Impact of large‐scale photovoltaic generation integration structure on static voltage stability in China's Qinghai province network

Abstract

Large-scale photovoltaic (PV) generations are integrated into China's Qinghai province network and challenging the system stability. This study focuses on static voltage stability analysis of Qinghai grid in consideration of high-penetration PV generation. The test system is based on the practical network structure of Qinghai grid. Different practical PV integration structures are, respectively, studied by discussing the influences of transmission line length, output power of PV plant and reactive power compensation capacity on system static voltage stability. The authors also compared different PV integration structures to study the effect of topology on static voltage stability. Simulation results are performed in the practical network structure of Qinghai grid. The analysis results can be used to provide guidance for system modification and thereby improve the system operation stability.