SMA SUNNY CENTRAL 800CP XT - Page 7

Table of Contents
SMA Solar Technology AG
User Manual 7SCCPXT-E7-BA-en-58
10.2.2 Automatic Shutdown Functions ....................................................................................................................... 85
10.2.2.1 Grid Management Shutdown ........................................................................................................................ 85
10.2.2.2 Transformer Protection.................................................................................................................................... 85
10.2.2.3 Active Islanding Detection.............................................................................................................................. 85
10.2.2.4 Passive Islanding Detection ............................................................................................................................ 86
10.2.2.5 Behavior in Case of Increasing Temperatures .............................................................................................. 86
10.2.2.6 Switch-Off Function at Low Temperatures ..................................................................................................... 87
10.2.2.7 Low-Temperature Option................................................................................................................................ 87
10.2.3 Grounding and Insulation Monitoring............................................................................................................ 88
10.2.3.1 Mode of Operation ........................................................................................................................................ 88
10.2.3.2 GFDI ................................................................................................................................................................ 88
10.2.3.3 Remote GFDI................................................................................................................................................... 89
10.2.3.4 Insulation Monitoring Device ......................................................................................................................... 90
10.2.3.5 GFDI and Insulation Monitoring Device........................................................................................................ 91
10.2.3.6 Remote GFDI and Insulation Monitoring Device .......................................................................................... 92
10.3 Power Control.................................................................................................................................................. 93
10.3.1 Frequency-Dependent Active Power Limitation .............................................................................................. 93
10.3.2 Frequency-Independent Active Power Limitation............................................................................................ 94
10.3.2.1 No Active Power Limitation: Off Mode ......................................................................................................... 94
10.3.2.2 Active Power Limitation with Setpoint Command via Modbus Protocol: WCtlCom Mode ....................... 94
10.3.2.3 Active Power Limitation with Absolute Value: WCnst Mode........................................................................ 94
10.3.2.4 Active Power Limitation as a Percentage of Nominal Power: WCnstNom Mode...................................... 94
10.3.2.5 Active Power Limitation via Standard Signal: WCnstNomAnIn Mode ....................................................... 94
10.3.3 Reactive Power Control ................................................................................................................................... 95
10.3.3.1 No Reactive Power Control: Off Mode......................................................................................................... 95
10.3.3.2 Reactive Power Control with Setpoint Command via Modbus Protocol: VArCtlCom Mode..................... 95
10.3.3.3 Reactive Power Control with Setpoint Command via Modbus Protocol: PFCtlCom Mode ....................... 95
10.3.3.4 Reactive Power Control with Absolute Value: VArCnst Mode..................................................................... 95
10.3.3.5 Reactive Power Control as a Percentage of the Nominal Power: VArCnstNom Mode............................. 95
10.3.3.6 Reactive Power Setpoint via Standard Signal: VArCnstNomAnIn Mode ................................................... 95
10.3.3.7 Reactive Power Setpoint via Displacement Power Factor cos φ: PFCnst Mode ......................................... 96
10.3.3.8 Displacement Power Factor cos φ via Standard Signal: PFCnstAnIn Mode............................................... 96
10.3.3.9 Displacement Power Factor cos φ as a Function of Feed-In Power: PFCtlW Mode................................... 97
10.3.3.10 Reactive Power as a Function of the Grid Voltage: VArCtlVol Mode ......................................................... 98
10.3.3.11 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDb Mode ..................................................................................................................... 98
10.3.3.12 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDbA Mode .................................................................................................................. 101
10.3.4 Q at Night ........................................................................................................................................................102
10.3.4.1 No Q at Night: Off Mode ............................................................................................................................. 102
10.3.4.2 Q at Night with Operation Command via Modbus Protocol: VArCtlCom Mode...................................... 102
10.3.4.3 Q at Night with Absolute Value: VArCnst Mode.......................................................................................... 102
10.3.4.4 Q at Night as a Percentage of the Nominal Power: VArCnstNom Mode ................................................. 102
10.3.4.5 Q at Night via Standard Signal: VArCnstNomAnIn Mode ......................................................................... 102
10.3.4.6 Q at Night Depending on the Grid Voltage: VArCtlVol Mode................................................................... 103
10.3.4.7 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDb Mode ..................................................................................................................... 104
10.3.4.8 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDbA Mode .................................................................................................................. 106
10.3.5 Behavior in the Absence of Active and Reactive Power Setpoints................................................................107
10.4 Structure of the Communication Network......................................................................................................108
10.5 Grid Management Services............................................................................................................................110
10.5.1 Requirements for Grid Management Services ...............................................................................................110
10.5.2 Dynamic Grid Support (FRT) ...........................................................................................................................110
10.5.2.1 Full and Limited Dynamic Grid Support (FRT) ............................................................................................... 110
10.5.2.2 Grid Support in Case of Untervoltage (LVRT)............................................................................................... 111