0 ao Hip gommand ES LA REC79 Acc5 BPar Accelerate FinTrip 0 Accelerate final trip command Table 36 The boolean parameters of the auto reclosing protection function DVEZ CONFIG V1 1 doc 28 71 DVEZ Bay contr
16. block using the graphic equation editor The function block supports the control models prescribed by the IEC 61850 standard All necessary timing tasks are performed within the function block o Time limitation to execute a command o Command pulse duration o Filtering the intermediate state of the circuit breaker o Checking the synchro check and synchro switch times o Controlling the individual steps of the manual commands Sending trip and close commands to the circuit breaker to be combined with the trip commands of the protection functions and with the close command of the automatic reclosing function the protection functions and the automatic reclosing function directly gives commands to the CB The combination is made graphically using the graphic equation editor Operation counter Event reporting DVEZ_CONFIG_V1 1 doc 50 71 DVEZ Bay control unit configurations description The Circuit breaker control function block has binary input signals The conditions are defined by the user applying the graphic equation editor The signals of the circuit breaker control are seen in the binary input status list Technical data Function Operate time accuracy Table 75 Technical data of the circuit breaker control function Accuracy 5 or 15 ms whichever is greater DVEZ_CONFIG_V1 1 doc 51 71 DVEZ Bay control unit configurations description Parameters Enumerated parameter Parameter name Ti
17. control unit configurations description Boolean parameter Boolean parameter Title Explanation DisConn_DisOverR_BPar_ Forced check If true then the check function cannot be neglected by the check attribute defined by the IEC 61850 standard Table 81 Boolean parameter of the disconnector control function Timer parameters Parameter name Title Unit Min Max Step Default Timeout for signaling failed operation DisConn_TimOut_TPar_ Max Operating time msec 10 20000 1 1000 Duration of the generated On and Off impulse DisConn Pulse TPar Pulse length msec 50 30000 1 100 Waiting time at expiry intermediate state of the disconnector is reported DisConn MidPos TPar M x Intermediate msec 20 30000 1 100 Duration of the waiting time between object selection and command selection At timeout no command is performed DisConn SBOTineout I 6B Timeout msec 1000 20000 4 5000 TPar_ Table 82 Timer parameters of the disconnector control function Available internal status variable and command channel To generate an active scheme on the local LCD there is an internal status variable indicating the state of the disconnector Different graphic symbols can be assigned to the values See Chapter 3 2 of the document EuroCAP configuration tool for EuroProt devices Status variable Title Explanation Can
18. how the calculated Fourier components are displayed in the on line block See the document EuroProt Remote user interface description T4 module Voltage Ch U1 56 75 Angle Ch U1 0 deg Voltage Ch U2 51 46 Angle Ch U2 112 deg Voltage Ch U3 60 54 Angle Ch U3 128 deg Voltage Ch U4 0 00 Angle Ch U4 0 deg Figure 9 Example On line displayed values for the voltage input module DVEZ_CONFIG_V1 1 doc 63 71 DVEZ Bay control unit configurations description 1 3 3 3 Line measurement function MXU The measurement The input values of the EuroProt devices are the secondary signals of the voltage transformers and those of the current transformers These signals are pre processed by the Voltage transformer input function block and by the Current transformer input function block These function blocks are described in separate documents The pre processed values include the Fourier basic harmonic phasors of the voltages and currents and the true RMS values Additionally it is in these function blocks that parameters are set concerning the voltage ratio of the primary voltage transformers and current ratio of the current transformers Based on the pre processed values and the measured transformer parameters the Line measurement function block calculates depending on the hardware and software configuration the primary RMS values of the voltages and currents and some additional
19. phase L1 Current L2 True RMS value of the current in phase L2 Current L3 True RMS value of the current in phase L3 Voltage L1 True RMS value of the voltage in phase L1 Voltage L2 True RMS value of the voltage in phase L2 Voltage L3 True RMS value of the voltage in phase L3 Voltage L12 True RMS value of the voltage between phases L1 L2 Voltage L23 True RMS value of the voltage between phases L2 L3 Voltage L31 True RMS value of the voltage between phases L3 L1 Frequency Frequency Metering MTR DVEZ_CONFIG_V1 1 doc 56 71 DVEZ Bay control unit configurations description Forward MWh Forward MWh Backward MWh Backward MWh Forward MVArh Forward MVArh Backward MVArh Backward MVArh kK kK i The reference angle is the phase angle of Voltage Ch U1 Applied measuring functions depend on the HW and the SW configuratuion Table 83 Measured analog values DVEZ_CONFIG_V1 1 doc 57 71 DVEZ Bay control unit configurations description 1 3 3 1 Current input function CT4 If the factory configuration includes a current transformer hardware module the current input function block is automatically configured among the software function blocks Separate current input function blocks are assigned to each current transformer hardware module A current transformer hardware module is equipped with four special intermediate current transformers See Chapter 5 of the Eu
20. starting signal of the cycles can be generated by any combination of the protection functions or external signals of the binary inputs The selection is made by graphic equation programming The automatic reclosing function is triggered if as a consequence of a fault a protection function generates a trip command to the circuit breaker and the protection function resets because the fault current drops to zero or the circuit breaker s auxiliary contact signals open state According to the preset parameter values either of these two conditions starts counting the dead time at the end of which the HV automatic reclosing function generates a close command automatically If the fault still exists or reappears then within the Reclaim time started at the close command the protection functions picks up again and the subsequent cycle is started If no pickup is detected within this time then the HV automatic reclosing cycle resets and a new fault will start the procedure with the first cycle again At the moment of generating the close command the circuit breaker must be ready for operation which is signaled via a binary input CB Ready The Boolean parameter CB State Monitoring enables the function The preset parameter value CB Supervision time decides how long the HV automatic reclosing function is allowed to wait at the end of the dead time for this signal If the signal is not received during this dead time extension then the HV automati
21. supervision is selected by the user then the current limit values have no meaning The binary inputs indicating the status of the circuit breaker poles must be programmed correctly using the graphic equation editor If the parameter selection is Current Contact the current parameters and the status signals must be set correctly The breaker failure protection function resets only if all conditions for faultless state are fulfilled If at the end of the running time of the backup timer the currents do not drop below the pre defined level and or the monitored circuit breaker is still in closed position then a backup trip command is generated If repeated trip command is to be generated for the circuit breakers that are expected to open then the enumerated parameter Retrip must be set to On In this case at the end of the retrip timer s a repeated trip command is also generated in the phase s where the retrip timer s run off The pulse duration of the trip command is not shorter than the time defined by setting the parameter Pulse length The breaker failure protection function can be disabled by setting the enabling parameter to Off Dynamic blocking inhibition is possible using the binary input Block The conditions are to be programmed by the user using the graphic equation editor Technical data Function Effective range Accuracy Current accuracy lt 2 Retrip time approx 15 ms BF time accuracy 5
22. synchronously If yes then the close command is transmitted to the circuit breaker In case of asynchronous operation the close command is delayed to wait for the appropriate vector position of the voltage vectors on both sides of the circuit breaker If the conditions for safe closing cannot be fulfilled within an expected time then closing is declined The conditions for safe closing are as follows e The difference of the voltage magnitudes is below the declared limit e The difference of the frequencies is below the declared limit and e The angle difference between the voltages on both sides of the circuit breaker is within the declared limit The function processes both automatic reclosing and manual close commands The limits for automatic reclosing and manual close commands can be set independently of each other The function compares the voltage of the line and the voltage of one of the bar sections Bus1 or Bus2 The bus selection is made automatically based on a binary input signal defined by the user applying the graphic equation editor As to voltages any phase to ground or phase to phase voltage can be selected The function processes the signals of the voltage transformer supervision function and enables the close command only in case of plausible voltages There are three modes of operation e Energizing check o Dead bus live line o Live bus dead line o Any Energizing Case including Dead bus dead line e Synchr
23. 0 After a protection function generates a trip command it is expected that the circuit breaker opens and the fault current drops below the pre defined normal level If not then an additional trip command must be generated for all backup circuit breakers to clear the fault At the same time if required a repeated trip command can be generated to the circuit breakers which are a priori expected to open The breaker failure protection function can be applied to perform this task The starting signal of the breaker failure protection function is usually the trip command of any other protection function assigned to the protected object The user has the task to define these starting signals using the graphic equation editor or if the operation of the individual phases is needed then the start signals for the phases individually Two dedicated timers start at the rising edge of the start signals at the same time one for the backup trip command and one for the repeated trip command separately for operation in the individual phases During the running time of the timers the function optionally monitors the currents the closed state of the circuit breakers or both according to the user s choice The selection is made using an enumerated parameter If current supervision is selected by the user then the current limit values must be set correctly The binary inputs indicating the status of the circuit breaker poles have no meaning If contact
24. 00 ms then the VTS failure signal does not reset it is generated continuously even when the line is in a disconnected state Thus the VTS Failure signal remains active at reclosing e If the Dead line state is started and the VTS Failure signal has not been continuous for at least 100 ms then the VTS failure signal resets Technical data Function Value Accuracy Pick up voltage lo 0A lt 1 12 0A lt 1 Operation time lt 20ms Reset ratio 0 95 Table 67 Technical data of the voltage transformer supervision function Parameters Integer parameters Parameter name Title Unit Min Max Step Default Integer parameters of the dead line detection function DLD ULev IPar Min Operate Voltage Jo 10 100 1 60 DLD ILev IPar Min Operate Current 2 100 1 10 Starting voltage and current parameter for residual and negative sequence detection VTS Uo IPar Start URes 5 50 1 30 VTS lo IPar Start IRes 10 50 1 10 VTS Uneg IPar Start UNeg 5 50 1 10 VTS Ineg IPar Start INeg 10 50 1 10 Table 68 The integer parameters of the voltage transformer supervision function Enumerated parameter Parameter name Title Selection range Default Parameter for type selection Off Zero sequence Neg sequence Zero VTS Oper EPar Operation Special sequence Table 69 The enumerated parameter of the voltage tr
25. 1 1 doc 42 71 DVEZ Bay control unit configurations description 1 3 1 13 Phase selective trip logic TRC94_PhS The phase selective trip logic function operates according to the functionality required by the IEC 61850 standard for the Trip logic logical node The function receives the trip requirements of the protective functions implemented in the device and combines the parameters and the binary signals into the outputs of the device The trip requirements are programmed by the user using the graphic equation editor The decision logic has the following aims e define a minimal impulse duration even if the protection functions detect a very short time fault e incase of phase to phase faults involve the third phase in the trip command e fulfill the requirements of the automatic reclosing function to generate a three phase trip command even in case of single phase faults e in case of an evolving fault during the evolving fault waiting time include all three phases into the trip command The decision logic module combines the status signals and enumerated parameters to generate the trip commands on the output module of the device Bik GenTr Off Trl1 StL1 Trl2 StL2 TrL3 Oper 3F TRIP DVEZ_CONFIG_V1 1 doc 43 71 DVEZ Bay control unit configurations description Technical data Function Accuracy Timer accuracy 5 or 15 ms whichever is greater Table 62 Te
26. 1L2 XCompoundFactor where R Compound Factor is a parameter value X Compound Factor is a parameter value The voltage of the load center of the network is controlled to be within a narrow range This assures that neither the voltage near to the busbar is too high nor the voltage at far away points of the network is too low The method is based on the estimated complex impedance between the busbar and the load center The parameter R Compound Factor means in this case the voltage drop in percent caused by the real component of the rated current The parameter X Compound Factor means in this case the voltage drop in percent caused by the imaginary component of the rated current NOTE if the active power flows from the network to the busbar then in AbsoluteComp mode no compounding is performed DVEZ_CONFIG_V1 1 doc 34 71 DVEZ Bay control unit configurations description Deadband Hysteresis U Set U Deadband _ i Deadband Hysteresis U Low Limit U Low Block Voltage checking in automatic control mode In automatic control mode the calculated Ucontrol voltage is checked to see if it is outside the limits The limits are defined by parameter values U Set is the setting value defining the centre of the permitted range U Deadband is the width of the permitted range in both and directions Deadband Hysteresis is the hysteresis decreasing the permitted range of the U Deadband a
27. 2 for voltage regulation related to the rated voltage ATCC VRed2 FPar Voltage Reduction 2 0 0 10 0 1 5 0 Maximum current value to be considered in current compensation formulas ATCC ICompLim FPar Comp Limit 0 00 150 0 1 Current upper limit to disable all operation ATCC IHVOC FPar Overload 50 150 0 100 Voltage upper limit to disable step up ATCC_UHigh_FPar_ U High Limit 90 0 120 0 1 110 0 Voltage lower limit to disable step down ATCC_ULow_FPar_ U Low Limit 70 0 110 0 1 90 0 Voltage lower limit to disable all operation ATCC_UBlock_FPar_ U Low Block 50 0 100 0 1 70 0 Time delay for the first control command generation ATCC T1 FPar T1 sec 1 0 600 0 1 10 0 Definite time delay for subsequent control command generation or fast operation if it is enabled ATCC T2 FPar T2 sec 1 0 100 0 1 10 0 In case of dependent time characteristics this is the minimum time delay ATCC MinDel FPar Min Delay sec 1 0 100 0 1 10 0 After a control command if the voltage is out of the range vvithin the reclaim time then the command is generated after T2 time delay ATCC Recl FPar Reclaim Time sec 1 0 100 0 1 10 0 Table 57 The float point parameters of the automatic tap changer controller function DVEZ_CONFIG_V1 1 doc 39 71 DVEZ Bay control unit configurations description DVEZ_CONFIG_V1 1 doc 40 71 DVEZ Bay control unit configurations description 1 3 1 12 Breaker failure protection function BRF5
28. 3PhDT2_TPar__ 2 Dead Time 3Ph msec 10 100000 10 2000 Dead time setting for the third reclosing cycle for multi phase fault REC79 3PhDT3 TPar 3 Dead Time 3Ph msec 10 100000 10 3000 Dead time setting for the fourth reclosing cycle for multi phase fault REC79 3PhDT4 TPar 4 Dead Time 3Ph msec 10 100000 10 4000 Reclaim time setting REC79 Rec_TPar_ Reclaim Time msec 100 100000 10 2000 Impulse duration setting for the CLOSE command REC79 Close TPar_ Close Command Time msec 10 10000 10 100 Setting of the dynamic blocking time REC79 DynBIR TPar Dynamic Blocking Time msec 10 100000 10 1500 Setting of the blocking time after manual close command REC79 MC TPar Block after Man Close msec 0 100000 10 1000 Setting of the action time max allowable duration between protection start and trip REC79 Act TPar_ Action Time msec 0 20000 10 1000 Limitation of the starting signal trip command is too long or the CB open signal received too late REC79 MaxSt TPar Start Signal Max Time msec 0 10000 10 1000 Max delaying the start of the dead time counter REC79 DtDel TPar DeadTime Max Delay msec 0 100000 10 3000 Waiting time for circuit breaker ready to close signal REC79 CBTO TPar CB Supervision Time msec 10 100000 10 1000 Waiting time for synchronous state signal REC79_SYN1_TPar_ Syn Check Max Time msec 500 100000 10 10000 Waiting time for synchronous switching signal REC79_SYN2_TPar_ SynSw Max Time msec 500 100000 10 10000
29. 40 60000 ms 20 ms Table 47 Technical data of the rate of change of frequency protection function Parameters Enumerated parameter Parameter name Title Selection range Default Selection of the operating mode FRC81_Oper_EPar_ Operation Off On On Table 48 The enumerated parameter of the rate of change of frequency protection function Boolean parameter Parameter name Title Default Enabling start signal only FRC81 StOnly BPar Start Signal Only True Table 49 The boolean parameter of the rate of change of frequency protection function DVEZ CONFIG V1 1 doc 31 71 DVEZ Bay control unit configurations description Float point parameter Parameter name Title Unit Min Max Step Default Setting value of the comparison FRC81_St_FPar_ Start df dt Hz sec 5 5 0 01 0 5 Table 50 The float point parameter of the rate of change of frequency protection function Timer parameters Parameter name Title Unit Min Max Step Default Time delay FRC81_Del_TPar_ Time Delay msec 100 60000 1 200 Table 51 The timer parameter of the rate of change of frequency protection function DVEZ_CONFIG_V1 1 doc 32 71 DVEZ Bay control unit configurations description 1 3 1 11 Automatic tap changer controller function ATCC One criterion for power quality is to keep the voltage of selected points of the networks within the prescribed limits The most common mode of vol
30. Residual definite time overvoltage protection function TOV59N The residual definite time overvoltage protection function operates according to definite time characteristics using the RMS values of the fundamental Fourier component of the zero sequence voltage UN 3U0 The Fourier calculation inputs are the sampled values of the residual or neutral voltage UN 3Uo and the outputs are the RMS value of the basic Fourier components of those The function generates start signal if the residual voltage is above the level defined by parameter setting value The function generates a trip command only if the definite time delay has expired and the parameter selection requires a trip command as well The residual overvoltage protection function has a binary input signal which serves the purpose of disabling the function The conditions of disabling are defined by the user applying the graphic equation editor Technical data Function Value Accuracy Pick up starting accuracy as Kr 8 60 lt 15 Reset time Us Un 60 ms Us 0 50 ms Operate time 50 ms lt 20ms Table 19 Technical data of the residual definite time overvoltage protection function Parameters Enumerated parameter Parameter name Title Selection range Default Parameter for enabling disabling TOV59N_Oper_EPar_
31. V is 26 1 3 1 8 Over frequency protection function TOF81 29 1 3 1 9 Underfrequency protection function TUF81 30 1 3 1 10 Rate of change of frequency protection function FRC81 31 1 3 1 11 Automatic tap changer controller function ATCC eeeeseeseeeneeenees 33 1 3 1 12 Breaker failure protection function BRF50 VUVU 41 1 3 1 13 Phase selective trip logic TRC94 PhS ss 43 1 3 1 14 Dead line detection function DLD ss 45 1 3 1 15 Voltage transformer supervision function VTS60 srnnvnrnnnvnnnvnrrvvnnvrnrvrnrnrnvnrer 47 1 3 1 16 Current unbalance function VCB60 ss 49 1 3 2 Control functions i ive irene n recat 50 1 3 2 1 Circuit breaker control function block CB1Pol ss 50 1 3 2 2 Disconnector control function DisConn RRRRRRR 54 1 3 3 Measuring TUNCTIONS vunnet akselerere kaken eee 56 1 3 3 1 Current input function CT4 ire 58 1 3 3 2 Voltage input function VT4 inner 61 1 3 3 3 Line measurement function MXU su 64 1 3 4 Disturbance recorder sisi 70 13 5 EVONnt TOCORJET assirinati dasar iin sanaaa ia eiat 71 14 LED ssSgNment L raus STE 71 DVEZ CONFIG V1 1 doc 3 71 D
32. VEZ Bay control unit configurations description 1 Configuration description The DVEZ bay control unit device is a member of the EuroProt product line made by Protecta Co Ltd The EuroProt type complex protection in respect of hardware and software is a modular device The modules are assembled and configured according to the requirements and then the software determines the functions This manual describes the specific application of the DVEZ factory configurations 1 1 Application DVEZ IEDs inteligent electronic devices are used for bay control unit applications in transmission and distribution network They provides full control for any type of switchgears included the interlocking functions and other substation application The DVEZ factory configurations implement the basic functionality but you can add optional functions to increase functionality of the device Optional functions Breaker failure protection Synchrocheck Automatic reclosing function for HV MV networks Automatic voltage regulator AVR tap change control Remote binary transmission Remote Binary Communication Voltage protection functions Thermal protection Overfrequency protection Underfrequency protection Load shedding 1 1 1 Configurations The DVEZ bay control unit is available in two basic configuations E1 BCU This configuration has no analog inputs it is designed for simplified bay control functions to switch and supervise any kind of switchgears a
33. age protection function DVEZ CONFIG V1 1 doc 15 71 DVEZ Bay control unit configurations description 1 3 1 3 Definite time undervoltage protection function TUV27 The definite time undervoltage protection function measures the RMS values of the fundamental Fourier component of three phase voltages The Fourier calculation inputs are the sampled values of the three phase voltages UL1 UL2 UL3 and the outputs are the basic Fourier components of the analyzed voltages UL1Four UL2Four UL3Four They are not part of the TUV27 function they belong to the preparatory phase The function generates start signals for the phases individually The general start signal is generated if the voltage is below the preset starting level parameter setting value and above the defined blocking level The function generates a trip command only if the definite time delay has expired and the parameter selection requires a trip command as well The operation mode can be chosen by the type selection parameter The function can be disabled and can be set to 1 out of 3 2 out of 3 and All The overvoltage protection function has a binary input signal which serves the purpose of disabling the function The conditions of disabling are defined by the user applying the graphic equation editor Technical data Function Value Accuracy Pick up start
34. ansformer Voltage transformer supervision function supervision block description BRF50 Breaker failure Breaker failure protection function block description DLD Dead line detection Dead line detection protection function block description The applied functions depends on the HW and the User s request Table 4 Implemented protection functions DVEZ_CONFIG_V1 1 doc 11 71 DVEZ Bay control unit configurations description 1 3 1 1 Line thermal protection function TTR49L Basically line thermal protection measures the three sampled phase currents RMS values are calculated and the temperature calculation is based on the highest RMS value of the phase currents The temperature calculation is based on the step by step solution of the thermal differential equation This method yields overtemperature meaning the temperature above the ambient temperature Accordingly the temperature of the protected object is the sum of the calculated overtemperature and the ambient temperature If the calculated temperature calculated overtemperature ambient temperature is above the threshold values alarm trip and restart blocking status signals are generated For correct setting the following values must be measured and set as parameters rated load current is the continuous current applied for the measurement rated temperature is the steady state temperature at rated load current base temperature is the temper
35. ansformer supervision function DVEZ CONFIG V1 1 doc 48 71 DVEZ Bay control unit configurations description 1 3 1 16 Current unbalance function VCB60 The current unbalance protection function VCB60 can be applied to detect unexpected asymmetry in current measurement The applied method selects maximum and minimum phase currents RMS value of the fundamental Fourier components If the difference between them is above the setting limit the function generates a start signal It is a necessary precondition of start signal generation that the maximum of the currents be above 10 of the rated current and below 150 of the rated current The Fourier calculation modules calculate the RMS value of the basic Fourier current components of the phase currents individually They are not part of the VCB60 function they belong to the preparatory phase The analog signal processing module processes the RMS value of the basic Fourier current components of the phase currents to prepare the signals for the decision It calculates the maximum and the minimum value of the RMS values and the difference between the maximum and minimum of the RMS values of the fundamental Fourier components of the phase currents as a percentage of the maximum of these values Als If the maximum of the currents is above 10 of the rated current and below 150 of the rated current and the Al gt value is above the limit defined by the preset parameter Start Curre
36. ature of the environment during the measurement and the time constant is the measured heating cooling time constant of the exponential temperature function When energizing the protection device the algorithm permits the definition of the starting temperature as the initial value of the calculated temperature The parameter Startup Term is the initial temperature above the temperature of the environment as compared to the rated temperature above the temperature of the environment The ambient temperature can be measured using e g a temperature probe generating electric analog signals proportional to the temperature In the absence of such measurement the temperature of the environment can be set using the dedicated parameter TTR49L Amb IPar Ambient Temperature The selection between parameter value and direct measurement is made by setting the binary Boolean parameter The problem of metal elements the protected line exposed to the sun is that they are overheated as compared to the ambient temperature even without a heating current furthermore they are cooled mostly by the wind and the heat transfer coefficient is highly dependent on the effects of the wind As the overhead lines are located in different geographical environments along the tens of kilometers of the route the effects of the sun and the wind cannot be considered in detail The best approximation is to measure the temperature of a piece of overhead line without current but e
37. be 0 Intermediate DisConn _stVal_Ist_ Status 1 Off 2 On 3 Bad The available control channel to be selected is Command channel Title Explanation Can be DisConn Oper Con Operation On Off Using this channel the pushbuttons on the front panel of the device can be assigned to close or open the disconnector These are the Local commands DVEZ CONFIG V1 1 doc 55 71 DVEZ Bay control unit configurations description 1 3 3 Measuring functions The measured values can be checked on the touch screen of the device in the On line functions page or using an Internet browser of a connected computer The displayed values are secondary voltages and currents except the block Line measurement This specific block displays the measured values in primary units using VT and CT primary value settings Analog value Explanation VT4 module Voltage Ch U1 RMS value of the Fourier fundamental harmonic voltage component in phase L1 Angle Ch Ut Phase angle of the Fourier fundamental harmonic voltage component in phase L1 Voltage Ch U2 RMS value of the Fourier fundamental harmonic voltage component in phase L2 Angle Ch U2 Phase angle of the Fourier fundamental harmonic voltage component in phase L2 Voltage Ch U3 RMS value of the Fourier fundamental harmonic voltage component in phase L3 Angle Ch U3 Phase angle of the Fourier
38. c reclosing function terminates Depending on binary parameter settings the automatic reclosing function block can accelerate trip commands of the individual reclosing cycles This function needs user programmed graphic equations to generate the accelerated trip command In case of a manual close command which is assigned to the logic variable Manual Close using graphic equation programming a preset parameter value decides how long the HV automatic reclosing function should be disabled after the manual close command The duration of the close command depends on preset parameter value Close command time but the close command terminates if any of the protection functions issues a trip command The HV automatic reclosing function can control up to four reclosing cycles Depending on the preset parameter value Reclosing cycles there are different modes of operation Disabled No automatic reclosing is selected 1 Enabled Only one automatic reclosing cycle is selected 1 2 Enabled Two automatic reclosing cycles are activated 1 2 3 Enabled Three automatic reclosing cycles are activated 1 2 3 4 Enabled All automatic reclosing cycles are activated The function can be switched Off On using the parameter Operation The user can also block the HV automatic reclosing function applying the graphic equation editor The binary status variable to be programmed is Block Depending on the present parameter value R
39. ces is the supervision of the auxiliary contacts of the miniature circuit breakers in the voltage transformer secondary circuits This function is not described here The user has to generate graphic equations for the application of the signal of this voltage transformer supervision function This function is interconnected with the dead line detection function Although the dead line detection function is described fully in a separate document the explanation necessary to understand the operation of the VT supervision function is repeated also in this document The voltage transformer supervision function can be used in three different modes of application Zero sequence detection for typical applications in systems with grounded neutral VT failure signal is generated if the residual voltage 3Uo is above the preset voltage value AND the residual current 310 is below the preset current value Negative sequence detection for typical applications in systems with isolated or resonant grounded Petersen neutral VT failure signal is generated if the negative sequence voltage component U2 is above the preset voltage value AND the negative sequence current component 12 is below the preset current value Special application VT failure signal is generated if the residual voltage 3Uo is above the preset voltage value AND the residual current 310 AND the negative sequence current component 12 are below the pres
40. chnical data of the phase selective trip logic function Parameters Enumerated parameter Parameter name Title Selection range Default Selection of the operating mode TRC94_Oper_EPar_ Operation Off 3ph trip 1ph 3ph trip 3ph trip Tables 63 The enumerated parameter of the phase selective trip logic function Timer parameter Parameter name Title Unit Min Max Step Default Minimum duration of the generated impulse TRC94 TrPu TPar Min Pulse Duration msec 50 60000 1 150 Waiting time for evolving fault TRC94 Evo TPar Evolving Fault Time msec 50 60000 1 1000 Table 64 Timer parameter of the phase selective trip logic function DVEZ_CONFIG_V1 1 doc 44 71 DVEZ Bay control unit configurations description 1 3 1 14 Dead line detection function DLD The Dead Line Detection DLD function generates a signal indicating the dead or live state of the line Additional signals are generated to indicate if the phase voltages and phase currents are above the pre defined limits The task of the Dead Line Detection DLD function is to decide the Dead line Live line state Criteria of Dead line state all three phase voltages are below the voltage setting value AND all three currents are below the current setting value Criteria of Live line state all three phase voltages are above the voltage setting value The details are described in
41. ck o Time limitation to execute a command o Command pulse duration o Filtering the intermediate state of the disconnector o Controlling the individual steps of the manual commands e Sending trip and close commands to the disconnector e Operation counter e Event reporting The Disconnector control function block has binary input signals The conditions are defined by the user applying the graphic equation editor The signals of the disconnector control are seen in the binary input status list Technical data Function Accuracy Operate time accuracy 5 or 15 ms whichever is greater Table 79 Technical data of the disconnector control function Parameters Enumerated parameters Parameter name Title Selection range Default The control model of the disconnector node according to the IEC 61850 standard DisConn ctiMod EPar ControlModel Direct normal Direct enhanced Direct normal SBO enhanced Type of switch N A Load break Disconnector Earthing Switch HS Earthing Switch Disconnector DisConn_SwTyp_EPar_ Type of Switch ControlModel e Direct normal only command transmission e Direct enhanced command transmission with status check and command supervision e SBO enhanced Select Before Operate mode with status check and command supervision Table 80 Enumerated parameters of the disconnector control function DVEZ_CONFIG_V1 1 doc 54 71 DVEZ Bay
42. ck reclosing or perform three ph ase automatic Evolving REC79 EvoFit EPar Fault Block Reclosing Start 3Ph Rec Block Reclosing Table 30 The enumerated parameters of the rate of auto reclose function DVEZ_CONFIG_V1 1 doc 23 71 DVEZ Bay control unit configurations description Timer parameters Parameter name Title Unit Min Max Step Default Dead time setting for the first reclosing cycle for single phase fault REC79 1PhDT1 TPar 1 Dead Time 1Ph msec O 100000 10 500 Dead time setting for the second reclosing cycle for single phase fault REC79 1PhDT2_TPar__ 2 Dead Time 1Ph msec 10 100000 10 600 Dead time setting for the third reclosing cycle for single phase fault REC79 1PhDT3 TPar 3 Dead Time 1Ph msec 10 100000 10 700 Dead time setting for the fourth reclosing cycle for single phase fault REC79 1PhDT4 TPar 4 Dead Time 1Ph msec 10 100000 10 800 Dead time setting for the first reclosing cycle for multi phase fault REC79 3PhDT1 TPar 1 1 Dead Time 3Ph msec 0 100000 10 1000 Special dead time setting for the first reclosing cycle for multi phase fault REC79 3PhDT1 TPar 2 1 Special DT 3Ph msec 0 100000 10 1350 Dead time setting for the second reclosing cycle for multi phase fault REC79
43. condary current of the fourth input channel 1A or 5A is selected by parameter setting no hardware modification is needed 1A 5A 0 2A or 1A La CT4 Ch4Nom EPar Rated Secondary 14 Definition of the positive direction of the first three currents given by location of the secondary star connection point CT4 Ch13Dir EPar Starpoint 11 3 Line Bus Line Definition of the positive direction of the fourth current given as normal or inverted CT4 Ch4Dir EPar Direction 14 Normal inverted Normal Table 85 The enumerated parameters of the current input function Floating point parameters Parameter name Title Dim Min Max Default Rated primary current of channeli CT4 Pril1 FPar Rated Primary 11 A 100 4000 1000 Rated primary current of channel2 CT4 Pril2 FPar Rated Primary 12 A 100 4000 1000 Rated primary current of channel3 CT4 Pril3 FPar_ Rated Primary 13 A 100 4000 1000 Rated primary current of channel4 CT4 Pril4 FPar Rated Primary 14 A 100 4000 1000 Table 86 The floating point parameters of the current input function NOTE The rated primary current of the channels is not needed for the current input function block itself These values are passed on to the subsequent function blocks The measured values of the current input function block Measured value Dim Explanatio
44. ded for the voltage input function block itself These values are passed on to the subsequent function blocks Function Range Accuracy Voltage accuracy 30 13090 lt 0 5 Table 91 Technical data of the voltage input Measured values Measured value Dim Explanation Voltage Ch U1 V secondary Fourier basic component of the voltage in channel UL1 Angle Ch U1 degree Vector position of the voltage in channel UL1 Voltage Ch U2 V secondary Fourier basic component of the voltage in channel UL2 Angle Ch U2 degree Vector position of the voltage in channel UL2 Voltage Ch U3 V secondary Fourier basic component of the voltage in channel UL3 Angle Ch U3 degree Vector position of the voltage in channel UL3 Voltage Ch U4 V secondary Fourier basic component of the voltage in channel U4 Angle Ch U4 degree Vector position of the voltage in channel U4 Table 92 The measured analogue values of the voltage input function NOTE1 The scaling of the Fourier basic component is such if pure sinusoid 57V RMS of the rated frequency is injected the displayed value is 57V The displayed value does not depend on the parameter setting values Rated Secondary NOTE2 The reference vector vector with angle 0 degree is the vector calculated for the first voltage input channel of the first applied voltage input module The figure below shows an example of
45. e are two compensation modes to be selected AbsoluteComp and ComplexComp e If the parameter Compensation is set to AbsoluteComp the calculation method is as follows In this simplified method the vector positions are not considered correctly the formula above is approximated with the magnitudes only lUcontroll Ubus Udrop Ubus Udrop RE Ubus I R CompoundF actor where R Compound Factor is a parameter value If the current is above the value defined by the parameter I Comp Limit then in the formulas above this preset value is considered instead of the higher values measured The method is based on the experiences of the network operator Information is needed how much is the voltage drop between the busbar and the load center if the load of the network is the rated load The parameter R Compound Factor means in this case the voltage drop in percent e f the parameter Compensation is set to ComplexComp the calculation method is as follows In this simplified method the vector positions are partly considered In the formula above the voltage drop is approximated with the component of the voltage drop the direction of which is the same as the direction of the bus voltage vector This is length component of the voltage drop the perpendicular component of the voltage drop is neglected lUcontroll JUbus IL1L2p R CompoundFactor IL
46. e set by the parameter U High Limit then control to increase the voltage is disabled e If the voltage of the controlled side UL1L2 is below the value set by the parameter U Low Limit then control to decrease the voltage is disabled e If the voltage of the controlled side UL1L2 is below the value set by the parameter U Low Block then the transformer is considered to be de energized and automatic control is completely disabled e f the current of the supply side IHV is above the limit set by the parameter Overload then both automatic and manual controls are completely disabled This is to protect the switches inside the tap changer Automatic control mode Voltage compensation in automatic control mode The function gets the Fourier components of the busbar voltage and those of the current e UL1L2re and UL1L2m e IL1L2re and L1L2m In automatic control mode the voltage of the controlled side UL1L2 is compensated by the current of the controlled side L1L2 This means that the voltage of the load center of the network is controlled to be constant in fact within a narrow range This assures that neither the voltage near to the busbar is too high nor the voltage at far away points of the network is too low The voltage of the load center i e the controlled voltage is calculated as lUcontroll Ubus Udrap DVEZ CONFIG V1 1 doc 33 71 DVEZ Bay control unit configurations description Ther
47. eclosing started by the HV automatic reclosing function can be started either by resetting of the TRIP command or by the binary signal indicating the open state of the circuit breaker If the reset state of the TRIP command is selected to start the HV automatic reclosing function then the conditions are defined by the user applying the graphic equation editor The binary status variable to be programmed is AutoReclosing Start DVEZ_CONFIG_V1 1 doc 21 71 DVEZ Bay control unit configurations description If the open state of the circuit breaker is selected to start the HV automatic reclosing function then additionally to programming the AutoReclosing Start signal the conditions for detecting the open state of the CB are defined by the user applying the graphic equation editor For all four reclosing cycles separate dead times can be defined for single phase reclosing after single phase trip commands as a consequence of single phase faults and for three phase reclosing after three phase trip commands as a consequence of multi phase faults The different dead time settings of single phase reclosing and three phase reclosing can be justified as follows in case of a single phase fault only the circuit breakers of the faulty phase open In this case due to the capacitive coupling of the healthy phases the extinction of the secondary arc at the fault location can be delayed Consequently a longer dead time is needed for the faul
48. ection for compensation mode ATCC_Comp_EPar_ Compensation Off AbsoluteComp ComplexComp Off Tap changed supervision mode selection ATCC_TCSuper_EPar_ TC Supervision Off TCDrive Position Both Off Decoding of the position indicator bits ATCC_CodeType_EPar CodeType Binary BCD Gray Binary Table 53 The enumerated parameters of the automatic tap changer controller Boolean parameters function Parameter name Title Explanation Default ATCC FastHigh BPar Fast Higher Enable Enabling fast higher control command 0 ATCC_FastLow_BPar_ Fast Lower Enable Enabling fast lower control command 0 Table 54 The boolean parameters of the automatic tap changer controller function Integer parameters Parameter name Title Unit Min Max Step Default Code value of the minimum position ATCC MinPos Ipar Min Position 1 32 1 1 Code value of the maximum position ATCC MaxPos Ipar Max Position 1 32 1 32 Table 55 The integer parameters of the automatic tap changer controller function Timer parameters Parameter name Title Unit Min Max Step Default Time limit for tap change operation ATCC_TimOut_TPar_ Max Operating Time msec 1000 30000 1 5000 Command impulse duration ATCC Pulse TPar Pulse Duration msec 100 10000
49. el Time delay can also be set The function can be enabled disabled by a parameter The over frequency protection function has a binary input signal The conditions of the input signal are defined by the user applying the graphic equation editor The signal can block the under frequency protection function Technical data Function Range Accuracy Operate range 40 70 Hz 30 mHz Effective range 45 55 H2 55 65 Hz 2mHz Operate time min 140 ms Time delay 140 60000 ms 20 ms Reset ratio 0 99 Table 31 Technical data of the over frequency protection function Parameters Enumerated parameter Parameter name Title Selection range Default Selection of the operating mode TOF81 Oper EPar Operation Off On On Table 38 The enumerated parameter of the over frequency protection function Boolean parameter Parameter name Title Default Enabling start signal only TOF81 StOnly BPar Start Signal Only FALSE Table 39 The boolean parameter of the over frequency protection function Float point parameter Parameter name Title Unit Min Max Step Default Setting value of the comparison TOF81 St FPar Start Frequency Hz 40 60 0 01 51 Table 40 The float point parameter of the over frequency protection function Timer parameter Parameter name Title Unit Min Max Step Default Time delay TOF81_Del_TPa
50. enable fast command generation if the voltage is above the parameter value U High Limit or below the U Low Limit In this case the time delay is a definite time delay defined by parameter T2 For subsequent control commands In this case the time delay is always a definite time delay defined by parameter T2 if the subsequent command is generated within the Reclaim time defined by a parameter The automatic control mode can be blocked by a binary signal received via binary input AutoBlk and generates a binary output signal AutoBlocked ext Manual control mode In manual mode the automatic control is blocked The manual mode can be Local or Remote For this mode the input Manual needs to be in active state as programmed by the user In the local mode the input Local needs to be in active state The binary inputs ManHigher or ManLower must be programmed graphically by the user In the remote mode the input Remote needs to be in active state as programmed by the user In this case manual commands are received via the communication interface DVEZ_CONFIG_V1 1 doc 36 71 DVEZ Bay control unit configurations description Command generation and tap changer supervision The software module CMD amp TC SUPERV is responsible for the generation of the HigherCmd and LowerCmd command pulses the duration of which is defined by the parameter Pulse Dura
51. enerates a trip command to the circuit breaker and the protection function resets because the fault current drops to zero or the circuit breaker s auxiliary contact signals open state According to the preset parameter values either of these two conditions starts counting the dead time at the end of which the MV automatic reclosing function generates a close command automatically If the fault still exits or reappears then within the Reclaim time the protection functions picks up again and the subsequent cycle is started If the fault still exists at the end of the last cycle the MV automatic reclosing function trips and generates the signal for final trip If no pickup is detected within this time then the MV automatic reclosing cycle resets and a new fault will start the procedure with the first cycle again At the moment of generating the close command the circuit breaker must be ready for operation which is signaled via the binary input CB Ready The preset parameter value CB Supervision time decides how long the MV automatic reclosing function is allowed to wait at the end of the dead time for this signal If the signal is not received during this dead time extension then the MV automatic reclosing function terminates Depending on binary parameter settings the automatic reclosing function block can accelerate trip commands of the individual reclosing cycles This function needs user programmed graphic equations to generate t
52. ented in case of a voltage decrease within the Max Operating Time e Both in this mode the previous two modes are combined In case of an error detected in the operation of the tap changer the Locked input becomes active and no further commands are performed To enable further operation the input Reset must be programmed for an active state by the user DVEZ_CONFIG_V1 1 doc 37 71 DVEZ Bay control unit configurations description Technical data Function Range Accuracy Voltage measurement 50 lt U lt 130 lt 1 Definite time delay lt 2 or 20 ms whichever is greater Inverse and 2powerN time delay 12 lt U lt 25 lt 5 25 lt U lt 50 lt 2 or 20 ms whichever is greater Table 52 Technical data of the automatic tap changer controller function Parameters Enumerated parameters Parameter name Title Selection range Default Control model according to IEC 61850 ATCC ctiMod EPar ControlModel Direct normal Direct enhanced Direct normal SBO enhanced Select before operate class according to IEC 61850 ATCC sboClass EPar sboClass Operate once Operate many Operate once Parameter for general blocking of the function ATCC Oper EPar Operation Off On Off Parameter for time delay mode selection ATCC_T1Type_EPar T1 Delay Type Definite Inverse 2povverN Definite Sel
53. er_EPar_ Operation Off Pulsed Locked Pulsed Table 6 The enumerated parameter of the line thermal protection function The meaning of the enumerated values is as follows Off the function is switched off no output status signals are generated Pulsed the function generates a trip pulse if the calculated temperature exceeds the trip value Locked the function generates a trip signal if the calculated temperature exceeds the trip value It resets only if the temperature cools below the Unlock temperature Integer parameters Parameter name Title Unit Min Max Step Default Alarm Temperature TTR49L Alm IPar Alarm Temperature deg 60 200 1 80 Trip Temperature TTR49L Trip IPar Trip Temperature deg 60 200 1 100 Rated Temperature TTR49L Max IPar Rated Temperature deg 60 200 1 100 Base Temperature TTR49L Ref IPar Base Temperature deg 0 40 1 25 Unlock Temperature TTR49L Uni IPar Unlock Temperature deg 20 200 1 60 Ambient Temperature TTR49L Amb IPar Ambient Temperature deg 0 40 1 25 Startup Term TTR49L Str IPar Startup Term 0 60 1 0 Rated Load Current TTR49L Inom IPar Rated Load Current 20 150 1 100 Time constant TTR49L pT IPar Time Constant min 1 999 1 10 Table 7 The integer parameters of the line thermal protection function Boolean parameter Boolean para
54. eset parameter value At the end of the dead time reclosing is possible only if the circuit breaker can perform the command The conditions are defined by the user applying the graphic equation editor Reclosing is possible only if the conditions required by the synchro check function are fulfilled The conditions are defined by the user applying the graphic equation editor The HV automatic reclosing function waits for a pre programmed time for this signal This time is defined by the user If the SYNC Release signal is not received during the running time of this timer then the synchronous switch operation is started The separate function controls the generation of the close command in case of relatively rotating voltage vectors on both sides of the open circuit breaker to make contact at the synchronous state of the rotating vectors For this calculation the closing time of the circuit breaker must be defined When the close command is generated a timer is started to measure the Reclaim time If the fault is detected again during this time then the sequence of the HV automatic reclosing cycles continues If no fault is detected then at the expiry of the reclaim time the reclosing is evaluated as successful and the function resets If fault is detected after the expiry of this timer then the cycles restart with the first reclosing cycle If the manual close command is received during the running time of any of the cyc
55. et current values The voltage transformer supervision function can be activated if Live line status is detected for at least 200 ms This delay avoids mal operation at line energizing if the poles of the circuit breaker make contact with a time delay The function is set to be inactive if Dead line status is detected If the conditions specified by the selected mode of operation are fulfilled for at least 4 milliseconds then the voltage transformer supervision function is activated and the operation signal is generated When evaluating this time delay the natural operating time of the applied Fourier algorithm must also be considered NOTE For the operation of the voltage transformer supervision function the Dead line detection function must be operable as well it must be enabled by binary parameter setting and its blocking signal may not be active DVEZ_CONFIG_V1 1 doc 47 71 DVEZ Bay control unit configurations description If in the active state the conditions for operation are no longer fulfilled the resetting of the function depends on the mode of operation of the primary circuit e If the Live line state is valid then the function resets after approx 200 ms of time delay When evaluating this time delay the natural operating time of the applied Fourier algorithm must also be considered e If the Dead line state is started and the VTS Failure signal has been continuous for at least 1
56. f the current unbalance function Timer parameter Parameter name Title Unit Min Max Step Default Time delay VCB60_Del_TPar_ Time Delay msec 100 60000 100 1000 Table 74 The timer parameter of the current unbalance function 1 3 2 Control functions 1 3 2 1 Circuit breaker control function block CB1 Pol The Circuit breaker control function block can be used to integrate the circuit breaker control of the EuroProt device into the station control system and to apply active scheme screens of the local LCD of the device The Circuit breaker control function block receives remote commands from the SCADA system and local commands from the local LCD of the device performs the prescribed checking and transmits the commands to the circuit breaker It processes the status signals received from the circuit breaker and offers them to the status display of the local LCD and to the SCADA system Main features Local LCD of the device and Remote SCADA operation modes can be enabled or disabled individually The signals and commands of the synchro check synchro switch function block can be integrated into the operation of the function block Interlocking functions can be programmed by the user applying the inputs EnaOff enabled trip command and EnaOn enabled close command using the graphic equation editor Programmed conditions can be used to temporarily disable the operation of the function
57. ff On ByPass On Enabling disabling manual synchro switching SYN25 SwOperM EPar SynSW Man Off On On Energizing mode for manual switching le Off DeadBus LiveLine LiveBus DeadBus SYNES CC per PPa Pegg Man DeadLine Any energ case LiveLine Table 25 The enumerated parameters of the synchro check synchro switch function DVEZ_CONFIG_V1 1 doc 19 71 DVEZ Bay control unit configurations description Integer parameters Parameter name Title Unit Min Max Step Default Voltage limit for live line detection SYN25 LiveU IPar U Live 60 110 1 70 Voltage limit for dead line detection SYN25 DeadU IPar U Dead 10 60 1 30 Voltage difference for automatic synchro checking mode SYN25 ChkUdA IPar dl SynGheck ep 5 30 1 10 Voltage difference for automatic synchro switching mode SYN25 SwUdA IPar Udiff SynSW Auto 5 30 1 10 Phase difference for automatic switching SYN25 MaxPhDiffA IPar piaxPhaseDif deg 5 80 1 20 Voltage difference for manual synchro checking mode SYN25 ChkUdM IPar al SynCheck 5 30 1 10 Voltage difference for manual synchro switching mode SYN25 SwUdM IPar Udiff SynSW Man 5 30 1 10 Phase difference for manual switching SYN25 MaxPhDiffM IPar MaxPhaseDif deg 5 80 1 20 Table 26 The integer parameters of the synchro check synchro switch function Floating point parameters
58. fter the generation of the control command If the calculated Ucontrol voltage is outside the limits then timers are started In an emergency state of the network when the network elements are overloaded the Uset value can be driven to two lower values defined by the parameters Voltage Reduction 1 and Voltage Reduction 2 U Set is decreased by the parameter values if the binary inputs VRed 1 or VRed 2 enter into active state These inputs must be programmed graphically by the user DVEZ_CONFIG_V1 1 doc 35 71 DVEZ Bay control unit configurations description Time delay in automatic control mode In automatic control mode the first and every subsequent control command is processed separately For the first control command The voltage difference is calculated Udiff Ucontrol Uset If this difference is above the U Deadband value and depending on the setting of parameter T1 Delay Type three different timing modes can be selected e Definite this definite time delay is defined by parameter T1 e Inverse standard IDMT characteristic defined by the parameters o Ti maximum delay defined by the parameter o UDeadband isthe width of the permitted range in both and directions o Min Delay minimum time delay Tdelay aut minimum Min Delay Udead bane e 2powerN p IEE gt Tdelay Tl 2 Udeadbond The binary parameters Fast Lower Enable and or Fast Higher Enable
59. fundamental harmonic voltage component in phase L3 Voltage Ch U4 RMS value of the Fourier fundamental harmonic voltage component in Channel U4 Angle Ch U4 Phase angle of the Fourier fundamental harmonic voltage component in Channel U4 CT4 module Current Ch 11 RMS value of the Fourier fundamental harmonic current component in phase L1 Angle Ch 11 Phase angle of the Fourier fundamental harmonic current component in phase L1 Current Ch 12 RMS value of the Fourier fundamental harmonic current component in phase L2 Angle Ch 12 Phase angle of the Fourier fundamental harmonic current component in phase L2 Current Ch 13 RMS value of the Fourier fundamental harmonic current component in phase L3 Angle Ch 13 Phase angle of the Fourier fundamental harmonic current component in phase L3 Current Ch 14 RMS value of the Fourier fundamental harmonic current component in Channel 14 Angle Ch I4 Phase angle of the Fourier fundamental harmonic current component in Channel 14 Line measurement MXU L here the displayed information means primary value Active Power P Three phase active power Reactive Power Q Three phase reactive power Apparent Power S Three phase power based on true RMS voltage and current measurement Current L1 True RMS value of the current in
60. guration for solidly grounded networks DVEZ_CONFIG_V1 1 doc 64 71 DVEZ Bay control unit configurations description Measured value Explanation MXU_P_OLM__ Active Power P Fourier base harmonic value MXU Q OLM __ Reactive Power Q Fourier base harmonic value MXU S OLM Apparent Power S Fourier base harmonic value MXU 11 OLM Current L1 MXU 12 OLM Current L2 MXU 13 OLM Current L3 MXU Ut OLM _ Voltage L1 MXU U2 OLM _ Voltage L2 MXU U3 OLM _ Voltage L3 MXU U12 OLM _ Voltage L12 MXU U23 OLM _ Voltage L23 MXU U31 OLM __ Voltage L31 MXU f OLM __ Frequency Table 93 Example Measured values in a configuration for solidly grounded networks Another example is Figure 70 where the measured values available are shown as on line information in a configuration for compensated networks Line measurement Active Power P 1796719 kw Reactive Power Q 10414 57 k Ar Current L1 97 A Current L2 97 A Current L3 97 A Voltage L12 120 0 k Voltage L23 120 0 k Voltage L31 120 0 k Residual Voltage 0 0 k Frequency 50 00 Hz Figure 10 Example Measured values in a configuration for compensated networks The available quantities are described in the configuration description documents Reporting the measured values and the changes For reporting additional information is needed which is defined in parameter setting As an example in a configuration for so
61. he accelerated trip command The duration of the close command depends on preset parameter value Close command time but the close command terminates if any of the protection functions issues a trip command The MV automatic reclosing function can control up to four reclosing cycles Depending on the preset parameter values EarthFaults Rec Cycle and PhaseFaults Rec Cycle there are different modes of operation both for earth faults and for multi phase faults Disabled No automatic reclosing is selected 1 Enabled Only one automatic reclosing cycle is selected 1 2 Enabled Two automatic reclosing cycles are activated 1 2 3 Enabled Three automatic reclosing cycles are activated 1 2 3 4 Enabled All automatic reclosing cycles are activated The function can be switched Off On using the parameter Operation The user can also block the MV automatic reclosing function applying the graphic equation editor The binary status variable to be programmed is Block Depending on the preset parameter value Reclosing started by the MV automatic reclosing function can be started either by resetting of the TRIP command or by the binary signal indicating the open state of the circuit breaker If the reset state of the TRIP command is selected to start the MV automatic reclosing function then the conditions are defined by the user applying the graphic equation editor The binary status variable to be programmed is Aut
62. hnical data Function Value Accuracy Pick up starting accuracy lt 05 Blocking voltage lt 15 Reset time U lt Un 60 ms U lt 0 50 ms Operate time accuracy lt 20 ms Minimum operate time 50 ms Table 9 Technical data of the definite time overvoltage protection function Parameters Enumerated parameter Parameter name Title Selection range Default Enabling or disabling the overvoltage protection function TOV59 Oper EPar Operation Off On On Table 10 The enumerated parameter of the definite time overvoltage protection function Integer parameter Parameter name Title Unit Min Max Step Default Voltage level setting If the measured voltage is above the setting value the function generates a start signal TOV59_StVol_IPar_ Start Voltage 30 130 1 63 Table 11 The integer parameter of the definite time overvoltage protection function Boolean parameter Parameter name Title Default Enabling start signal only TOV59 StOnly BPar Start Signal Only FALSE Table 12 The boolean parameter of the definite time overvoltage protection function Timer parameter Parameter name Title Unit Min Max Step Default Time delay of the overvoltage protection function TOV59 Delay TPar Time Delay ms 0 60000 1 100 Table 13 The timer parameter of the definite time overvolt
63. ing accuracy lt 05 Blocking voltage lt 1 5 Reset time Us Un 50 ms Us 0 40 ms Operate time accuracy lt 20ms Minimum operate time 50 ms Table 14 Technical data of the definite time undervoltage protection function Parameters Enumerated parameter Parameter name Title Selection range Default Parameter for type selection TUV27_Oper_EPar_ Operation Off 1 out of 3 2 out of 3 All 1 out of 3 Table 15 The enumerated parameter of the definite time undervoltage protection function Integer parameters Parameter name Title Unit Min Max Step Default Starting voltage level setting TUV27 StVol IPar Start Voltage 30 130 1 52 Blocking voltage level setting TUV27 BIRVol IPar Block Voltage 0 20 1 10 Table 16 The integer parameters of the definite time undervoltage protection function Boolean parameter Parameter name Title Default Enabling start signal only TUV27 StOnly BPar Start Signal Only FALSE Table 17 The boolean parameter of the definite time undervoltage protection function Timer parameters Parameter name Title Unit Min Max Step Default Time delay of the undervoltage protection function TUV27 Delay TPar Time Delay ms 0 60000 1 100 Table 18 The timer parameter of the definite time undervoltage protection function DVEZ CONFIG V1 1 doc 16 71 DVEZ Bay control unit configurations description 1 3 1 4
64. l of the function are defined by the user applying the graphic equation editor Blocking signal of the voltage transformer supervision function for all voltage sources are defined by the user applying the graphic equation editor Signal to interrupt cancel the automatic or the manual switching procedure are defined by the user applying the graphic equation editor Technical data Function Effective range Accuracy in the effective range Rated Voltage Un 100 200V parameter setting Voltage effective range 10 110 of Un 1 of Un Frequency 47 5 52 5 Hz 10 mHz Phase angle 3 Operate time Setting value 3 ms Reset time lt 50 ms Reset ratio 0 95 Un Table 24 Technical data of the synchro check synchro switch function Parameters Enumerated parameters Parameter name Title Selection range Default Selection of the processed voltage SYN25 VoltSel EPar Voltage Select L1 N L2 N L3 N L1 L2 L2 L3 L3 L1 L1 N Operation mode for automatic switching SYN25 OperA EPar Operation Auto Off On ByPass On Enabling disabling automatic synchro svvitching SYN25 SwOperA EPar SynSW Auto Off On On Energizing mode for automatic switching La Off DeadBus LiveLine LiveBus DeadBus SYN25 EnOperA EPar Energizing Auto DeadLine Any energ case vel ne Operation mode for manual switching SYN25 OperM EPar Operation Man O
65. les then the HV automatic reclosing function resets DVEZ_CONFIG_V1 1 doc 22 71 DVEZ Bay control unit configurations description After a manual close command the HV automatic reclosing function does not operate for the time period defined by a parameter In case of evolving faults i e when a detected single phase fault changes to multi phase fault the behavior of the automatic reclosing function is controlled by the preset parameter value Evolving fault The options are Block Reclosing or Start 3Ph Rec Depending on binary parameter settings the automatic reclosing function block can accelerate trip commands of the individual reclosing cycles Technical data Function Accuracy Operating time 1 of setting value or 30 ms Table 29 Technical data of the rate of auto reclose function Parameters Enumerated parameters Parameter name Title Selection range Default Switching ON OFF the HV automatic reclosing function REC79_Op_EPar_ Operation Off On On Selection of the number of reclosing sequences Reclosing Disabled 1 Enabled 1 2 Enabled REG79 CycEn EPar cycles 1 2 3 Enabled 1 2 3 4 Enabled 1 Enabled Selection of triggering the dead time counter trip signal reset or circuit breaker open position Reclosing I REC79 St EPar Started by Trip reset CB open Trip reset Selection of behavior in case of evolving reclosing cycle fault blo
66. les 0 5 In 20 In 4194 1 digit with CT 1500 module 0 03 In 2 In 0 5 1 digit Voltage accuracy 5 150 of Un 0 5 of Un 1 digit Power accuracy I gt 5 In 3 1 digit Frequency accuracy a 2mHz Table 97 Technical data of line measurement DVEZ_CONFIG_V1 1 doc 69 71 DVEZ Bay control unit configurations description 1 3 4 Disturbance recorder The DVEZ configuration contains a disturbance recorder function The details are described in the document shown in Table 98 Name Title Document DRE Disturbance Rec Disturbance recorder function block description Table 98 Implemented disturbance recorder function The recorded analog channels Recorded analog signal Explanation UL1 Measured voltage of line 1 UL2 Measured voltage of line 2 UL3 Measured voltage of line 3 IL1 Measured current for all overcurrent protection functions in line 1 IL2 Measured current for all overcurrent protection functions in line 2 IL3 Measured current for all overcurrent protection functions in line 3 The recorded analog channels depend on the hardware configuration Table 99 Disturbance recorder recorded analog channels The recorded binary channels are identified by the User Recorded binary signal Explanation Table 100 Disturbance recorder recorded binary channels Enumerated parameter
67. lidly grounded networks the following parameters are available DVEZ_CONFIG_V1 1 doc 65 71 DVEZ Bay control unit configurations description Enumerated parameters Parameter name Title Selection range Default Selection of the reporting mode for active power measurement i Off Amplitude MXU PRepMode EPar Operation ActivePower Integrated Amplitude Selection of the reporting mode for reactive power measurement I Off Amplitude MXU QRepMode EPar Operation ActivePovver Integrated Amplitude Selection of the reporting mode for apparent power measurement Off Amplitude MXU_SRepMode_EPar_ Operation ApparPower Integrated Amplitude Selection of the reporting mode for current measurement Off Amplitude MXU IRepMode EPar Operation Current Integrated Amplitude Selection of the reporting mode for voltage measurement Off Amplitude MXU URepMode EPar Operation Voltage Integrated Amplitude Selection of the reporting mode for frequency measurement MXU fRepMode EPar Operation Frequency OE Amplitude Integrated Table 94 The enumerated parameters of the line measurement function The selection of the reporting mode items is explained in Figure 77 and in Figure 72 Amplitude mode of reporting If the Amplitude mode is selected for reporting a report is generated if the measured value leaves the deadband around the previou
68. lot P Slot R Slot 5 Slot T Slot U Slot PS CPU 2101 1201 MAR ST aS 1 SB z RELAY 4 RJ 45 BLA 2 3 Figure 2 Basic module arrangement of the El BCU configuration S4TE rear view Slot 4 Slot B Slot C Slot D Slot E Slot F Slot G Slot H Slot I Slot J Slot K Slot L Slot M Slot N Slot Slot P Slot R Slot 5 Slot T Slot U Slot CPU 2101 1201 MM ST x T SB 7 q ES hi hd o BLA 2 3 Figure 3 Basic module arrangement of the E2 BCU configuration S4TE rear view DVEZ CONFIG V1 1 doc 8 71 DVEZ Bay control unit configurations description Figure 4 Basic module arrangement of the El BCU configuration 42TE rear view CT CPU 5151 1201 Figure 5 Basic module arrangement of the E2 BCU configuration 42TE rear view 1 1 4 The applied hardware modules The technical specification of the device and that of the modules are described in the document Hardware description DVEZ CONFIG V1 1 doc 9 71 DVEZ Bay control unit configurations description 1 2 Meeting the device The basic information for working with the EuroProt devices are described in the document Quick start guide to the devices of the EuroProt product line Figure 6 The 84 inch rack of EuroProt family Figure 7 The 42 inch rack of EuroProt family DVEZ_CONFIG_V1 1 doc 10 71 DVEZ Bay con
69. lue for the phase to neutral voltage MXU UPhDeadB Deadband value FPar_ U ph N kV 0 1 100 0 01 1 Range value for the phase to neutral voltage MXU_UPhRange Range value FPar 9 4 GEN kV 1 1000 0 1 231 Deadband value for the phase to phase voltage MXU UPPDeadB Deadband value FPar_ U ph ph kV 0 1 100 0 01 1 Range value for the phase to phase voltage MXU_UPPRange Range value FPar g ii kV 1 1000 0 1 400 Deadband value for the current MXU fDeadB FPar Deadband value f Hz 0 01 1 0 01 0 02 Range value for the current MXU fRange FPar Range value f Hz 0 05 10 0 01 5 Table 95 The floating point parameters of the line measurement function DVEZ CONFIG V1 1 doc 67 71 DVEZ Bay control unit configurations description Amplitude Deadband pl A Value report report2 report3 Figure 11 Reporting if Amplitude mode is selected Integral mode of reporting If the Integrated mode is selected for reporting a report is generated if the time integral of the measured value since the last report gets becomes larger in the positive or negative direction then the deadband 1sec area As an example Figure 12 shows that the integral of the current in time becomes higher than the Deadband value multiplied by 1sec this results report2 etc Integrated Deadband pl A sec Value ISS or report1 report2 report3 report4
70. match the rated input of the device The role of the voltage input function block is to e set the required parameters associated to the voltage inputs e deliver the sampled voltage values for disturbance recording e perform the basic calculations o Fourier basic harmonic magnitude and angle o True RMS value e provide the pre calculated voltage values to the subsequent software modules e deliver the basic calculated values for on line displaying Operation of the voltage input algorithm The voltage input function block receives the sampled voltage values from the internal operating system The scaling even hardware scaling depends on parameter setting See the parameter VT4 Type EPar Range The options to choose from are 100V or 200V This parameter influences the internal number format and naturally accuracy A small voltage is processed with finer resolution if 100V is selected The connection of the first three VT secondary winding must be set to reflect actual physical connection The associated parameter is VT4 Ch13Nom EPar Connection U1 3 The selection can be Ph N Ph Ph or Ph N Isolated The Ph N option is applied in solidly grounded networks where the measured phase voltage is never above 1 5 Un In this case the primary rated voltage of the VT must be the value of the rated PHASE TO NEUTRAL voltage The Ph N option is applied in compensated or isolated networks where the measured phase voltage can be above 1 5 Un eve
71. meter Signal title Selection range Default Parameter for ambient temperature sensor application TTR49L Sens BPar Temperature Sensor No Yes No Table 8 The boolean parameter of the line thermal protection function DVEZ CONFIG V1 1 doc 14 71 DVEZ Bay control unit configurations description 1 3 1 2 Definite time overvoltage protection function TOV59 The definite time overvoltage protection function measures three voltages The measured values of the characteristic quantity are the RMS values of the basic Fourier components of the phase voltages The Fourier calculation inputs are the sampled values of the three phase voltages UL1 UL2 UL3 and the outputs are the basic Fourier components of the analyzed voltages UL1Four UL2Four UL3Four They are not part of the TOV59 function they belong to the preparatory phase The function generates start signals for the phases individually The general start signal is generated if the voltage in any of the three measured voltages is above the level defined by parameter setting value The function generates a trip command only if the definite time delay has expired and the parameter selection requires a trip command as well The overvoltaget protection function has a binary input signal which serves the purpose of disabling the function The conditions of disabling are defined by the user applying the graphic equation editor Tec
72. ms Current reset time 20 ms Table 58 Technical data of the breaker failure protection function DVEZ_CONFIG_V1 1 doc 41 71 DVEZ Bay control unit configurations description Parameters Enumerated parameters Parameter name Title Selection range Default Selection of the operating mode BRF50 Oper EPar Operation Off Current Contact Current Contact Current Switching on or off of the repeated trip command BRF50 ReTr EPar Retrip Off On On Table 59 The enumerated parameters of the breaker failure protection function Integer parameters Parameter name Title Unit Min Max Step Default Phase current setting BRF50 StCurrPh IPar Start Ph Current 20 200 1 30 Neutral current setting BRF50 StCurrN IPar Start Res Current 10 200 1 20 Table 60 The integer parameters of the breaker failure protection function Timer parameters Parameter name Title Unit Min Max Step Default Time delay for repeated trip command generation BRF50 TrDel TPar Retrip Time Delay msec 0 10000 1 200 Time delay for trip command generation for the backup circuit breaker s BRF50 BUDel TPar_ Backup Time Delay msec 60 10000 1 300 Trip command impulse duration BRF50 Pulse TPar Pulse Duration msec 0 60000 1 100 Table 61 The timer parameters of the breaker failure protection function DVEZ CONFIG V
73. n Current Ch 1 A secondary Fourier basic component of the current in channel IL1 Angle Ch 11 degree Vector position of the current in channel IL1 Current Ch 12 A secondary Fourier basic component of the current in channel IL2 Angle Ch 12 degree Vector position of the current in channel IL2 Current Ch 13 A secondary Fourier basic component of the current in channel IL3 Angle Ch 13 degree Vector position of the current in channel IL3 Current Ch 14 A secondary Fourier basic component of the current in channel 14 Angle Ch 14 degree Vector position of the current in channel 14 Table 87 The measured analogue values of the current input function NOTE1 The scaling of the Fourier basic component is such that if pure sinusoid 1A RMS of the rated frequency is injected the displayed value is 1A The displayed value does not depend on the parameter setting values Rated Secondary NOTE2 The reference of the vector position depends on the device configuration If a voltage input module is included then the reference vector vector with angle 0 degree is the vector calculated for the first voltage input channel of the first applied voltage input module If no voltage input module is configured then the reference vector vector with angle 0 degree DVEZ_CONFIG_V1 1 doc 59 71 DVEZ Bay control unit configurations description is the vector calculated for the first current input channel of the first ap
74. n in normal operation In this case the primary rated voltage of the VT must be the value of the rated PHASE TO PHASE voltage If phase to phase voltage is connected to the VT input of the device then the Ph Ph option is to be selected Here the primary rated voltage of the VT must be the value of the rated PHASE TO PHASE voltage This option must not be selected if the distance protection function is supplied from the VT input The fourth input is reserved for zero sequence voltage or for a voltage from the other side of the circuit breaker for synchron switching Accordingly the connected voltage must be identified with parameter setting VT4 Ch4Nom EPar Connection U4 Here phase to neutral or phase to phase voltage can be selected Ph N Ph Ph If needed the phase voltages can be inverted by setting the parameter VT4_Ch13Dir_EPar_ Direction U1 3 This selection applies to each of the channels UL1 UL2 and UL3 The fourth voltage channel can be inverted by setting the parameter VT4_Ch4Dir_EPar_ Direction U4 This inversion may be needed in protection functions such as distance protection differential protection or for any functions with directional decision or for checking the voltage vector positions DVEZ CONFIG V1 1 doc 61 71 DVEZ Bay control unit configurations description Additionally there is a correction factor available if the rated secondary voltage of the main voltage transformer e g 110V does not match the rated in
75. nchro check synchro switch function block description CB1Pol_SynTimOut_TPar_ Max SynChk time msec 10 5000 1 1000 Length of the time period to wait for the synchro switch function block description After this time the function resets no switchin switch impulse see synchro check synchro is performed CB1Pol_SynSWTimOut_ TPar Max SynSW time msec 0 60000 1 0 Duration of the waiting time between object selection and command selection At timeout no command is performed CBI Pol SBOTimeout SBO Timeout msec 1000 20000 1 5000 TPar If this parameter is set to 0 then the StartSW output is not activated Table 78 Timer parameters of the circuit breaker control function DVEZ_CONFIG_V1 1 doc 52 71 DVEZ Bay control unit configurations description Available internal status variable and command channel To generate an active scheme on the local LCD there is an internal status variable indicating the state of the circuit breaker Different graphic symbols can be assigned to the values See Chapter 3 2 of the document EuroCAP configuration tool for EuroProt devices Status variable Title Explanation Can be 0 Intermediate CB1Pol_stVal_Ist_ Status 1 Off 2 On 3 Bad The available control channel to be selected is Command channel Title Explanation Can be CB1Pol_Oper_Con_ Operation On Off
76. nt Diff an output is generated to the decision module The decision logic module combines the status signals to generate the starting signal and the trip command of the function The trip command is generated after the defined time delay if trip command is enabled by the Boolean parameter setting The function can be disabled by parameter setting and by an input signal programmed by the user with the graphic programming tool Technical data Function Value Accuracy Pick up starting accuracy at In lt 2 Reset ratio 0 95 Operate time 70 ms Table 70 Technical data of the current unbalance function Parameters Enumerated parameter Parameter name Title Selection range Default Selection of the operating mode VCB60_Oper_EPar_ Operation Off On On Table 71 The enumerated parameter of the current unbalance function Boolean parameter Parameter name Title Explanation Default Selection for trip command VCB60_StOnly_BPar_ Start Signal Only 0 to generate trip command 0 Table 72 The boolean parameter of the current unbalance function DVEZ_CONFIG_V1 1 doc 49 71 DVEZ Bay control unit configurations description Integer parameter Parameter name Title Unit Min Max Step Default Phase difference current setting VCB60 StCurr IPar Start Current Diff 10 90 1 50 Table 73 The integer parameter o
77. o check Live line live bus e Synchro switch Live line live bus If the conditions for Energizing check or Synchro check are fulfilled then the function generates the release command and in case of a manual or automatic close request the close command is generated If the conditions for energizing or synchronous operation are not met when the close request is received then synchronous switching is attempted within the set time out In this case the rotating vectors must fulfill the conditions for safe switching within the declared waiting time at the moment the contacts of the circuit breaker are closed the voltage vectors must match each other with appropriate accuracy For this mode of operation the expected operating time of the circuit breaker must be set as a parameter value to generate the close command in advance taking the relative vector rotation speed into consideration The started checking procedure can be interrupted by a cancel command defined by the user in the graphic equation editor In bypass operation mode the function generates the release signals and simply transmits the close command DVEZ_CONFIG_V1 1 doc 18 71 DVEZ Bay control unit configurations description The function can be started by the switching request signals initiated both the automatic reclosing and the manual closing The binary input signals are defined by the user applying the graphic equation editor Blocking signa
78. oReclosing Start If the open state of the circuit breaker is selected to start the MV automatic reclosing function then additionally to programming the AutoReclosing Start signal the conditions for detecting the open state of the CB are defined by the user applying the graphic equation editor DVEZ_CONFIG_V1 1 doc 26 71 DVEZ Bay control unit configurations description For all four reclosing cycles separate dead times can be defined for line to line faults and for earth faults The dead time counter of any reclosing cycle is started by the starting signal but starting can be delayed Reclosing is possible only if the conditions required by the synchro check function are fulfilled The conditions are defined by the user applying the graphic equation editor The HV automatic reclosing function waits for a pre programmed time for this signal This time is defined by the user If the SYNC Release signal is not received during the running time of this timer then the synchronous switch operation is started If no synchronous switching is possible then the MV automatic reclosing function resets In case of a manual close command which is assigned to the binary input Manual Close using graphic equation programming a preset parameter value decides how long the MV automatic reclosing function should be disabled after the manual close command The MV automatic reclosing function can be blocked by a binary input The c
79. ol unit configurations description 1 3 1 8 Over frequency protection function TOF81 The deviation of the frequency from the rated system frequency indicates unbalance between the generated power and the load demand If the available generation is large compared to the consumption by the load connected to the power system then the system frequency is above the rated value The over frequency protection function is usually applied to decrease generation to control the system frequency Another possible application is the detection of unintended island operation of distributed generation and some consumers In the island there is low probability that the power generated is the same as consumption accordingly the detection of high frequency can be one of the indication of island operation Accurate frequency measurement is also the criterion for the synchro check and synchro switch functions The accurate frequency measurement is performed by measuring the time period between two rising edges at zero crossing of a voltage signal For the acceptance of the measured frequency at least four subsequent identical measurements are needed Similarly four invalid measurements are needed to reset the measured frequency to zero The basic criterion is that the evaluated voltage should be above 30 of the rated voltage value The over frequency protection function generates a start signal if at least five measured frequency values are above the preset lev
80. onditions are defined by the user applying the graphic equation editor Technical data Function Accuracy Operating time 1 of setting value or 30 ms Table 33 Technical data of the auto reclosing protection function Parameters Enumerated parameters Parameter name Title Selection range Default Switching ON OFF the MV automatic reclosing function REC79 Op EPar Operation Off On On Selection of the number of reclosing sequences in case of earth faults REC79_EFCycEn_EPar EarthFault Disabled 1 Enabled 1 2 Enabled 1 Enabled RecCycle 1 2 3 Enabled 1 2 3 4 Enabled i Selection of the number of reclosing sequences in case of line to line faults REC79 PhFCycEn EPa PhaseFault Disabled 1 Enabled 1 2 Enabled 1 Enabled r RecCycle 1 2 3 Enabled 1 2 3 4 Enabled Selection of triggering the dead time counter trip signal reset or circuit breaker open position REC79_St_EPar_ Reclosing Started by Trip reset CB open Trip reset Table 34 The enumerated parameters of the auto reclosing protection function DVEZ_CONFIG_V1 1 doc 27 71 DVEZ Bay control unit co Timer parameters nfigurations description Parameter name Title Unit Min Max Ste Defaul p t
81. plied current input module Figure 8 shows an example of how the calculated Fourier components are displayed in the on line block See the document EuroProt Remote user interface description CT4 module Current Ch I1 0 84 A Angle Ch I1 9 deg Current Ch 12 0 84 A Angle Ch I2 129 deg Current Ch I3 0 85 A Angle Ch 13 111 deg Current Ch I4 0 00 A Angle Ch I4 0 deg Figure 8 Example On line displayed values for the current input module DVEZ_CONFIG_V1 1 doc 60 71 DVEZ Bay control unit configurations description 1 3 3 2 Voltage input function VT4 If the factory configuration includes a voltage transformer hardware module the voltage input function block is automatically configured among the software function blocks Separate voltage input function blocks are assigned to each voltage transformer hardware module A voltage transformer hardware module is equipped with four special intermediate voltage transformers See Chapter 6 of the EuroProt hardware description document As usual the first three voltage inputs receive the three phase voltages UL1 UL2 UL3 the fourth input is reserved for zero sequence voltage or for a voltage from the other side of the circuit breaker for synchron switching All inputs have a common parameter for type selection 100V or 200V Additionally there is a correction factor available if the rated secondary voltage of the main voltage transformer e g 110V does not
82. put of the device The related parameter is VT4 CorrFact IPar VT correction As an example if the rated secondary voltage of the main voltage transformer is 110V then select Type 100 for the parameter Range and the required value to set here is 110 These sampled values are available for further processing and for disturbance recording The performed basic calculation results the Fourier basic harmonic magnitude and angle and the true RMS value of the voltages These results are processed by subsequent protection function blocks and they are available for on line displaying as well The function block also provides parameters for setting the primary rated voltages of the main voltage transformer This function block does not need that parameter setting These values are passed on to function blocks such as displaying primary measured values primary power calculation etc Concerning the rated voltage see the instructions related to the parameter for the connection of the first three VT secondary winding Parameters Enumerated parameters Parameter name Title Selection range Default Rated secondary voltage of the input channels 100 V or 200V is selected by parameter setting no hardware modification is needed VT4 Type EPar Range Type 100 Type 200 Type 100 Connection of the first three voltage inputs main VT secondary Ph N Ph Ph VT4 Ch13Nom EPar
83. r_ Time Delay msec 100 60000 1 200 Table 41 The timer parameter of the over frequency protection function DVEZ_CONFIG_V1 1 doc 29 71 DVEZ Bay control unit configurations description 1 3 1 9 Underfrequency protection function TUF81 The deviation of the frequency from the rated system frequency indicates unbalance between the generated power and the load demand If the available generation is small compared to the consumption by the load connected to the power system then the system frequency is below the rated value The under frequency protection function is usually applied to increase generation or for load shedding to control the system frequency Another possible application is the detection of unintended island operation of distributed generation and some consumers In the island there is low probability that the power generated is the same as consumption accordingly the detection of low frequency can be one of the indications of island operation Accurate frequency measurement is also the criterion for the synchro check and synchro switch functions The accurate frequency measurement is performed by measuring the time period between two rising edges at zero crossing of a voltage signal For the acceptance of the measured frequency at least four subsequent identical measurements are needed Similarly four invalid measurements are needed to reset the measured frequency to zero The basic criterion is that
84. roProt hardware description document As usual the first three current inputs receive the three phase currents IL1 IL2 IL3 the fourth input is reserved for zero sequence current for the zero sequence current of the parallel line or for any additional current Accordingly the first three inputs have common parameters while the fourth current input needs individual setting The role of the current input function block is to e set the required parameters associated to the current inputs e deliver the sampled current values for disturbance recording e perform the basic calculations o Fourier basic harmonic magnitude and angle o True RMS value e provide the pre calculated current values to the subsequent software modules e deliver the basic calculated values for on line displaying Operation of the current input algorithm The current input function block receives the sampled current values from the internal operating system The scaling even hardware scaling depends on parameter setting See parameters CT4_Ch13Nom_EPar_ Rated Secondary 11 3 and CT4 Ch4Nom EPar Rated Secondary 14 The options to choose from are 1A or 5A in special applications 0 2A or 1A This parameter influences the internal number format and naturally accuracy A small current is processed with finer resolution if 1A is selected If needed the phase currents can be inverted by setting the parameter CT4_Ch13Dir_EPar_ Starpoint 11 3 This selection applie
85. s to each of the channels IL1 IL2 and IL3 The fourth current channel can be inverted by setting the parameter CT4_Ch4Dir_EPar Direction 14 This inversion may be needed in protection functions such as distance protection differential protection or for any functions with directional decision These sampled values are available for further processing and for disturbance recording The performed basic calculation results the Fourier basic harmonic magnitude and angle and the true RMS value These results are processed by subsequent protection function blocks and they are available for on line displaying as well The function block also provides parameters for setting the primary rated currents of the main current transformer This function block does not need that parameter setting These values are passed on to function blocks such as displaying primary measured values primary power calculation etc Technical data Function Range Accuracy Current accuracy 20 2000 of In 1 of In Table 84 Technical data of the current input DVEZ_CONFIG_V1 1 doc 58 71 DVEZ Bay control unit configurations description Parameters Enumerated parameters Parameter name Title Selection range Default Rated secondary current of the first three input channels 1A or 5A is selected by parameter setting no hardware modification is needed CT4_Chi3Nom_EPar_ Rated Secondary 11 3 1A 5A 1A Rated se
86. sly reported value As an example Figure 77 shows that the current becomes higher than the value reported in report PLUS the Deadband value this results report2 etc For this mode of operation the Deadband parameters are explained in Table 95 The Range parameters in Table 95 are needed to evaluate a measurement as out of range DVEZ_CONFIG_V1 1 doc 66 71 DVEZ Bay control unit configurations description Floating point parameters Parameter name Title Dim Min Max Step Default Deadband value for the active power MXU PDeadB FPar Deadband value P MW 0 1 100000 0 01 10 Range value for the active power MXU PRange FPar Range value P MVV 1 100000 0 01 500 Deadband value for the reactive povver MXU QDeadB FPar Peadbandvalue yar 01 100000 0 01 110 Range value for the reactive power MXU QRange FPar Range value Q MVAr 1 100000 0 01 500 Deadband value for the apparent power MXU SDeadB FPar Deadband value S MVA 0 1 100000 0 01 10 Range value for the apparent power MXU SRange FPar Range value S MVA 1 100000 0 01 500 Deadband value for the current MXU IDeadB FPar Deadband value A 1 2000 1 10 Range value for the current MXU IRange FPar Range value I A 1 5000 1 500 Deadband va
87. source for the rate of change of frequency calculation is an accurate frequency measurement In some applications the frequency is measured based on the weighted sum of the phase voltages The accurate frequency measurement is performed by measuring the time period between two rising edges at zero crossing of a voltage signal For the acceptance of the measured frequency at least four subsequent identical measurements are needed Similarly four invalid measurements are needed to reset the measured frequency to zero The basic criterion is that the evaluated voltage should be above 30 of the rated voltage value The rate of change of frequency protection function generates a start signal if the df dt value is above the setting value The rate of change of frequency is calculated as the difference of the frequency at the present sampling and at three periods earlier Time delay can also be set The function can be enabled disabled by a parameter The rate of change of frequency protection function has a binary input signal The conditions of the input signal are defined by the user applying the graphic equation editor The signal can block the rate of change of frequency protection function Technical data Function Effective range Accuracy Operating range 5 0 05 and 0 05 5 Hz sec Pick up accuracy 20 mHz sec Operate time min 140 ms Time delay 1
88. t current to die out than in the case of a three phase open state when no coupled voltage can sustain the fault current From other point of view in case of a transmission line connecting two power systems only a shorter dead time is allowed for the three phase open state because due to the possible power unbalance between the interconnected systems a large angle difference can be reached if the dead time is too long If only a single phase is open then the two connected healthy phases and the ground can sustain the synchronous operation of both power systems Special dead time can be necessary if a three phase fault arises near either substation of a line and the protection system operates without tele protection If the three phase dead time is too short the HV automatic reclosing may attempt to close the circuit breaker during the running time of the second zone trip at the other side Consequently a prolonged dead time is needed if the fault was detected in the first zone Dead time reduction may be applicable if healthy voltage is measured in all three phases during the dead time this means that no fault exists on the line In this case the expiry of the normal dead time need not be waited for a reclosing attempt can be initiated immediately If during the cycles the three phase dead time is applied once then all subsequent cycles will consider the three phase dead time settings too Three phase reclosing can be disabled by a pr
89. t the substation All binary alarm or warning signals of the substation can be handled in this configuration E2 BCU The configuration is designed to meet the requirements of a complex field control unit for transformer line or other bays The measurement functions are implemented as well The configuration can be supplemented with current and voltage based functions DVEZ_CONFIG_V1 1 doc 4 71 DVEZ Bay control unit configurations description Function scale Circuit breaker control included interlocking function Disconnector control included interlocking function Voltage measurement Current measurement Line measurement Average and maximum measurement Fuse failure protection VTS supervision Current unbalance protection Breaker failure protection Synchrocheck Automatic reclosing function for HV MV networks Automatic voltage regulator AVR tap change control Remote binary transmission Remote Binary Communication Circuit breaker wear Definite time overvoltage protection Residual overvoltage protection Definite time undervoltage protection Overfrequency protection Underfrequency protection Rate of change of frequency protection Load shedding Thermal protection Supervised trip contacts TCS Op Optional v If the HW permits then basic Table I The protection functions of the DVEZ configurations DVEZ_CONFIG_V1 1 doc 5 71 DVEZ Bay control unit configurations description
90. tage regulation is the application of transformers with on load tap changers When the transformer is connected to different taps its turns ratio changes and supposing constant primary voltage the secondary voltage can be increased or decreased as required Voltage control can take the actual load state of the transformer and the network into consideration As a result the voltage of a defined remote point of the network is controlled assuring that neither consumers near the busbar nor consumers at the far ends of the network get voltages out of the required range The voltage control function can be performed automatically or in manual mode of operation the personnel of the substation can set the network voltage according to special requirements The automatic tap changer controller function can be applied to perform this task The automatic tap changer controller function receives the following analog inputs UL1L2 Line to line voltage of the controlled secondary side of the transformer IL1L2 Difference of the selected line currents of the secondary side of the transformer for voltage drop compensation IHV Maximum of the phase currents of the primary side of the transformer for limitation purposes The parameter U Correction permits fine tuning of the measured voltage The function performs the following internal checks before control operation see Figure below e If the voltage of the controlled side UL1L2 is above the valu
91. the document Dead line detection protection function block description Technical data Function Value Accuracy Pick up voltage 1 Operation time lt 20ms Reset ratio 0 95 Table 65 Technical data of the dead line detection function Parameters Integer parameters Parameter name Title Unit Min Max Step Default Integer parameters of the dead line detection function DLD ULev IPar Min Operate Voltage 10 100 1 60 DLD ILev IPar Min Operate Current 2 100 1 10 Table 66 The integer parameters of the dead line detection function DVEZ CONFIG V1 1 doc 45 71 DVEZ Bay control unit configurations description DVEZ_CONFIG_V1 1 doc 46 71 DVEZ Bay control unit configurations description 1 3 1 15 Voltage transformer supervision function VTS60 The voltage transformer supervision function generates a signal to indicate an error in the voltage transformer secondary circuit This signal can serve for example as a warning indicating disturbances in the measurement or it can disable the operation of the distance protection function if appropriate measured voltage signals are not available for a distance decision The voltage transformer supervision function is designed to detect faulty asymmetrical states of the voltage transformer circuit caused for example by a broken conductor in the secondary circuit Another method for detecting voltage disturban
92. the evaluated voltage should be above 30 of the rated voltage value The under frequency protection function generates a start signal if at least five measured frequency values are below the setting value Time delay can also be set The function can be enabled disabled by a parameter The under frequency protection function has a binary input signal The conditions of the input signal are defined by the user applying the graphic equation editor The signal can block the under frequency protection function Technical data Function Range Accuracy Operate range 40 70 Hz 30 mHz Effective range 45 55 H2 55 65 Hz 2 mHz Operate time min 140 ms Time delay 140 60000 ms 20 ms Reset ratio 0 99 Table 42 Technical data of the under frequency protection function Parameters Enumerated parameter Parameter name Title Selection range Default Selection of the operating mode TUF81 Oper EPar Operation Off On On Table 43 The enumerated parameter of the under frequency protection function Boolean parameter Parameter name Title Default Enabling start signal only TUF81 StOnly BPar Start Signal Only FALSE Table 44 The boolean parameter of the under frequency protection function Float point parameter Parameter name Title Unit Min Max Digits Default Preset value of the comparison TUF81_St_FPar_ Start Frequency Hz 40 60 0 01 49
93. tion This is valid both for manual and automatic operation The tap changer supervision function receives the information about the tap changer position in six bits of the binary inputs BitO to Bit5 The value is decoded according to the enumerated parameter Code Type the values of which can be Binary BCD or Gray During switchover for the transient time defined by the parameter Position Filter the position is not evaluated The parameters Min Position and Max Position define the upper and lower limits In the upper position no further increasing command is generated and the output Max Pos Reached becomes active Similarly in the lower position no further decreasing command is generated and the output Min Pos Reached becomes active The function also supervises the operation of the tap changer Depending on the setting of parameter TC Supervision three different modes can be selected e TCDrive the supervision is based on the input TCRun In this case after command generation the drive is expected to start operation within one quarter of the value defined by the parameter Max Operating Time and it is expected to perform the command within Max Operating Time e Position the supervision is based on the tap changer position in six bits of the binary inputs BitO to Bit5 It is checked if the tap position is incremented in case of a voltage increase or the tap position is decrem
94. trol unit configurations description 1 3 Software configuration 1 3 1 Protection functions The implemented protection functions are listed in The applied functions depends on the HW and the User s request Table 4 The function blocks are described in details in separate documents These are referred to also in this table Name Title Document TTR49L Thermal overload Line thermal protection function block description TOV59 high Overvoltage Definite time overvoltage protection TOV59 low function block description TUV27 high Undervoltage Definite time undervoltage protection TUV27 low function block description TOV59N high Overvoltage Definite time zero sequence overvoltage TOV59N low protection function block description TOF81 high Overfrequency Overfrequency protection function block TOF81 low description TUF81 high Underfrequency Underfrequency protection function block TUF81 low description FRC81 ROC of frequency Rate of change of frequency protection function block description SYN25 Synchrocheck Synchro check synchro switch function block description REC79HV HV Autoreclosing Automatic reclosing function for high voltage networks function block description REC79MV MV autoreclosing Automatic reclosing function for medium voltage networks function block description VCB60 Current Unbalance Current unbalance function block description VTS60 Voltage tr
95. ule selects the maximal value of the three RMS phase currents The Thermal replica module solves the first order thermal differential equation using a simple step by step method and compares the calculated temperature to the values set by parameters The temperature sensor value proportional to the ambient temperature can be an input this signal is optional defined at parameter setting The function can be disblaed by parameter or generates a trip pulse if the calculated temperature exceeds the trip value or generates a trip signal if the calculated temperature exceeds the trip value given by a parameter but it resets only if the temperature cools below the Unlock temperature The line thermal protection function has two binary input signals The conditions of the input signal are defined by the user applying the graphic equation editor One of the signals can block the line thermal protection function the other one can reset the accumulated heat and set the temperature to the defined value for the subsequent heating test procedure DVEZ_CONFIG_V1 1 doc 13 71 DVEZ Bay control unit configurations description Technical data Function Accuracy Operate time at lx1 2 ltrip lt 3 or lt 20 ms Table 5 Technical data of the line thermal protection function Parameters Enumerated parameter Parameter name Title Selection range Default Parameter for mode of operation TTR49L_Op
96. values such as active and reactive power symmetrical components of voltages and currents These values are available as primary quantities and they can be displayed on the on line screen of the device or on the remote user interface of the computers connected to the communication network and they are available for the SCADA system using the configured communication system Reporting the measured values and the changes It is usual for the SCADA systems that they sample the measured and calculated values in regular time periods and additionally they receive the changed values as reports at the moment when any significant change is detected in the primary system The Line measurement function block is able to perform such reporting for the SCADA system Operation of the line measurement function block The inputs of the line measurement function are e the Fourier components and true RMS values of the measured voltages and currents e frequency measurement e parameters The outputs of the line measurement function are e displayed measured values e reports to the SCADA system NOTE the scaling values are entered as parameter setting for the Voltage transformer input function block and for the Current transformer input function block The measured values The measured values of the line measurement function depend on the hardware configuration As an example Table 93 shows the list of the measured values available in a confi
97. xposed to the same environmental conditions as the protected line itself The application of thermal protection of the overhead line is a better solution than a simple overcurrent based overload protection because thermal protection remembers the preceding load states of the line and the setting of the thermal protection does not need so a high security margin between the permitted current and the permitted continuous thermal current of the line In a broad range of load states and in a broad range of ambient temperatures this permits the better exploitation of the thermal and consequently current carrying capacity of the line The thermal differential equation to be solved is 1 TOR c ao 2 0 and the definition of the heat time constant is T dt T hA hA In this differential equation I t RMS heating current the RMS value usually changes over time R resistance of the line C specific heat capacity of the conductor m mass of the conductor 0 rise of the temperature above the temperature of the environment h heat transfer coefficient of the surface of the conductor A area of the surface of the conductor t time DVEZ_CONFIG_V1 1 doc 12 71 DVEZ Bay control unit configurations description The solution of the thermal differential equation for constant current is the temperature as the function of time the mathematical derivation of this equation is described in a separate document Ris 2

Bay control unit configuration description (Type: DVEZ)

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