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Capacitor Commutation Method for MVDC Hybrid Circuit Breakers

School of EE & Control Engineering, Kongju National University, 275 Budae Dong, Seobuk Gu, Cheonan Si 31080, Korea
Academic Editor: Hamid Reza Karimi
Received: 16 March 2021 / Revised: 6 April 2021 / Accepted: 8 April 2021 / Published: 13 April 2021
(This article belongs to the Section Electrical Engineering)
The medium voltage DC (MVDC) type system can connect multiple terminals to a common MVDC bus, so it is possible to connect several renewable DC power sources to the common MVDC bus, but a DC circuit breaker is needed to isolate short circuit accidents that may occur in the MVDC bus. For this purpose, the concept of a hybrid DC circuit breaker that takes advantage of a low conduction loss contact type switch and an arcless-breaking semiconductor switch has been proposed. During break the hybrid switch, a dedicated current commutation device is required to temporarily bypass the load current flowing through the main switch into a semiconductor switch branch. Existing current commutation methods include a proactive method and a reverse current injection method by a LC (Inductor-capacitor) resonant circuit. This paper proposes a power circuit of a new MVDC hybrid circuit breaker using a low withstanding voltage capacitor branch for commutation and a sequence controller according to it, and verifies its operation through an experiment. View Full-Text
Keywords: medium voltage DC (MVDC); hybrid circuit breaker; conduction loss; arc; capacitor commutation medium voltage DC (MVDC); hybrid circuit breaker; conduction loss; arc; capacitor commutation
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MDPI and ACS Style

Kim, H. Capacitor Commutation Method for MVDC Hybrid Circuit Breakers. Designs 2021, 5, 28. https://0-doi-org.brum.beds.ac.uk/10.3390/designs5020028

AMA Style

Kim H. Capacitor Commutation Method for MVDC Hybrid Circuit Breakers. Designs. 2021; 5(2):28. https://0-doi-org.brum.beds.ac.uk/10.3390/designs5020028

Chicago/Turabian Style

Kim, Hyosung. 2021. "Capacitor Commutation Method for MVDC Hybrid Circuit Breakers" Designs 5, no. 2: 28. https://0-doi-org.brum.beds.ac.uk/10.3390/designs5020028

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