Leakage Current Elimination of Four-Leg Inverter for Transformerless Three-Phase PV Systems

被引：123

作者：

Guo, Xiaoqiang ^{[1
]}

He, Ran ^{[1
]}

Jian, Jiamin ^{[1
]}

Lu, Zhigang ^{[1
]}

Sun, Xiaofeng ^{[1
]}

Guerrero, Josep M. ^{[2
]}

机构：

[1] Yanshan Univ, Dept Elect Engn, Key Lab Power Elect Energy Conservat & Motor Driv, Qinhuangdao 066004, Peoples R China

[2] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2016年 / 31卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Leakage current; pulse width modulation; three-phase four-leg inverter; transformerless photovoltaic system; GRID-CONNECTED INVERTER; FULL-BRIDGE TOPOLOGIES; VOLTAGE; FAMILY;

D O I：

10.1109/TPEL.2015.2477539

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Eliminating the leakage current is one of the most important issues for transformerless three-phase photovoltaic (PV) systems. In this paper, the leakage current elimination of a three-phase four-leg PV inverter is investigated. With the common-mode loop model established, the generation mechanism of the leakage current is clearly identified. Different typical carrier-based modulation methods and their corresponding common-mode voltages are discussed. A new modulation strategy with Boolean logic function is proposed to achieve the constant common-mode voltage for the leakage current reduction. Finally, the different modulation methods are implemented and tested on the TMS320F28335 DSP +XC3S400 FPGA digital control platform. The experimental results verify the effectiveness of the proposed solution.

引用

页码：1841 / 1846

页数：6

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