Leakage current analysis of single-phase transformer-less grid-connected PV inverters

Lin Ma; Tamas Kerekes; Remus Teodorescu; Fen Tang; Xinmin Jin; Yibin Tong; Jingzhe Liang

doi:10.1109/IECON.2015.7392211

Leakage current analysis of single-phase transformer-less grid-connected PV inverters

Lin Ma, Tamas Kerekes, Remus Teodorescu, Fen Tang, Xinmin Jin, Yibin Tong, Jingzhe Liang

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

6 Citations (Scopus)

Abstract

Transformer-less string PV inverter is getting more and more widely utilized due to its higher efficiency, smaller volume and weight. However, without the galvanic isolation, the leakage current limitation and operation safety became the key issues of transformer-less inverters. This paper simplifies the leakage current generation circuit model and presents a leakage current estimation method both in real time and frequency domain. It shows that the leakage current is related to the circuit stray parameters, output filter and common mode voltage. Furthermore, with the proposed analysis method, the leakage current generation of H-bridge with different modulation methods and HERIC inverter are discussed individually. At last, the presented method has been verified via simulation.

Original language	English
Title of host publication	Proceedings of the 41st Annual Conference of the IEEE Industrial Electronics Society : IECON 2015
Number of pages	6
Publisher	IEEE Press
Publication date	2016
Pages	887-892
Article number	7392211
ISBN (Print)	978-1-4799-1761-7
ISBN (Electronic)	978-1-4799-1762-4
DOIs	https://doi.org/10.1109/IECON.2015.7392211
Publication status	Published - 2016
Event	41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015 - Yokohama, Japan Duration: 9 Nov 2015 → 12 Nov 2015

Conference

Conference	41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015
Country/Territory	Japan
City	Yokohama
Period	09/11/2015 → 12/11/2015
Sponsor	IEEE Industrial Electonics Society (IES)

Keywords

Common mode leakage current
Common mode voltage
Grid-connected photovoltaic inverter
Transformer-less

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10.1109/IECON.2015.7392211

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@inproceedings{35c4dafedd664e58bafa614d9c03a4c2,

title = "Leakage current analysis of single-phase transformer-less grid-connected PV inverters",

abstract = "Transformer-less string PV inverter is getting more and more widely utilized due to its higher efficiency, smaller volume and weight. However, without the galvanic isolation, the leakage current limitation and operation safety became the key issues of transformer-less inverters. This paper simplifies the leakage current generation circuit model and presents a leakage current estimation method both in real time and frequency domain. It shows that the leakage current is related to the circuit stray parameters, output filter and common mode voltage. Furthermore, with the proposed analysis method, the leakage current generation of H-bridge with different modulation methods and HERIC inverter are discussed individually. At last, the presented method has been verified via simulation.",

keywords = "Common mode leakage current, Common mode voltage, Grid-connected photovoltaic inverter, Transformer-less",

author = "Lin Ma and Tamas Kerekes and Remus Teodorescu and Fen Tang and Xinmin Jin and Yibin Tong and Jingzhe Liang",

year = "2016",

doi = "10.1109/IECON.2015.7392211",

language = "English",

isbn = "978-1-4799-1761-7",

pages = "887--892",

booktitle = "Proceedings of the 41st Annual Conference of the IEEE Industrial Electronics Society",

publisher = "IEEE Press",

note = "41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015 ; Conference date: 09-11-2015 Through 12-11-2015",

}

Ma, L, Kerekes, T , Teodorescu, R, Tang, F, Jin, X, Tong, Y & Liang, J 2016, Leakage current analysis of single-phase transformer-less grid-connected PV inverters. in Proceedings of the 41st Annual Conference of the IEEE Industrial Electronics Society: IECON 2015., 7392211, IEEE Press, pp. 887-892, 41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015, Yokohama, Japan, 09/11/2015. https://doi.org/10.1109/IECON.2015.7392211

Leakage current analysis of single-phase transformer-less grid-connected PV inverters. / Ma, Lin; Kerekes, Tamas ; Teodorescu, Remus et al.
Proceedings of the 41st Annual Conference of the IEEE Industrial Electronics Society: IECON 2015. IEEE Press, 2016. p. 887-892 7392211.

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

TY - GEN

T1 - Leakage current analysis of single-phase transformer-less grid-connected PV inverters

AU - Ma, Lin

AU - Kerekes, Tamas

AU - Teodorescu, Remus

AU - Tang, Fen

AU - Jin, Xinmin

AU - Tong, Yibin

AU - Liang, Jingzhe

PY - 2016

Y1 - 2016

N2 - Transformer-less string PV inverter is getting more and more widely utilized due to its higher efficiency, smaller volume and weight. However, without the galvanic isolation, the leakage current limitation and operation safety became the key issues of transformer-less inverters. This paper simplifies the leakage current generation circuit model and presents a leakage current estimation method both in real time and frequency domain. It shows that the leakage current is related to the circuit stray parameters, output filter and common mode voltage. Furthermore, with the proposed analysis method, the leakage current generation of H-bridge with different modulation methods and HERIC inverter are discussed individually. At last, the presented method has been verified via simulation.

AB - Transformer-less string PV inverter is getting more and more widely utilized due to its higher efficiency, smaller volume and weight. However, without the galvanic isolation, the leakage current limitation and operation safety became the key issues of transformer-less inverters. This paper simplifies the leakage current generation circuit model and presents a leakage current estimation method both in real time and frequency domain. It shows that the leakage current is related to the circuit stray parameters, output filter and common mode voltage. Furthermore, with the proposed analysis method, the leakage current generation of H-bridge with different modulation methods and HERIC inverter are discussed individually. At last, the presented method has been verified via simulation.

KW - Common mode leakage current

KW - Common mode voltage

KW - Grid-connected photovoltaic inverter

KW - Transformer-less

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BT - Proceedings of the 41st Annual Conference of the IEEE Industrial Electronics Society

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Y2 - 9 November 2015 through 12 November 2015

ER -

Leakage current analysis of single-phase transformer-less grid-connected PV inverters

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