Novel series LC resonance DC fault current limiter

DC fault current limiters (FCLs) are of great significance to the safe and stable operation of DC distribution systems. Among the various FCLs, inductor-based FCLs play an important role. However, the issue of inductor saturation generally exists, which causes limitations in practical engineering applications. A novel LC-resonance-based FCL is proposed in this paper, which can suppress the inductor-saturation effect and create a natural zero-cross current for enhancing performance. In addition, it can cooperate with the AC circuit breaker (ACCB) to quickly cut off faults. A theoretical analysis and the parameter design of the proposed FCL are presented. Finally, a scaled-down experiment test platform is built, and experiment tests and simulation case studies are carried out to verify the working principle and superiorities of the proposed FCL.