Z-SOURCE PHOTOVOLTAIC GRID-CONNECTED INVERTER WITH COMMON-MODE LEAKAGE CURRENT INHIBITION

被引：0
|
作者：
Dai Y. [1 ,2 ]
Tang H. [1 ]
Liu M. [1 ]
Chen Y. [1 ]
Yan C. [1 ]
Yang X. [1 ]
机构：
[1] Intelligent Manufacturing Institute, Yibin Vocational and Technical College, Yibin
[2] School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2024年 / 45卷 / 03期
关键词：
grid connected; inverters; leakage current; photovoltaic power; Z-source;
D O I：
10.19912/j.0254-0096.tynxb.2022-1776
中图分类号：
学科分类号：
摘要：
The quasi-Z-source H-bridge grid-connected inverter（GCI）is well known as its no shoot-through problem and high efficiency of DC voltage，but the common-mode leakage current exists in the power frequency cycle. To solve the problems of quasi-Z-source H-bridge GCI，a new Z-Source photovoltaic grid-connected inverter（ZPGCI）with coupled cnductor coil topology is proposed. Also，a unipolar sinusoidal pulse width modulation （USPWM） strategy that can make the common- mode voltage constant is presented. Secondly，operating modes，common- mode leakage current and direct operating mode analysis shows that ZPGCI not only has the advantages of no shoot-through problem and high reliability，but also can eliminate the high-frequency common-mode leakage current of quasi- Z- source H- bridge GCI. At last，the correctness of the novel ZPGCI topology and theoretical analysis are verified by the comparison experiment of traditional quasi-Z-source H-bridge GCI and new ZPGCI circuit. © 2024 Science Press. All rights reserved.
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页码：517 / 522
页数：5
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