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Interlink hybrid DC circuit breaker

Li, Chuanyue ORCID:, Liang, Jun ORCID: and Wang, Sheng 2018. Interlink hybrid DC circuit breaker. IEEE Transactions on Industrial Electronics 65 (11) , pp. 8677-8686. 10.1109/TIE.2018.2803778

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—To protect HVDC grids from DC faults, the concept of a hybrid DC circuit breaker is widely accepted due to its low conduction losses and fast interruption speed. For a well-built DC grid, a massive number of hybrid DC circuit breakers have to be installed. This will lead to high capital costs. An interlink DC circuit breaker based on an idea of sharing main breaker branch between two circuit breakers is proposed to reduce the overall costs of circuit breakers in a DC grid. Comparing with existing hybrid DC circuit breakers, the interlink hybrid DC circuit breaker can achieve the same DC fault interruption capability with fewer components. Novel structures of main breaker branches are designed and their parameters are determined to make the interlink hybrid DC circuit breakers be capable for both unidirectional and bidirectional interruption on demand. For a unidirectional interlink hybrid DC circuit breaker, the size of MOVs is reduced by 50%. For a bidirectional interlink hybrid HVDC circuit breaker, the number of IGBTs and MOVs are reduced by 25%. The interlink hybrid DC breakers are verified and compared to the hybrid DC circuit breaker via a three-terminal HVDC grid in PSCAD/EMTDC.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Additional Information: This is an open access article under the terms of the CC-BY Attribution 4.0 International license.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 0278-0046
Date of First Compliant Deposit: 8 February 2018
Date of Acceptance: 20 January 2018
Last Modified: 24 May 2023 16:45

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