An Analysis on Output Characteristics of Photovoltaic Power Stations and Reactive Power Compensation Capacity

Abstract

After large-scale photovoltaic power access to power grid, the randomness of photovoltaic power output will cause voltage fluctuation, as well as a series of power quality problems, especially the impact on point of common coupling (PCC) voltage. This paper firstly establishes the mathematical model of PCC’s voltage deviation, theoretically analyzes the change of photovoltaic power station’s access site voltage with the change of photovoltaic power station output, and takes Qinghai power grid as an instance for a simulation study of reactive power compensation capacity and photovoltaic power output change’s influence on voltage and the correlation between photovoltaic output change and reactive compensation equipment tide.