SMA SUNNY CENTRAL CP XT Series - Measures for Voltage Support through Parameterization of Reactive Power;Voltage Characteristic Curve: Varctlvolhystdb Mode

10 Function Description
SMA Solar Technology AG
User ManualSCCPXT-E7-BA-en-58104
If the grid 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.
10.3.4.7 Measures for Voltage Support through Parameterization of Reactive Power/
Voltage Characteristic Curve: VArCtlVolHystDb Mode
Consultation prior to parameter change
The parameters of this mode can only be selected or changed after consultation (see Section13 "Contact",
page153).
By supplying reactive power, the inverter performs 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.
Figure 35: Characteristic curve for reducing reactive power without deadband and without hysteresis