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

Content Provider	IEEE Xplore Digital Library
Author	Xiaoqiang Guo Ran He Jiamin Jian Zhigang Lu Xiaofeng Sun Guerrero, J.M.
Copyright Year	1986
Abstract	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.
Sponsorship	IEEE Power Electronics Society
Starting Page	1841
Ending Page	1846
Page Count	6
File Size	865940
File Format	PDF
ISSN	08858993
Volume Number	31
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2016-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Leakage currents Modulation Inverters Topology Photovoltaic systems Capacitors Phase transformers leakage current Transformerless photovoltaic system three-phase four-leg inverter pulse width modulation transformerless photovoltaic system Leakage current
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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