SCR-based Medium Voltage DC Solid-State Circuit Breaker

Conference · Fri Jan 31 23:00:00 EST 2025

DOI:https://doi.org/10.1109/ECCE55643.2024.10860928· OSTI ID:3002807

Kandula, Prasad ^[1]; Magri Kimpara, Marcio ^[1]

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1. ORNL

This paper describes a medium voltage solid-state circuit breaker (SSCB) based on SCR technology, featuring short fault-interruption time and a minimal turn-off auxiliary circuit. The SSCB design incorporates a specialized SCR and a commutation circuit designed with an objective to reduce the required SCR hold-off/turn-off time, tq, which primarily determines the fault interruption duration. To validate the design, simulation analysis is presented, and a 1.5 kV 300 A SSCB prototype has been built and tested. The results confirm the effectiveness of the proposed design philosophy demonstrating the SSCB's ability to interrupt a 200 A load current in less than 50 μs. The proposed SCR-based SSCB has been developed for DC applications but is equally applicable to AC applications.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Electricity Delivery and Energy Reliability (OE); USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 3002807
• Country of Publication: United States
• Language: English