SMA SC 400HE - Manual (Page 48)

4 Sunny Central Control SMA Solar Technology AG
48 SC4-63HE-BE-BEN103280 Operating Manual
4.8 Reactive Power Regulation
4.8.1 Procedure for Regulating Reactive Power
The Sunny Central can supply reactive power if required by the distribution grid operator.
The distribution grid operator defines the used procedures and target values for this.
The "Q-VArMod" parameter is used to select the procedure for regulating reactive power. You use
the parameter to configure how the utility operator's parameters should be received and
implemented.
There are 11 different procedures for regulating reactive power:
Procedure Description
Off The reactive power target value is limited to 0 kVAr.
VArCtlCom The reactive power target value is received by the Sunny WebBox through
the Power Reducer Box and forwarded to the Sunny Central.
PFCtlCom The reactive power target value is received by the Sunny WebBox through
the Power Reducer Box and forwarded to the Sunny Central. A power
factor is transmitted as a target value.
VArCnst The "Q-VAr" parameter is used to set the reactive power target value
(in kVAr).
VArCnstNom The "Q-VArNom" parameter is used to set the reactive power target value
(in %).
VArCnstNomAnIn The reactive power target value is imported through an analog input.
The analog value is converted into a reactive power target value.
PFCnst The reactive power target value is set using a power factor.
PFCnstAnIn The reactive power target value is imported through the analog input for
specifying target values. The analog value is converted into a power
factor.
PFCtlW The power factor is set depending on the feed-in power. The dependency
is depicted by a parameterizable curve.
VArCtlVol Reactive power is set depending on the grid voltage. The parameterization
of this function depends on the medium voltage.
Parameter protection
This parameter may only be changed in the "Stop" operating state. The entry will not be
accepted in other operating states.