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Fast Y-Type Thyristor-Based DC SSCB Using Complementary Commutation in A Capacitor-Capacitor Pair Structure
Journal article   Open access

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 and Fei Lu
IEEE transactions on power electronics
2022
url
https://doi.org/10.1109/tpel.2022.3202125View
Accepted (AM)Open Access (Publisher-Specific) Open

Abstract

Capacitors Complementary commutation DC circuit breakers Fault currents Inductors Insulated gate bipolar transistors solid-state circuit breakers Thyristors Topology Voltage Y-SSCB Y-type SSCBs
This paper proposes a new thyristor-based dc solid-state circuit breaker (SSCB) named Y-type. Main contributions focus on a new complementary commutation (CC) 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 re-closing and re-breaking 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 V and 400 V, respectively. Also, the peak voltage on the auxiliary capacitors pair reaches 740 V and 400 V. The Y-SSCB achieves a fast reaction time of 80 µs in interrupting 120 A short circuit fault current.

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#7 Affordable and Clean Energy

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Collaboration types
Domestic collaboration
Web of Science research areas
Engineering, Electrical & Electronic
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