Research on Clustering Equivalent Modeling of Large-Scale Photovoltaic Power Plants

There are dozens or hundreds of grid-connected inverters for large-scale photovoltaic power plants.In order to facilitate the study of the impact that large-scale photovoltaic power plants have on the power system while avoiding the need to establish a detailed model for each inverter,it is necessary to establish the equivalent model of large-scale photovoltaic power plants.Power generation units of the same type are combined by K-means clustering algorithm to reduce the simulation scale in number.According to the actual data of Shenmu large-scale grid-connected photovoltaic power station,employing RT-LAB software is used to conduct simulation verification and error analysis.The simulation results verify the proposed clustering equivalent modeling method is effective and can accurately track photovoltaic power station’s dynamic characteristics.