Intermittent arc grounding faults are common in medium-voltage distribution networks, and the arc cannot be extinguished without assistance. The application of existing arc suppression methods is limited due to the problems of large compensation residual currents, complex control circuits and large short-circuit currents. Therefore, an active voltage-type grounding fault protection method for medium-voltage distribution networks with neutral point voltage flexible regulation is proposed. The line voltage opposite to the fault phase is extracted from the auxiliary side of the Dyn1 distribution ...
