A Space-Vector-Modulation Scheme to Reduce Leakage Current in Soft-Switching Three-Phase Transformerless Inverters

Yuying Wu; Zheng Chen; Chunxu Zhang; Yousu Yao; Shun Peng Zhu

doi:10.1109/TIE.2026.3651388

A Space-Vector-Modulation Scheme to Reduce Leakage Current in Soft-Switching Three-Phase Transformerless Inverters

Yuying Wu^*
, Zheng Chen
, Chunxu Zhang
, Yousu Yao
, Shun Peng Zhu

^*Corresponding author for this work

School of Electrical Engineering and Automation

University of Electronic Science and Technology of China
SolaX Power

Research output: Contribution to journal › Article › peer-review

Abstract

When the soft-switching three-phase inverter is applied in transformerless photovoltaic (PV) systems, its common-mode (CM) leakage current has to be suppressed to satisfy grid codes. However, conventional zero-voltage-switching space-vector-modulation (ZVS-SVM) adopted for the inverter produces high common-mode voltage during its operation. In this article, a modified ZVS-SVM scheme is proposed to reduce the CM voltage (CMV) generated by the inverter. Circuit working principles under the proposed scheme are illustrated. Besides, CM behavior and performance of the proposed method are compared with the traditional method. Finally, the effectiveness of the proposed method is verified by simulation and experiments.

Original language	English
Pages (from-to)	8716-8727
Number of pages	12
Journal	IEEE Transactions on Industrial Electronics
Volume	73
Issue number	6
DOIs	https://doi.org/10.1109/TIE.2026.3651388
State	Published - 1 Jun 2026

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Common-mode voltage (CMV)
pulsewidth modulation (PWM)
three-phase inverter
zero-voltage-switching (ZVS)

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10.1109/TIE.2026.3651388

Cite this

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title = "A Space-Vector-Modulation Scheme to Reduce Leakage Current in Soft-Switching Three-Phase Transformerless Inverters",

abstract = "When the soft-switching three-phase inverter is applied in transformerless photovoltaic (PV) systems, its common-mode (CM) leakage current has to be suppressed to satisfy grid codes. However, conventional zero-voltage-switching space-vector-modulation (ZVS-SVM) adopted for the inverter produces high common-mode voltage during its operation. In this article, a modified ZVS-SVM scheme is proposed to reduce the CM voltage (CMV) generated by the inverter. Circuit working principles under the proposed scheme are illustrated. Besides, CM behavior and performance of the proposed method are compared with the traditional method. Finally, the effectiveness of the proposed method is verified by simulation and experiments.",

keywords = "Common-mode voltage (CMV), pulsewidth modulation (PWM), three-phase inverter, zero-voltage-switching (ZVS)",

author = "Yuying Wu and Zheng Chen and Chunxu Zhang and Yousu Yao and Zhu, \{Shun Peng\}",

note = "Publisher Copyright: {\textcopyright} 2026 IEEE.",

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doi = "10.1109/TIE.2026.3651388",

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T1 - A Space-Vector-Modulation Scheme to Reduce Leakage Current in Soft-Switching Three-Phase Transformerless Inverters

AU - Wu, Yuying

AU - Chen, Zheng

AU - Zhang, Chunxu

AU - Yao, Yousu

AU - Zhu, Shun Peng

PY - 2026/6/1

Y1 - 2026/6/1

N2 - When the soft-switching three-phase inverter is applied in transformerless photovoltaic (PV) systems, its common-mode (CM) leakage current has to be suppressed to satisfy grid codes. However, conventional zero-voltage-switching space-vector-modulation (ZVS-SVM) adopted for the inverter produces high common-mode voltage during its operation. In this article, a modified ZVS-SVM scheme is proposed to reduce the CM voltage (CMV) generated by the inverter. Circuit working principles under the proposed scheme are illustrated. Besides, CM behavior and performance of the proposed method are compared with the traditional method. Finally, the effectiveness of the proposed method is verified by simulation and experiments.

AB - When the soft-switching three-phase inverter is applied in transformerless photovoltaic (PV) systems, its common-mode (CM) leakage current has to be suppressed to satisfy grid codes. However, conventional zero-voltage-switching space-vector-modulation (ZVS-SVM) adopted for the inverter produces high common-mode voltage during its operation. In this article, a modified ZVS-SVM scheme is proposed to reduce the CM voltage (CMV) generated by the inverter. Circuit working principles under the proposed scheme are illustrated. Besides, CM behavior and performance of the proposed method are compared with the traditional method. Finally, the effectiveness of the proposed method is verified by simulation and experiments.

KW - Common-mode voltage (CMV)

KW - pulsewidth modulation (PWM)

KW - three-phase inverter

KW - zero-voltage-switching (ZVS)

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U2 - 10.1109/TIE.2026.3651388

DO - 10.1109/TIE.2026.3651388

M3 - 文章

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JO - IEEE Transactions on Industrial Electronics

JF - IEEE Transactions on Industrial Electronics

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ER -

A Space-Vector-Modulation Scheme to Reduce Leakage Current in Soft-Switching Three-Phase Transformerless Inverters

Abstract

UN SDGs

Keywords

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