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

Xiaoqiang Guo, Ran He, Jiamin Jian, Zhigang Lu, Xiaofeng Sun, Josep M. Guerrero

Publikation: Bidrag til tidsskriftLetterpeer review

82 Citationer (Scopus)
1695 Downloads (Pure)

Abstrakt

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.
OriginalsprogEngelsk
TidsskriftI E E E Transactions on Power Electronics
Vol/bind31
Udgave nummer3
Sider (fra-til)1841-1846
Antal sider6
ISSN0885-8993
DOI
StatusUdgivet - mar. 2016

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