SMA SC 500CP-US-10 600V - Manual (Page 61)

SMA America, LLC 8 Reactive Power Control
Operating Manual SCCP-US-BE-US_en-52 61
8.1.10 VArCtlVol Procedure
The reactive power is controlled depending on the line voltage. The reactive power setpoint is adjusted in stages.
Figure 24: Characteristic curve for reducing reactive power depending on line voltage
If the line voltage changes by the configurable voltage difference Q-VDif for the configurable duration of Q-VDifTm,
the reactive power target value is adjusted to the value Q-VArGr.
The parameterization of this function is based on the medium voltage.
8.1.11 VArCtlVolHystDb Procedure
By supplying reactive power, the inverter helps perform voltage-stabilizing measures in the event of overvoltage or
undervoltage. The parameterization is performed using a reactive power/voltage characteristic curve.
The characteristic curve can be configured flexibly by parameterizing the slope, a sort of "deadband" through two
voltage points and a hysteresis.
Contact the SMA Service Line before changing any parameters.
The VArCtlVol procedure may only be selected and configured after consultation with the SMA Service Line.
Parameters used Q-VDif
Q-VArGra
Q-VDifTm
Q-VRtgOfsNom
Contact the SMA Service Line before changing any parameters.
The VArCtlVolHystDb procedure may only be selected and configured after consultation with the
SMA Service Line.