Fully Soft-Switched DC Solid-State Circuit Breakers
2023; Institute of Electrical and Electronics Engineers; Volume: 38; Issue: 6 Linguagem: Inglês
10.1109/tpel.2023.3237785
ISSN1941-0107
AutoresReza Kheirollahi, Shuyan Zhao, Hua Zhang, Fei Lu,
Tópico(s)Electrical Fault Detection and Protection
ResumoThis letter presents a new fully soft-switched dc solid-state circuit breaker. During dc current interruption, both main and auxiliary switches turn off under zero current switching (ZCS). A novel inductor–capacitor–capacitor-based active injection circuit is proposed. It eliminates transient power on switches with a fast operation, which enhances reliability. Experiments of a 350 V/90 A prototype validate the ZCS operation for both switches. The response speed reaches 4 μs, and the maximum voltage on switches is 759 V, which is within a safe range. This letter is accompanied by slides as multimedia material demonstrating major innovations and contributions.
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