Anti-blackout system for grid connected solar
Contents
1. Page 6 7 Nerever Notes Worldwide sales and service Switzerland Studer Innotec SA Rue des Casernes 57 1950 SION Switzerland Tel 027 205 60 80 Fax 027 205 60 88 STUDER Email info studer innotec com Web http www studer innotec com Limitation of responsibility The use of STUDER INNOTEC SA devices is the responsibility of the customer in all cases STUDER INNOTEC SA reserves the right to make any modification to the product without prior notification Page 7 7 Saroe Appendices Appendix 1 S Box scheme Power Appendix 2 S Box scheme Control Appendix 3 Scheme Compact series and S Box 25C E Appendix 4 Scheme Xtender series and S Box 25X E Appendix 5 Scheme Xtender three phase system Appendix 5 1 List of parts Appendix 5 2 Example of wiring Appendix 5 3 Description of the preset Solsafe Appendices geg Appendix 1 S Box scheme Power H oft Grid Consumption counter F11 1PN 25A Inverter Charger Grid inverter output output roo wen Ld Note If the ENG Module is required it replaces the connections of X4 Appendices Page 1 9 ai N JPE Grid Feeding counter Appendix 2 S Box scheme Control X1 N A CT 230AC 100 C23 KF 230AC Grid Consumption counter k1 ARM 01 k2 K13 K12 VIN A _ 100 C 23 K2. permits it At the bottom of the box are wired The wiring must be The wiring must be according to the local regulation to the local regulation Fuse holders F13 F14 and F15 and the terminals X1 X2 X3 X6 X7 and X8 The bars of support are not provided by Rittal The cables must be wired as close as possible to relays and contacts to leave a place for the ENS 31 Appendices Page 7 9 barigeny WW INEI GA Finally connect the ENS31 with particular attention to the order of phases Note that the neutral must be connected to the ENS31 otherwise the unit may be damaged All references for the ENS31 are in its user manual Here are added onto the middle bar the ENS31 relay s K10 1 and K10 2 and on the bottom bar the ENS31 fuse holder s F16 F17 and F18 It makes sense to put ENS31 before placing K10 1 and K10 2 to adjust the height of the central bar Then remove the ENS31 to facilitate wiring K10 1 and K10 2 and remplace it Bevery Appendices Page 8 9 Appendix 5 3 Description of the preset Solsafe for Xtender series Menu Combi Inverter Charger Param 1438 Solsafe system presence Yes Menu Inverter Param 1187 Stand by level 0 Auxiliary contact 1 1201 Load shedding when the battery is almost empty and load reconnected when battery back to 2 25V cell By default load shedding means Aux relay activated when battery ok Param 1202 Operating mode AUX 1 Value reversed auto
3. Application Note ous Anti blackout system for grid connected solar installations Solsafe concept brvven General description Minimal configuration The Solsafe concept is a system which will e Range of inverters automatically switch from a grid feeding inverter connected to the public grid to a backup grid powered by an inverter o All XPC serie charger o Compact Series o All C serie The installation of the Solsafe concept in a K o All HPC serie grid connected solar system enables to secure totally or partially the power supply o Xtender Series in case of a power cut and allows the use of solar power when the grid is off o All XTH serie o All XTM serie Features amp advantages Xtender e Backup system for grid connected solar EE i o Software vers 1 3 28 and higher e Grid feeding with solar inverter e RCC02 03 Only for Xtender series e Hassle free cabling quick installation o Software vers 1 3 32 and higher and easy commissioning with the Solsafe S Box o RCC User level Expert Application Schematic p ory d ecured Not secured VS DALONNI YJANLS OL 9 0 E A EOONV Figure 1 Solsafe concept with the Solsafe S Box Page 1 7 Detailed description The Solsafe concept The Solsafe concept is a backup system for grid connected solar installations This solution enables to secure totally or partially the power supply in case of a power cut and to keep on using the
4. Nc i 4PN 25A rT TETT i U 3 Battery a CC s ANANS bech j AC e e yA d e X6 Be utility hl counter e Pi i S N supply i Lg all ii Corp geen BS a Si RE of Y L D 3 1 ef SN ENS optional This drawing shows a working principle and PV array should not be considered as a wiring proposal gt e The local regulation should be respected In this scheme the inverter charger is a simple user of Sa zogen D eem 1 the grid and when the grid is present the battery es aaa 7 I Em es gets charged and maintenance comes from the s ee grid TBD To be defined for respect the local regulation Appendices Page 4 9 Appendix 5 Scheme Xtender three phase system CT 230VAC Uninterrupted AC grid 8 utility Utility counter A Light Grid demand A Refrigerator F11 4 Domotic ae A etc a F11 F12 K11 K12 K13 K14 TBD According to max current F12 utility counter supply PV array This drawing shows a working principle and r 1 ro qo 1 should not be considered as a wiring proposal Sen JK el Ren J The local regulation should be respected In this Re HE KC scheme the inverter charger is a simple user of es See er wm TZ 4 the grid and when the grid is present the battery a gets charged and maintenance comes from the 2 men n d grid TBD To be defined for respect the local regulation Appendices Page 5 9 App
5. cable of 5 meter ARM 01 SD card with Solsafe preset SD CARD SOLSAFE 1 Optional Optional ENS26 UFEgmbh ENS26 ENS31 UFEgmbh ENS31 Fuse block Woertz 4mm Grey B WOERTZ 4 FUSIBLE Fuse block Woertz 4mm Grey B WOERTZ 4 FUSIBLE Name of the kit Solsafe Kit Xtender Description Single phase Solsafe Kit with Xtender series Designation Studer reference Quantity Single phase breaker 25A DISJ MG MONO 25A C Installation relay 16A REL INSTAL 16A ae three phase Allen Bradley REL CONTACTEUR 3L 32A 230V 4 REL CONTACTEUR BLOC Mechanical lock block VERROU 2 Junction block Woertz 6mm Grey B WOERTZ 6 GRIS Junction block Woertz 6mm Blue B WOERTZ 6 BLEU 5 Junction block Woertz 6mm B WOERTZ 6 JAUNE VERT 5 Yellow Green B WOERTZ PAROI DE FERMETURE SD CARD SOLSAFE Closure for junction block Woertz ENS26 UFEgmbh ENS26 Fuse block Woertz 4mm Grey B WOERTZ 4 FUSIBLE Appendices Page 6 9 Asrigeny Appendix 5 2 Example of wiring The box The assembling Gg E KI m I 18 em Jem Box type 1448 500 400 X 400 X 200 www rittal ch Dale The distances between the bars of support must be respected so At the top of the box are wired all components of the system can fit in the box Relays K15 K14 K11 K12 and K13 and fuse holders F11 and A aa m This system can be connected in any electrical box whose size
6. solar production is sold to the grid No grid no solar production night time Secured loads supplied by the inverter charger No grid but solar production Secured loads are supplied by the solar production and if necessary by the inverter charger No grid but solar production Secured loads are supplied by the solar production The excess of the solar production is used to charge the battery No grid and battery voltage too low battery fully discharged Loads will stay disconnected until battery has recovered 25 capacity Grid present The charge of the battery is done from the grid The solar production is sold to the grid Relays descriptions K1 AUX 1 is always actuated until warning for LVD low voltage disconnection and actuated again when battery level is 50 K2 AUX 2 is actuated when the unit is in inverter mode no AC in with a battery voltage which isless than the absorption voltage and the temperature less than 65 C K14 is closed when the grid is present or when K11 is open K15 force K14 when the grid is present K12 and K13 are mechanically and electrically interlocked K11 and K14 are mechanically and electrically interlocked Page 4 7 herten Solsafe concept installation design and commissioning General information for Solsafe concept with Compact series This particular application requires a Compact XPC C or HPC driving the external auxiliary relay module ARM 01 The ARM 01 is a modu
7. F 230AC 100 23 KF 230AC Inverter Charger output Appendices Page 2 9 X3 N el 100 C23 KF 230AC Grid Feeding counter Appendix 3 Scheme Compact series and S Box 25C E CS ress A Be Unprotected N AC grid utility ee 8 counter Compact HPC XPC C xxx Utility demand inverter charger utility counter supply This drawing shows a working principle and By PV array should not be considered as a wiring proposal oe es The local regulation should be respected In this Dees Fu scheme the inverter charger is a simple user of the grid and when the grid is present the battery So E 1 gets charged and maintenance comes from the pS an a ER TBD To be defined for respect the local regulation Appendices Page 3 9 Solsafe S Box 25C E CT 230VAC m zZz v m KEENT OH SS Uninterrupted AC grid H Light A Domotic AL etc K11 K14 100 C23 KF 230VAC F11 F12 1PN 25A Refrigerator Appendix 4 Scheme Xtender series and S Box 25 X E TBD BEE A 0 mg L1 d d LC Unprotected Solsafe 8 Box 25X E gt d AC grid TBD X1 D CT 230VAC Uninterrupted i AC grid ZN uiy e 1 G un u d i Utility demand Xtender Refrigerator Grid _ ge inverter charger Domotic PE o PY o i b N PE ce gp Gu N 7 Ni vi z 9 PES 8 i or 2 8 a Lu M K14 K13 K13 K14 S F14 350mA 100 C23 KF 230VAC TBD xs X i F14 F12 lt
8. appendices ENS module When using the Solsafe concept the function impedance jumps or ENS on the grid inverter must be always turned off impedance of Page 5 7 inverter is not similar to the one of the grid 003 Thus if the function jumps impedance is mandatory it is required to add an external ENS module in the grid feeding path Studer Innotec recommends two ENS modules of the company UfE GmbH The ENS 26 for single phase system and the ENS 31 for three phase system The module ENS 26 is already included in the S Box type S Box 25C E and S Box 25X E System dimensioning Grid Inverter The power of the grid inverter can be freely chosen but the maximum output power should not be higher than the inverter charger nominal power Note that the wiring should be in accordance with the manufacturer s and local s prescriptions Battery Battery should be sized according to the backup time requirement but we recommend a minimum size of C10 2 5x Baden Inverter charger Compact series or Xtender series The inverter charger must be sized according to the maximum secured power For the Compact and Xtender series the stand by must be at 0 to work with the Solsafe system An ENS Module is used to connect decentralized electricity generators to the public electricity supply and in the event of faults in the mains supply the ENS Module interrupts the feeding of electricity of the monit
9. e the backup inverter supplies the consumers ei from the batteries Supply Ng K2 AUX2 K2 AUX2 is switched on the grid Solar energy is not necessary as long as the battery is full No grid and batteries partly charged Consumers e K1 AUX1 is in power cut Xtender Series d mode the consumers are EI P supplied by the backup C AUX 1 inverter batteries and or ee solar energy K2 AUX2 is switched on the backup grid Solar energy is used for supplying the consumers and or the batteries Bi directional output of inverters K2 AUX 2 No grid and batteries Consumers mm wm mm mm em a SE wn V e K1 AUX1 is in bypass el A p Ki AUX 1 mode and disconnects completely the consumers It will switch back in power a cut mode when the battery gt oP Spins will recover a partial BER charged level K2 AUX2 is switched on the backup grid Solar energy is used for charging the battery PV Wind generator k1 2 are for Compact series and AUX1 2 are for Xtender Series Page 3 7 herten Solsafe system behavior example The graph below shows in detail the behavior of the Solsafe system in every possible case Secured loads Battery 27 2 voltage 26y 22V Secured loads d Solar power Il power Grid 28 8 AC CT General descriptions Grid present and battery in floating phase The
10. endix 5 1 List of parts The various components listed below are available in kit form at Studer Innotec Name of the kit Solsafe Kit Compact Name of the kit Solsafe Kit Xtender_3ph Single phase Solsafe Kit with Compact series Three phase Solsafe Kit with Xtender series Studer reference Quantity Designation Studer reference Quantity Single phase breaker 25A DISJ MG MONO 25A C 2 Three phase breaker 25A DISJ MG TRI 25A C Installation relay 16A REL INSTAL 16A 1 Installation relay 16A REL INSTAL 16A Contactor three phase Allen Bradle R E 32A H y REL CONTACTEUR 3L 32A 230V 4 oa three phase Allen Bradley REL CONTACTEUR 3L 32A 230V REL CONTACTEUR BLOC Mechanical lock block for contactor VERROU 2 Mechanical lock block n BLOC 2 Junction block Woertz 6mm Grey B WOERTZ 6 GRIS Junction block Woertz 6mm Grey B WOERTZ 6 GRIS Junction block Woertz 6mm Blue B WOERTZ 6 BLEU 5 Junction block Woertz 6mm Blue B WOERTZ 6 BLEU B WOERTZ 6 JAUNE VERT 5 unction block Woertz 6mm en E Yellow Green Yellow Green B WOERTZ 6 JAUNE VERT SE B WOERTZ PAROI DE z DE Closure for junction block Woertz FERMETURE Closure for junction block Woertz ee ETRE Ges Fuse block Woertz 4mm Grey B WOERTZ 4 FUSIBLE Fuse block Woertz 4mm Grey B WOERTZ 4 FUSIBLE Locking block 6 6 Grey B BUTEE PLASTIQUE Locking block 6 6 Grey B BUTEE PLASTIQUE ARM 01 module incl
11. ing inverters SolarMax Fronius e lt ensures that no grid feeding from the battery is possible Page 2 7 The Solsafe system can be fully wired by the installer In that case Studer is only supplying the inverter charger Xtender or Compact series and the ARM 01 Module for Compact series only The wiring schematics for the Solsafe system and Solsafe three phase system are at disposal in the appendices available at the end of this document Solsafe S Box For the Solsafe system a cabling solution exists the S Box The S Box offers e Hassle free cabling e Quick installation e Easy commissioning a Figure 2 S Box The S Box can be supplied in 4 versions e S Box 25A for Compact Series S Box 25C e S Box 25A for Xtender Series S Box 25X e S Box 25A with ENS Module for Compact Series S Box 25C E e S Box 25A with ENS Module for Xtender Series S Box 25X E Solsafe concept situations The Solsafe concept can be described by these four different situations Consumers i Compactor stender Series N ch The grid is present es te KI AUX 1 K1 AUX1 is in bypass mode K2 AUX2 is switched on the grid feeding grid The grid charges the batteries 7 KO3IAUN Consumers 7 S Public grid ae No grid and batteries Demand Compact or foe Xtender Series Ki fully charged e el Z i i K1 AUX 1 K1 AUX1 is in power cut a ZS i Li mod
12. le consisting of 4 auxiliary relays to use only with the Compact series The K1 and K2 relays have a dedicated function to the Solsafe application The K3 relay is not used and the K4 relay is a replication of the auxiliary contact of the inverter charger and can be programmed for particular applications This module is already included in the S Box type S Box 25C Using the S Box type S Box 25C will greatly facilitate the wiring of Solsafe system General information for Solsafe concept with Xtender series This particular application requires an Xtender XTH or XTM with auxiliary contact AUX1 and AUX2 specifically programmed to drive the contactor of the source switch over The specific programming is done by loading the preset Solsafe available in the libraries of predefined parameters see the programming guide on the next page for more information Using the S Box type S Box 25X will greatly facilitate the wiring of Solsafe system General information for the Solsafe concept with Xtender three phase system This particular application requires 3 Xtender XTH or XTM with auxiliary contact AUX1 and AUX2 specifically programmed to drive the contactor of the source switch over Note that Studer Innotec does not supply pre wired S Box for three phase systems But it is possible to order all the necessary equipment at Studer Innotec List of equipment preset Solsafe and information on the assembly are available in
13. matic Param 1497 Combination of the events the auxiliary contact 1 Value Any Function OR Menu 1245 Active in function of the battery voltage AUX 1 Param 1288 Use of dynamic compensation of battery level AUX 1 Yes Param 1246 Battery voltage 1 activate AUX 1 Yes Param 1247 Battery voltage 1 AUX 1 11 6 23 2 46 4 VDc Param 1248 Delay 1 1min Param 1249 Battery voltage 2 activate AUX 1 Yes Param 1250 Battery voltage 2 AUX 1 12 24 48 VDc Param 1251 Delay 2 10min Param 1252 Battery voltage 3 activate AUX 1 Yes Param 1253 Battery voltage 3 AUX 1 12 2 24 3 48 6 VDc Param 1254 Delay 3 30min Param 1255 Battery voltage level to deactivate AUX 1 13 5 27V 54 VDc Param 1256 Delay to deactivate AUX 1 60min Param 1516 Deactivate if battery in floating phase AUX1 No Warning None of the other parameters present in relay AUX1 menu should be changed Auxiliary contact 2 1310 Condition to have the grid inverter re directed at the output of the Xtender By default disconnected Param Param 1311 Operating mode AUX 2 Value automatic 1498 Combination of the events the auxiliary contact 2 Value All Function AND Menu 1456 Contact active on event only theses parameters Param Param Param Param Param Param Param Param 1340 Inverter active Yes 1519 Xtender ON AUX 2 Yes 1521 No over temperature no ove
14. ored phase into the mains to prevent an islanding effect The following deviations are monitored e overvoltage and undervoltage e frequency deviation e impedance jumps These instructions are directly extracted from Chapter 2 1 of Module ENS manual of the company UfE GmbH More information available on www ufegmbh de Grid inverter manufacturer will give the procedure to deactivate the function impedance jumps geg RCC 02 03 programming guide Go to Expert level Remote controller setting Di Press SET and search with User level 5012 Pres SET and insert the code 426468 Press SET Your level is EXPERT i The code is available in the user manual RCC 02 03 Load preset Solsafe Remote controller setting Di Press SET and search with f Save and restore files 5013 Press SET and search with A i Advanced backup functions 5069 Press SET and search with A i Save and restore Xtender files 5050 Press SET and search with Load Xtender parameters preset 5045 Press SET and choose the preset Solsafe with A and press SET to validate Wait until the preset is installed Only for Solsafe concept with Xtender series and Solsafe concept with Xtender three phase system i Preset Solsafe description available in the appendices
15. rload no transformer over temperature Yes 1333 Xtender OFF AUX 2 No 1334 Battery undervoltage AUX 2 No 1335 Battery overvoltage AUX 2 No 1336 Inverter or Smart Boost overload AUX 2 No 1337 Overtemperature AUX 2 No Menu 1353 Active in function of the of battery voltage AUX 2 Param Param Param Param Param Param 1354 Use of dynamic compensation of battery level AUX 2 Yes 1355 Battery voltage 1 activate AUX 2 Yes 1356 Battery voltage 1 AUX 2 13 26V 52 VDc 1357 Delay 1 5min 1364 Battery voltage level to deactivate AUX 2 14 28V 56 VDc 1365 Delay to deactivate AUX 2 Omin Warning None of the other parameters present in relay AUX2 menu should be changed Appendices Page 9 9 hs TUGER
16. solar energy being produced Note that all inverter chargers of Studer Innotec are bi directional This allows integrating any of them into the Solsafe concept bw bi d A RID n bw A 1 y y lt N LE 7 Ai E a o _ yo i gt Figure 3 Solsafe concept Compared to other similar solutions the Solsafe concept offers the following advantages e It allows a great flexibility by choosing independently the grid feeding power matching the solar generator and the stand alone power matching the peak consumption of the user e The grid feeding inverter can be chosen with high voltage input range lowering wiring costs e The wiring can be optimized by placing the grid feeding inverter near the solar field e t allows a possible upgrade of existing grid connected installations e The inverter charger allows a fast charge from the grid important in case of frequent power cuts hindering a complete charge of the battery e The power available in case of islanding is added inverter charger Pnom grid feeding instantaneous power e Its allows an upgrade of existing stand alone installations that are connected to the grid afterwards adding value to the investment e t standardizes the amount of products to maintain and makes the staff training easier this concept can be implemented with all our combis XTH XTM XPC Compact and HPC e It allows to work with standard grid feed
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