Novel Bidirectional DC Solid-State Circuit Breaker With Operating Duty Capability

DC microgrids have received remarkable interest in both the academia and the industry for over a decade, yet the protection of dc microgrids remains as a major challenge. This challenge is rooted in the nonexistence of natural zero-crossing point in dc microgrids which rapidly increase the fault cur...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2021-10, Vol.68 (10), p.9104-9113
Main Authors: Ayubu, Zacharie, Kim, Jin-Young, Yu, Jin-Yeol, Song, Seung-Min, Kim, In-Dong
Format: Article
Language:English
Subjects:
Bidirectional dc circuit breaker
Capacitors
Circuit breakers
Circuit faults
Circuits
Commutation
dc microgrids
Distributed generation
Fault currents
Microgrids
operating duty
short circuit protection
Solid state
Solid state circuits
solid-state circuit breaker (SSCB)
Thyristors
Topology
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Summary:DC microgrids have received remarkable interest in both the academia and the industry for over a decade, yet the protection of dc microgrids remains as a major challenge. This challenge is rooted in the nonexistence of natural zero-crossing point in dc microgrids which rapidly increase the fault current. In this article, a novel bidirectional dc solid-state circuit breaker (dc SSCB) to reinforce the bidirectional flow of energy which significantly boosts the overall efficiency of the power supply of dc microgrids is presented. The proposed topology can perform the operating duty of reclosing and rebreaking, and the commutation capacitor is charged and recharged naturally without any complex control of the main or auxiliary thyristors, which is considered atypical of existing topologies. A clear and detailed analysis of the operation of the proposed topology is presented. Finally, the experimental results are presented to confirm the effectiveness of the proposed novel bidirectional dc SSCB.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2020.3026308