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Cascaded commutation circuit for a hybrid DC breaker with dynamic control on fault current and DC breaker voltage

Shan, Yunhai and Lim, Tee C. and Finney, Stephen J. and Guang, Weixiao and Williams, Barry W. and Holliday, Derrick and Ding, Xiao (2017) Cascaded commutation circuit for a hybrid DC breaker with dynamic control on fault current and DC breaker voltage. IET Power Electronics. ISSN 1755-4535

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Abstract

This paper proposed a cascaded commutation circuit based on current commutation approach for low-to-medium voltage DC fault current interruption, without snubber circuits, which slows the fault current di/dt prior to current-zero and the rate of rise of the transient recovery voltage dv/dt across the mechanical breaker contacts after current zero. The proposed dynamic control of the fault current di/dt and circuit breaker voltage dVVCB/dt increase the fault current interruption capabilityat the first and second current-zeros. Detailed mathematical equations are presented to evaluate the operational waveform profile and the validity of the cascaded commutation principle is confirmed by simulation and experimental results at 600Vdc, 110A and 330A.

Item type: Article
ID code: 59286
Notes: This paper is a postprint of a paper submitted to and accepted for publication in IET Power Electronics and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library
Keywords: hybrid DC breaker, current commutation, current-zero, fault interruption, dynamic cfontrol, fault current, waveform profile, cascaded commutation principle, Electrical engineering. Electronics Nuclear engineering, Electrical and Electronic Engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Depositing user: Pure Administrator
Date deposited: 06 Jan 2017 10:42
Last modified: 21 Sep 2017 13:57
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URI: https://strathprints.strath.ac.uk/id/eprint/59286
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