| Title |
Fabrication and Performance Evaluation of MOV for Voltage Clamping in SSCBs Using Simplified Test Equipment |
| Authors |
Moon-Sik Chu ; Sung-Geun Song ; Yong-Gu Kim |
| DOI |
https://doi.org/10.6113/TKPE.2025.30.3.201 |
| Keywords |
Solid-State Circuit Breaker (SSCB); Ultrafast Interruption; Voltage Clamping MOV; DC Distribution Network; Electric Propulsion System |
| Abstract |
The use of DC distribution networks increases with the increasing adoption of electric propulsion systems in ships. Conventional mechanical circuit breakers should be replaced with solid-state circuit breakers (SSCBs) capable of ultrafast interruption in the microsecond range to ensure protection for these networks. This study focuses on the development of a 1.1 kV 2 kA SSCB for protecting 10 MW-class electric propulsion ships. A voltage-clamping MOV, a semiconductor switching unit, which is the core component of the SSCB, and a simplified short-circuit test setup were designed and fabricated. The voltage-clamping performance of the MOV and the operational characteristics of the SSCB were analyzed. Results confirmed that the developed SSCB can perform high-speed DC power interruption under its rated capacity. The proposed SSCB could be applied to large-scale electric propulsion systems for ships and power trading systems based on high-capacity ESS DC distribution networks. |