A Novel Single-Phase Bipolar Output AC/DC Converter With Inherent Short-Circuit Current Suppression for DC Microgrid

Weimin Wu; Qianqian Li; Runhui Jiang; Xu Yang; Jinyue Guo; Frede Blaabjerg; Mohamed Orabi; Eftichios Koutroulis; Henry Shu-Hung Chung

doi:10.1109/TPEL.2026.3681591

A Novel Single-Phase Bipolar Output AC/DC Converter With Inherent Short-Circuit Current Suppression for DC Microgrid

Weimin Wu^*
, Qianqian Li
, Runhui Jiang
, Xu Yang
, Jinyue Guo
, Frede Blaabjerg
, Mohamed Orabi
, Eftichios Koutroulis
, Henry Shu-Hung Chung

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Abstract

In DC microgrids, when a short-circuit fault occurs, the large DC smoothing capacitors on the DC side of conventional AC/DC converters generate large short-circuit currents. To mitigate the effects of excessive short-circuit currents, a novel bipolar output, single-phase, four-switch AC/DC converter is proposed in this article. The proposed converter features inherent short-circuit current suppression, which utilizes the step-free nature of the inductor current to suppress the short-circuit current caused by the large DC smoothing capacitors, while also eliminating common-mode leakage currents through its grid-to-load common-ground structure. The performance of the proposed AC/DC converter and the feasibility of the overall solution is verified by simulation and experimental results.

© 2026 IEEE. All rights reserved, including rights for text and data mining, and training of artificial intelligence and similar technologies. Personal use is permitted, but republication/redistribution requires IEEE permission.

Original language	English
Pages (from-to)	15742-15754
Number of pages	13
Journal	IEEE Transactions on Power Electronics
Volume	41
Issue number	9
Online published	7 Apr 2026
DOIs	https://doi.org/10.1109/TPEL.2026.3681591
Publication status	Online published - 7 Apr 2026

Funding

Post Conference Paper [This manuscript is an extension version of the conference article \"A new AC/DC converter with three-bus output and controllable DC link short-circuit current,\" Journal of Physics: Conference Series, Zhengzhou, China, 2024, pp. 12047, doi: 10.1088/ 1742-6596/ 2823/ 1/ 012047.] This work was supported in part by the National Natural Science Foundation of China under Grant 52177186 and Grant U22A20216, in part by Shanghai Outstanding Academic Leader Program Support under Grant 23XD1401500, and in part by Shanghai Frontiers Science Center of \u201CFull Penetration\u201D Far Reaching Offshore Ocean Energy and Power. (Corresponding author: Weimin Wu.)

UN SDGs

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

SDG 7 Affordable and Clean Energy

Research Keywords

AC/DC converter
bipolar output
DC microgrid
short-circuit fault

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title = "A Novel Single-Phase Bipolar Output AC/DC Converter With Inherent Short-Circuit Current Suppression for DC Microgrid",

abstract = "In DC microgrids, when a short-circuit fault occurs, the large DC smoothing capacitors on the DC side of conventional AC/DC converters generate large short-circuit currents. To mitigate the effects of excessive short-circuit currents, a novel bipolar output, single-phase, four-switch AC/DC converter is proposed in this article. The proposed converter features inherent short-circuit current suppression, which utilizes the step-free nature of the inductor current to suppress the short-circuit current caused by the large DC smoothing capacitors, while also eliminating common-mode leakage currents through its grid-to-load common-ground structure. The performance of the proposed AC/DC converter and the feasibility of the overall solution is verified by simulation and experimental results. {\textcopyright} 2026 IEEE. All rights reserved, including rights for text and data mining, and training of artificial intelligence and similar technologies. Personal use is permitted, but republication/redistribution requires IEEE permission. ",

keywords = "AC/DC converter, bipolar output, DC microgrid, short-circuit fault",

author = "Weimin Wu and Qianqian Li and Runhui Jiang and Xu Yang and Jinyue Guo and Frede Blaabjerg and Mohamed Orabi and Eftichios Koutroulis and Chung, \{Henry Shu-Hung\}",

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T1 - A Novel Single-Phase Bipolar Output AC/DC Converter With Inherent Short-Circuit Current Suppression for DC Microgrid

AU - Wu, Weimin

AU - Li, Qianqian

AU - Jiang, Runhui

AU - Yang, Xu

AU - Guo, Jinyue

AU - Blaabjerg, Frede

AU - Orabi, Mohamed

AU - Koutroulis, Eftichios

AU - Chung, Henry Shu-Hung

PY - 2026/4/7

Y1 - 2026/4/7

N2 - In DC microgrids, when a short-circuit fault occurs, the large DC smoothing capacitors on the DC side of conventional AC/DC converters generate large short-circuit currents. To mitigate the effects of excessive short-circuit currents, a novel bipolar output, single-phase, four-switch AC/DC converter is proposed in this article. The proposed converter features inherent short-circuit current suppression, which utilizes the step-free nature of the inductor current to suppress the short-circuit current caused by the large DC smoothing capacitors, while also eliminating common-mode leakage currents through its grid-to-load common-ground structure. The performance of the proposed AC/DC converter and the feasibility of the overall solution is verified by simulation and experimental results. © 2026 IEEE. All rights reserved, including rights for text and data mining, and training of artificial intelligence and similar technologies. Personal use is permitted, but republication/redistribution requires IEEE permission.

AB - In DC microgrids, when a short-circuit fault occurs, the large DC smoothing capacitors on the DC side of conventional AC/DC converters generate large short-circuit currents. To mitigate the effects of excessive short-circuit currents, a novel bipolar output, single-phase, four-switch AC/DC converter is proposed in this article. The proposed converter features inherent short-circuit current suppression, which utilizes the step-free nature of the inductor current to suppress the short-circuit current caused by the large DC smoothing capacitors, while also eliminating common-mode leakage currents through its grid-to-load common-ground structure. The performance of the proposed AC/DC converter and the feasibility of the overall solution is verified by simulation and experimental results. © 2026 IEEE. All rights reserved, including rights for text and data mining, and training of artificial intelligence and similar technologies. Personal use is permitted, but republication/redistribution requires IEEE permission.

KW - AC/DC converter

KW - bipolar output

KW - DC microgrid

KW - short-circuit fault

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U2 - 10.1109/TPEL.2026.3681591

DO - 10.1109/TPEL.2026.3681591

M3 - RGC 21 - Publication in refereed journal

SN - 0885-8993

VL - 41

SP - 15742

EP - 15754

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

IS - 9

ER -

A Novel Single-Phase Bipolar Output AC/DC Converter With Inherent Short-Circuit Current Suppression for DC Microgrid

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UN SDGs

Research Keywords

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