A Bi-Directional DC Solid-State Circuit Breaker Based on Flipped Γ-Source

Jing Gao, Ziming Liu, Jinming Luo, Hongjiang Wang, Yiqi Liu and Junyuan Zheng
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Jing Gao: Department of Electrical Engineering, Shenyang Institute of Engineering, Shenyang 110136, China
Ziming Liu: Department of Electrical Engineering, Shenyang Institute of Engineering, Shenyang 110136, China
Jinming Luo: Department of Electrical Engineering, Shenyang Institute of Engineering, Shenyang 110136, China
Hongjiang Wang: Department of Electrical Engineering, Shenyang Institute of Engineering, Shenyang 110136, China
Yiqi Liu: College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, China
Junyuan Zheng: College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, China

Energies, 2022, vol. 15, issue 3, 1-14

Abstract: As the continuous consumption of non-renewable energy leads to resource shortages, distributed PV generation technology has received widespread attention. The DC microgrid is an effective way to connect distributed PV generation. However, DC microgrids have numerous challenges, such as the absence of zero current crossing point and high fault current rising rate. In the paper, a bi-directional DC solid-state circuit breaker based on flipped Γ-source is proposed to overcome some of the challenges in DC microgrid. The topology uses the mutual inductance current generated by the transformer to force the SCR naturally commutates off. Which can rapidly interrupt and isolate the faulty part, and at the same time, there will be no circulating current impact on the source side. The diode bridges allow the response to faults on either the source or load side with only a single controlled switch. Therefore, the topology is simplified while enabling it to obtain the capability of bidirectional operation protection. Finally, using the simulation software PSCAD/EMTDC and experimental platform verifies the effectiveness of the topology in this paper.

Keywords: PV generation; DC microgrid; solid-state DC circuit breaker; bi-directional operation protection (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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