SMA SC 500CP-US-10 600V - Manual (Page 68)

8 Reactive Power Control SMA America, LLC
68 SCCP-US-BE-US_en-52 Operating Manual
8.3.1.6 Q at Night Depending on the Line Voltage: VArCtlVol Procedure
The reactive power is configured as a function of the line voltage. The reactive power setpoint is adjusted in stages.
Figure 30: Characteristic curve for reducing reactive power as a function of the line voltage
If the line voltage is changed by the configurable voltage difference Q-VDif for the configurable duration of Q-VDifTm,
the reactive power setpoint will be adjusted by the value Q-VArGra.
The parameterization of this function refers to the medium voltage.
8.3.1.7 Measures for Voltage Support through Parameterization of Reactive Power/
Voltage Characteristic Curve: VArCtlVolHystDb Procedure
The provision of reactive power helps perform voltage-stabilizing measures in the event of overvoltage or undervoltage.
The parameterization is carried out by means of a reactive power/voltage characteristic curve. The characteristic curve
can be flexibly configured by parameterizing the slope, a type of deadband through two voltage points, and a hysteresis.
Contact the SMA Service Line before changing any parameters.
The SMA Service Line must be consulted prior to selection or configuration of the VArCtlVol mode.
Validity of parameters in feed-in operation and in Q at Night operation
The parameters used for this mode are also valid for the VArCtlVol mode in feed-in operation.
• Make sure that the parameter settings meet the requirements of the VArCtlVol mode in feed-in operation and
in Q at Night operation.
Parameters used Q-VDif
Q-VArGra
Q-VDifTm
Q-VRtgOfsNom
Contact the SMA Service Line before changing any parameters.
The SMA Service Line must be consulted prior to selection or configuration of the VArCtlVolHystDb mode.