Fast Y-Type Thyristor-Based DC SSCB Using Complementary Commutation in a Capacitor-Capacitor Pair Structure

Reza Kheirollahi, Shuyan Zhao, Xin Zan, Hua Zhang, Xiaonan Lu, Jun Wang, Al Thaddeus Avestruz, Fei Lu

Research output: Contribution to journalArticlepeer-review

Abstract

This article proposes a new thyristor-based dc solid-state circuit breaker (SSCB) named Y-type. Main contributions focus on a new complementary commutation circuit including a capacitor-capacitor pair, which features three remarkable advantages. First, a fast commutation is achieved using a countercurrent pulse injection by the capacitor-capacitor pair structure. Second, metal-oxide varistors (MOVs) are disconnected from the power line when SSCB is off, which solves the reliability issue due to the MOV degradation and enhances the voltage utilization rate of the main switch. Third, benefiting from the capacitor-capacitor pair structure, reliable reclosing and rebreaking are obtained for practical applications. Experiments are conducted on a 400 V/120 A prototype to validate the proposed Y-SSCB. The peak voltage on the main and auxiliary thyristors reaches 773 and 400 V, respectively. Also, the peak voltage on the auxiliary capacitors pair reaches 740 and 400 V. The Y-SSCB achieves a fast reaction time of 80 μs in interrupting 120 A short-circuit fault current.

Original languageEnglish (US)
Pages (from-to)1144-1154
Number of pages11
JournalIEEE Transactions on Power Electronics
Volume38
Issue number1
DOIs
StatePublished - Jan 1 2023

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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