非隔离型光伏并网逆变器漏电流分析

Analysis on Leakage Current of Non-isolated Photovoltaic Grid-connected Inverter

针对非隔离型光伏并网逆变器产生漏电流危害人身安全和设备稳定运行的问题,用数学的方式推导出漏电流产生的原因,阐述抑制漏电流的途径并对现有的两种抑制漏电流方法进行技术分析,通过PSIM平台搭建仿真,仿真结果证明了上述理论方法的可行性和正确性。

In order to solve the problem that leakage current of non-isolated photovoltaic grid-connected inverter endangers personal safety and stable operation of equipment,the mathematical deduction method is adopted to find out the causes of leakage current,the ways to restrain leakage current is expounded and two existing methods for suppressing leakage current are analyzed,and the feasibility and correctness of the above theoretical methods are demonstrated by simulation on PSIM platform.