In view of such difficult as fault arc suppression of medium/low voltage resonant grounding distribution network

a kind of a new master-slave active arc-suppression scheme combining arc suppression coil and single-phase cascade H-bridge converter is proposed in this paper.H-bridge inverter and PI control system are designed by real time collecting and tracking the fault residual current.The full compensation of the ground fault current is achieved by way of injecting the neutral point with controllable current with equal amplitude and opposite phase of fault residual currentso as to achieve effective arc extinguish of the fault.It is shown by the simulation results that the proposed scheme can meet the requirements of full compensation of ground fault current

can quickly and effectively compensate the active

reactive and harmonic components of ground fault current of the distribution network achieve reliable arc extinguishing and improve the power supply reliabilityof distribution network.