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Fault-tolerant Quad Active Bridge Converter for Bipolar DC System Interconnection
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Dazhen XU1, Jianjun MA  Member, CPSS1, Miao ZHU  Senior Member, CPSS2
Journal of Power Supply | 2026, 24(4) : 27 - 40
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Journal of Power Supply | 2026, 24(4): 27-40
• Power Converter Topologies •
Fault-tolerant Quad Active Bridge Converter for Bipolar DC System Interconnection
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Dazhen XU1, Jianjun MA  Member, CPSS1, Miao ZHU  Senior Member, CPSS2
Affiliations
  • 1.College of Smart Energy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 2.Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
Published: 2026-04-30 doi: 10.13234/j.issn.2095-2805.2026.4.27
Outline
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To achieve efficient and reliable interconnection in bipolar DC distribution systems, a novel fault tolerant quad active bridge (FT-QAB) converter featuring low power conversion stages and its operation control strategy are proposed. First, the operation control strategy for the FT-QAB under normal operation conditions and the fault reconfiguration operation strategy under pole-to-ground fault (PTGF) conditions on the high- and low-voltage side are presented. Second, the power transmission characteristics and zero-voltage switching operation conditions of the FT-QAB converter during normal and fault-tolerant operations are analyzed. In addition, the flow chart of parameter design and control block diagram of the converter are also given. Third, by comparing the FT-QAB topology with the existing typical converter topologies in the case of bipolar system interconnection, the advantages of the FT-QAB converter in terms of efficiency and fault-tolerant operation capability are clarified, which are realized by reducing the power conversion stages. Finally, the effectiveness of the proposed FT-QAB converter topology and its effectiveness innormal and fault-tolerant operation modes were validated by experimental results.

Bipolar DC system  /  multi-port converter  /  fault reconfiguration  /  zero voltage switching  /  DC microgrid
徐大桢, 马建军中国电源学会会员, 朱淼中国电源学会高级会员. 面向双极直流系统互联的容错型四有源桥变换器. 电源学报, 2026 , 24 (4) : 27 -40 . DOI: 10.13234/j.issn.2095-2805.2026.4.27
Dazhen XU, Jianjun MA, Miao ZHU. Fault-tolerant Quad Active Bridge Converter for Bipolar DC System Interconnection[J]. Journal of Power Supply, 2026 , 24 (4) : 27 -40 . DOI: 10.13234/j.issn.2095-2805.2026.4.27
Funding
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  • Science and Technology Project of State Grid Corporation of China(52094024002G)
Appendix
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Year 2026 volume 24 Issue 4
37
5
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.4.27
  • Receive Date：2025-07-14
  • Online Date：2026-10-29
  • Published：2026-04-30
Article Data
Affiliations
History
  • Received：2025-07-14
  • Revised：2025-08-11
  • Accepted：2025-09-02
Funding
Science and Technology Project of State Grid Corporation of China(52094024002G)
Affiliations
    1.College of Smart Energy, Shanghai Jiao Tong University, Shanghai 200240, China
    2.Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
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