Stability Studies on PV Grid-connected Inverters under Weak Grid:A Review  

作　　者：Ming Li Xing Zhang Xinxin Fu Hua Geng Wei Zhao 

机构地区：[1]School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China [2]Department of Automation,Tsinghua University,Beijing 100084,China [3]Sungrow Power Supply Company Ltd.,Hefei 230088,China

出　　处：《Chinese Journal of Electrical Engineering》2024年第4期1-19,共19页中国电气工程学报(英文)

基　　金：Supported by the National Natural Science Foundation of China under Grants 52207211,U2166601,51937003,U23A20655;by the Fundamental Research Funds for the Central Universities under Grants JZ2024HGTB0259.

摘　　要：The integration of photovoltaic (PV) systems into weak-grid environments presents unique challenges to the stability of grid-connected inverters. This review provides a comprehensive overview of the research efforts focused on investigating the stability of PV grid-connected inverters that operate under weak grid conditions. Weak grids are characterized by a low short-circuit capacity and low inertia, making it essential to explore strategies that enhance the stability and performance of inverters in such challenging environments. This review covers various aspects, including control strategies and advanced technologies implemented to address stability problems. The research findings related to the impact of weak grid conditions on PV inverters, modeling techniques, and analysis results are discussed. Additionally, this review highlights emerging trends, identifies gaps in the current research, and suggests potential avenues for future investigations aimed at improving the stability of PV grid-connected inverters in weak grid scenarios.

关 键 词：Grid-following(GFL)control grid-forming(GFM)control photovoltaic(PV)grid-connected inverters weak grid 

分 类 号：TM614[电气工程—电力系统及自动化] TM464