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A clamping type DC circuit breaker with short fault isolation time and low energy dissipation

Zhao, Xibei, Li, Gen, Xu, Jianzhong and Yuan, Jinsha 2021. A clamping type DC circuit breaker with short fault isolation time and low energy dissipation. CSEE Journal of Power and Energy Systems 10.17775/CSEEJPES.2020.05180

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Abstract

The development of DC grids faces challenges from DC fault protection. The conventional DC circuit breaker (DCCB) employs metal-oxide varistor (MOV) to isolate the faulted line, in which the fault isolation process is coupled with the energy dissipation process. In this study, a clamping type DCCB (CTCB) uses internal capacitors to clamp the converter voltage is proposed. Thanks to the proposed configuration, fault isolation and energy dissipation are decoupled, resulting in a fast fault isolation and low energy dissipation compared to the conventional DCCB. The working principle of the proposed CTCB is presented and verified in a DC grid simulation model. A comparison is made with the traditional DCCB. The fault isolation time can be reduced by 34.5 %. The dissipated energy can be reduced by 17.4 %. The energy dissipation power can be reduced by 76.2 %.

Item Type: Article
Date Type: Published Online
Status: In Press
Schools: Engineering
Publisher: IEEE
ISSN: 2096-0042
Date of First Compliant Deposit: 22 March 2021
Date of Acceptance: 3 February 2021
Last Modified: 30 Jun 2022 09:37
URI: https://orca.cardiff.ac.uk/id/eprint/139995

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