Voltage related active power reduction

The voltage-dependent active power reduction reduces the active power of the power generating plant in the event of an overvoltage to prevent the overvoltage protection from responding. This function is required by EN standards.

Implementation is carried out via the ActiveByVoltage parameter group (see ActiveByVoltage). The characteristic curve is enabled via the Enable parameter. The switch-on threshold for triggering the reduction is defined by OvStrThres, the associated delay time via OvStrDelay.

As soon as the measured voltage exceeds the threshold and the delay has expired, the reduction curve is determined by the OvDroop factor in the active area of the characteristic curve. This determines the extent to which the active power is reduced depending on the overvoltage.