8th International Conference on Advanced Power System Automation and Protection (APAP2019)

In order to solve the problems of active intervention arc extinction device, such as PT inrush current, overvoltage after arc extinction and low start-up sensitivity for high impedance grounding faults, a new method which is the active intervention arc extinction device parallels with arc suppression coil is proposed in this paper. Its role for suppressing PT inrush current, post-overvoltage and significantly improving the start-up sensitivity is demonstrated. Effectiveness of the method is verified by experimental tests.

distribution network,single-phase grounding,active intervention arc suppression,arc-suppression coil,start-up sensitivity