隔离型光伏电站漏电流分析研究

Analysis and Research on Leakage Current of Isolated Photovoltaic Power Station

介绍漏电流的保护要求,对隔离型光伏电站进行等效和建模,并针对单台发电系统建立漏电流模型展开分析。针对漏电流中的各个成分分别提出对应的处理措施,如对直流分量进行抑制,对工频分量进行提取判断,对高频分量采用并联阻抗来降低漏电流。最后,通过MATLAB仿真计算与实验对比,验证了理论分析的正确性和处理措施的有效性,可为隔离型光伏电站的漏电流分析及处理提供参考。

The protection requirements of leakage current are introduced,the equivalent and modeling of isolated photovoltaic power plants are performed,and the leakage current model is established and analyzed for a single power generation system.Corresponding treatment measures are proposed for each component of the leakage current,such as suppressing the DC component,extracting and judging the fundamental component,and using parallel impedance for the high frequency component to reduce the leakage current.Finally,MATLAB simulation calculations and experimental comparisons verify the correctness of the theoretical analysis and the effectiveness of the treatment measures,and provide a reference for the leakage current analysis and treatment of isolated photovoltaic power plants.