Design a DC Soild-State Circuit Breaker for smart grid application

摘要

This paper proposed a hybrid solid-state based DC circuit breaker. It includes a mechanical circuit relay, two bilateral power switching devices, a buffer circuit, a surge absorber, a current limit resistor and a microcontroller. In this study, the solid state circuit breaker (SSCB) combined with current limiting circuit has been analyzed and the advantages and disadvantages are addressed. Finally, a prototype of 380VDC, 30A DC solid-state circuit breaker is set and tested under different fault current conditions to verify the feasibility of the architecture proposed in this paper.