Modulation Techniques to Reduce Leakage Current in Three-Phase Transformerless H7 Photovoltaic Inverter

被引：132
作者：
Freddy, Tan Kheng Suan [1 ,2 ]
Rahim, Nasrudin A. [1 ,3 ]
Hew, Wooi-Ping [2 ]
Che, Hang Seng [1 ]
机构：
[1] Univ Malaya, Power Energy Dedicated Adv Ctr UMPEDAC, Kuala Lumpur 59990, Malaysia
[2] Univ Malaya, Fac Engn, Dept Elect Engn, Kuala Lumpur 59990, Malaysia
[3] King Abdulaziz Univ, Jeddah 21589, Saudi Arabia
来源：
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2015年 / 62卷 / 01期
关键词：
Common-mode voltage (CMV); leakage current; photovoltaic (PV) system; transformerless; COMMON-MODE VOLTAGE; TOPOLOGIES;
D O I：
10.1109/TIE.2014.2327585
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Recently, reduced common-mode voltage (CMV) pulsewidth modulation (RCMV-PWM) methods have been proposed to reduce the leakage current in three-phase transformerless photovoltaic (PV) systems. However, most of these studies only focus on leakage current elimination and neglect the overall performance of the PV systems on issues such as cost, voltage linearity, dc-link current ripples, and harmonic distortion. In this paper, a three-phase transformerless inverter, adapted from the single-phase H5 topology, is investigated. Since the H5 topology has been conventionally developed for a single-phase system, its adaptation to the three-phase system requires the development of corresponding three-phase modulation techniques. Hence, modulation techniques are proposed based on conventional PWM. The performances of the proposed PWM, in terms of CMV, leakage current, voltage linearity, output current ripples, dc-link current ripples, and harmonic distortion are studied and discussed via simulation and experiment. It is proven that the proposed topology is able reduce the leakage current without sacrificing the overall performance of the system.
引用
收藏
页码：322 / 331
页数：10
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