Reduced Common-Mode Voltage in Z-Source Inverters

被引：0
|
作者：
Noroozi, N. [1 ]
Zolghadri, M. R. [1 ]
Yaghoubi, M. [1 ]
机构：
[1] Sharif Univ Technol, Dept Elect Engn, Tehran, Iran
来源：
2017 8TH POWER ELECTRONICS, DRIVE SYSTEMS & TECHNOLOGIES CONFERENCE (PEDSTC) | 2017年
关键词：
common-mode voltage; leakage current; Z-Source inverter; photovoltaic power system; modulated Fourier transform; TRANSFORMERLESS INVERTER;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Z-source family has been widespread in photovoltaic (PV) applications. In trasformerless grid-connected PV systems, the common mode voltage (CMV) time variations, cause the leakage current flow. This current flows through the stray capacitance of the PV panels. For a Z-Source Inverter (ZSI), the CMV would have higher high-frequency harmonics, due to the shoot through states within the switching cycles. In this paper, the CMV of a ZSI is analyzed and a simple method is proposed for the harmonic reduction of the CMV in the ZSI. The CMV reduction method is based on changing the switching states. The CMV in reduced method is compared to the CMV in the traditional ZSI in frequency domain by using modulated Fourier transform (MFT) method. The results are verified through the simulation of a 1kw ZSI.
引用
收藏
页码：413 / 418
页数：6
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