基于SVPWM光伏并网逆变器漏电流抑制研究  

Research of leakage current model for grid-connected inverter based on SVPWM modulation

作　　者：刘建科[1] 韩晨[2] 于克锐 陈永佳[2] 崔永宏[1] 张诚[1] 

机构地区：[1]陕西科技大学文理学院,陕西西安710021 [2]陕西科技大学电气信息与工程学院,陕西西安710021

出　　处：《可再生能源》2016年第9期1287-1292,共6页Renewable Energy Resources

基　　金：国家自然科学基金项目(51577110)

摘　　要：漏电流抑制是非隔离光伏并网系统需要解决的关键问题之一。为进一步改善漏电流的抑制效果,在充分考虑所有寄生参数的前提下,重点建立了非隔离型三相两电平光伏逆变器共模等效模型,分析了漏电流产生的原因,并基于SVPWM实现逆变控制,对采用不同开关方式下的漏电流进行分析对比。利用Matlab/simulink仿真验证了所建模型以及理论分析的正确性。Leakage current is one of the key issues which need to be solved in a non-isolated photovoltaic grid-connected inverter system. In order to further improve the effect of suppressing leakage current. Especially deriving a three-phase two-level high-frequency common-mode equivalent model with the all parasitic paramenters, Analyzing the reason of leakage current causes, and realizing inverter control based on the SVPWM modulation. Analyzing and comparing the l eakage current which are cased by different switch sequences. The correctness of the model and the theoretical analysis are tested and verified by Matlab/Simulink.

关 键 词：光伏并网逆变器 共模等效模型 寄生参数 SVPWM 开关方式 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程] TM615[电气工程—电力系统及自动化]