Research on Modelling and Verification for PV Power Plants with AVC System

Photovoltaic (PV) power generation has the characteristic property of inherent randomness and volatility, which will cause voltage fluctuation in the point of interconnection (POI). Therefore, the PV power station is required to provide the ability for regulating the voltage of the POI. In order to meet the dispatching requirements, PV power station needs to assemble the automatic voltage control (AVC) system, which can coordinated regulate all kinds of reactive power resource to realize voltage regulating function. The paper researches on the AVC system control strategy. With a PV power station in northwest as an example, this paper establishes the PV power station model installing the AVC system based on the DIgSILENT. Combining with the field measured data and simulation results, the accuracy of the PV power station model is verified.