H10 three-phase inverter with forward and reverse clamping circuit for leakage current suppression

被引：0

作者：

Ma H.-X. ^{[1
]}

Shao P.-C. ^{[1
]}

Lan Z.-X. ^{[1
]}

机构：

[1] School of Automation and Artificial Intelligence, Nanjing University of Posts and Telecommunications, Nanjing

来源：

Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2022年 / 26卷 / 11期

关键词：

clamping circuit; common-mode loop impedance; common-mode voltage; DC bus switch; leakage current; three-phase inverter;

D O I：

10.15938/j.emc.2022.11.010

中图分类号：

学科分类号：

摘要：

To address the leakage current problem in non-isolated PV power generation systems, two ten-switch three-phase inverter topology (H10 topology) named forward-clamped and reverse-clamped H10 inverters were proposed. Both of the topologies were obtained by adding two DC bus isolating switches and a clamping circuit to the traditional three-phase inverter topology, but the difference between the two topologies lies in the positions of the clamping switches in the clamping circuit. A general control strategy combining carrier modulation and logic operation for these two topologies was proposed. The control strategy allows the common-mode voltage of these two topologies to vary only between 1 / 3 and 2 / 3 of the dc input voltage, but the frequency of the common-mode voltage of the reverse-clamped inverter topology is three times that of the forward-clamped inverter topology, and the impedance of the common-mode loop increases significantly at highly frequency, so the leakage current suppression capability is more obvious. Finally, simulations of the two inverter systems and an experimental prototype with 200 W output power per phase were built to verify correctness of the theoretical analysis. © 2022 Editorial Department of Electric Machines and Control. All rights reserved.

引用

页码：95 / 103

页数：8

共 20 条

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