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System and method for leakage current suppression in a photovoltaic cascaded multilevel inverter
System and method for leakage current suppression in a photovoltaic cascaded multilevel inverter
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机译:用于光伏级联多电平逆变器中的泄漏电流抑制的系统和方法
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摘要
The cascaded multilevel inverter is considered to be a promising topology alternative for low-cost and high-efficiency photovoltaic (PV) systems. However, the leakage current issue, resulting from the stray capacitances between the PV panels and the earth, remains a challenge in the photovoltaic cascaded multilevel inverter application. The present invention presents leakage current suppression solutions for the PV cascaded multilevel inverter by introducing properly arranged and designed passive filters. The embodiments of the invention do not include an active semiconductor device, and as such, the leakage current suppression techniques of the present invention retain the simple structure of the cascaded inverter and do not complicate the associated control system.
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