13.3.2.1 No Active Power Limitation: Off Mode.......................................................................................................... 191
13.3.2.2 Active Power Limitation with Setpoint Command via Modbus Protocol: WCtlCom Mode ........................ 191
13.3.2.3 Active Power Limitation with Absolute Value: WCnst Mode ........................................................................ 191
13.3.2.4 Active Power Limitation as a Percentage of Nominal Power: WCnstNom Mode ...................................... 191
13.3.2.5 Active Power Limitation via Standard Signal: WCnstNomAnIn Mode ........................................................ 192
13.3.3 Reactive Power Control ...................................................................................................................................192
13.3.3.1 No Reactive Power Control: Off Mode ......................................................................................................... 192
13.3.3.2 Reactive Power Control with Setpoint Command via Modbus Protocol: VArCtlCom Mode...................... 192
13.3.3.3 Reactive Power Control with Setpoint Command via Modbus Protocol: PFCtlCom Mode........................ 192
13.3.3.4 Reactive Power Control with Absolute Value: VArCnst Mode...................................................................... 192
13.3.3.5 Reactive Power Control as a Percentage of the Nominal Power: VArCnstNom Mode ............................. 192
13.3.3.6 Reactive Power Setpoint via Standard Signal: VArCnstNomAnIn Mode .................................................... 193
13.3.3.7 Reactive Power Setpoint via Displacement Power Factor cos φ: PFCnst Mode .......................................... 193
13.3.3.8 Displacement Power Factor cos φ via Standard Signal: PFCnstAnIn Mode................................................ 194
13.3.3.9 Displacement Power Factor cos φ as a Function of Feed-In Power: PFCtlW Mode.................................... 195
13.3.3.10 Reactive Power as a Function of the Grid Voltage: VArCtlVol Mode.......................................................... 195
13.3.3.11 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDb Mode...................................................................................................................... 196
13.3.3.12 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDbA Mode ................................................................................................................... 199
13.3.4 Q at Night ........................................................................................................................................................200
13.3.4.1 No Q at Night: Off Mode .............................................................................................................................. 200
13.3.4.2 Q at Night with Operation Command via Modbus Protocol: VArCtlCom Mode....................................... 200
13.3.4.3 Q at Night with Absolute Value: VArCnst Mode .......................................................................................... 200
13.3.4.4 Q at Night as a Percentage of the Nominal Power: VArCnstNom Mode .................................................. 200
13.3.4.5 Q at Night via Standard Signal: VArCnstNomAnIn Mode .......................................................................... 200
13.3.4.6 Q at Night Depending on the Grid Voltage: VArCtlVol Mode.................................................................... 201
13.3.4.7 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDb Mode...................................................................................................................... 202
13.3.4.8 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDbA Mode ................................................................................................................... 205
13.3.5 Behavior in the Absence of Active and Reactive Power Setpoints................................................................206
13.4 Structure of the Communication Network.......................................................................................................206
13.5 Grid Management Services.............................................................................................................................208
13.5.1 Dynamic Grid Support (FRT) ...........................................................................................................................208
13.5.1.1 Full and Limited Dynamic Grid Support (FRT)................................................................................................ 208
13.5.1.2 Grid Support in Case of Untervoltage (LVRT)................................................................................................ 208
13.5.1.3 Dynamic Undervoltage Detection................................................................................................................... 209
13.5.1.4 Grid Support in the Event of Overvoltage (HVRT)......................................................................................... 210
13.6 Cascade Control ..............................................................................................................................................211
13.7 Grid Protection..................................................................................................................................................212
13.8 Low-Voltage Meter ...........................................................................................................................................212
13.9 Zone Monitoring...............................................................................................................................................213
14 Operating Data and Parameters ................................................................................................214
14.1 Operating Data ................................................................................................................................................214
14.1.1 Inverter..............................................................................................................................................................214
14.1.1.1 Power Limitation............................................................................................................................................... 214
14.1.1.2 Error Channels ................................................................................................................................................. 216
14.1.1.3 Measured Values............................................................................................................................................. 217
14.1.1.4 Internal Device Values..................................................................................................................................... 217
14.1.1.5 Internal Meters................................................................................................................................................. 217
14.1.1.6 Service-Relevant Displays................................................................................................................................ 218
14.1.2 Sunny Central String-Monitor Controller ........................................................................................................218
Table of Contents
SMA Solar Technology AG
System ManualMVPS22JP-SH-en-1110
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