Selective Coordination of GaN-Based Solid State Circuit Breakers

Abstract

While various types of solid state circuit breakers (SSCBs) were recently developed for DC power applications, the coordination and interaction of multiple SSCBs used in a hierarchical power distribution system are yet to be studied. This paper investigates autonomous selective coordination of three 380VDC/20A GaN-based intelligent solid-state circuit breakers without relying on communication in a two-level three-branch power circuit under both short circuit fault and inrush current conditions for the first time. Both experimental results and analysis are discussed in detail.