Active Arc-Suppression Scheme Based on Sliding Mode Control for Single-Phase Grounding Fault in Distribution Network

It is difficult to extinguish the fault current when a single-phase ground fault occurs in neutral non-effectively distribution network. An active arc-suppression method using sliding mode control is proposed in this paper. The H-bridge inverter control system of the cascade bridge is applied to the discussed arc-suppression method, which does not need to be linearized, but only needs to derive the appropriate control law through the mathematical model of the system. It has the advantages of fast response, high control accuracy, strong anti-interference, and can effectively realize the non-static difference tracking of the command current with favorable performance. The simulation results show that the method proposed can effectively suppress the fault current and is helpful to improve the power supply reliability.