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

Research output: Research - peer-reviewArticle

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.
Original languageEnglish
JournalIET Power Electronics
Early online date5 Jan 2017
StateE-pub ahead of print - 5 Jan 2017

    Research areas

  • hybrid DC breaker, current commutation, current-zero, fault interruption, dynamic cfontrol, fault current, waveform profile, cascaded commutation principle

Bibliographical note

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

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