2025-08-04 オークリッジ国立研究所(ORNL)
Prasad Kandula and Marcio Magri Kimpara set up testing of ORNL-developed medium-voltage circuit breakers that use affordable semiconductors to protect grid systems that use direct current. Credit: Carlos Jones/ORNL, U.S. Dept. of Energy
＜関連情報＞
- https://www.ornl.gov/news/medium-voltage-circuit-breaker-unlocks-electricity-abundance-savings
- https://ieeexplore.ieee.org/document/10860928
SCRベースの中電圧DCソリッドステート回路遮断器 CR-based Medium Voltage DC Solid-State Circuit Breaker
Rajendra P. Kandula; Marcio L. Magri Kimpara
2024 IEEE Energy Conversion Congress and Exposition Date Added to IEEE Xplore: 10 February 2025
DOI:https://doi.org/10.1109/ECCE55643.2024.10860928
Abstract
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.
