带续流开关的中点箝位型非隔离光伏逆变器

叶海云

叶海云.带续流开关的中点箝位型非隔离光伏逆变器[J].电测与仪表,2016,53(17):.
yehaiyun.A Neutral Point Clamped Non-isolated PV Inverter with a Freewheeling Switch[J].Electrical Measurement & Instrumentation,2016,53(17):.

带续流开关的中点箝位型非隔离光伏逆变器

A Neutral Point Clamped Non-isolated PV Inverter with a Freewheeling Switch

DOI：

中文关键词: 非隔离光伏逆变器共模电压漏电流箝位

英文关键词:non-isolated, PV inverter, common-mode voltage, leakage current, neutral point clamped

基金项目:江苏省创新工程科研实践计划（SJLX_0381）

作者中文名	作者英文名	单位
叶海云	yehaiyun	南京邮电大学

摘要点击次数: 1329

中文摘要:

摘要：为了满足非隔离光伏发电系统低漏电流的要求，提出了一种带续流开关的中点箝位型非隔离光伏逆变器。该拓扑在全桥逆变器的交流侧加入了一个续流开关，使得太阳能电池板输出端与电网断开，提高了非隔离光伏逆变器的转换效率。另一方面中点箝位电路的应用使得该拓扑在功率处理阶段和续流阶段的共模电压基本保持不变，降低了漏电流。本文详细分析了拓扑的工作原理，给出了其控制方法，并通过Saber仿真软件验证了带续流开关的中点箝位型非隔离光伏逆变器良好的共模特性。实验研制了一台300W的原理样机验证了理论分析的正确性及仿真方案的可行性。

英文摘要:

Abstract：In order to meet the requirement for common-mode leakage current in photovoltaic (PV) generation systems, a neutral point clamped non-isolated PV inverter with a freewheeling switch is proposed. A freewheeling switch is added in AC side of the full bridge inverter in this topology. That will improve the non-isolated PV inverter conversion efficiency because the freewheeling switch makes the output of the solar panels off the grid. On the other hand, common-mode voltage remains constant on power processing and freewheeling stage owing to the neutral point clamped circuit. The operational principle and controlling strategy were analyzed in this paper. It was proved that common-mode performance of the proposed topology was good by Saber simulation software. The proposed topology and strategy has been verified in a prototype rated at 300W.

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