Single-phase ground fault of insulator due to lightning flashover will lead to arc grounding over-voltage by intermittent arc

which damages the insulation and harms the safe operation of power grid.Therefore

a parallel air-blast interruption gap was developed based on the idea of "conducting" type lightning protection and the "air-blast" arc interruption scheme.The gap can conduct lightning current into the earth rapidly

and meanwhile start the high-speed arc interruption device to interrupt continuous current at fault point and restrain inhibit intermittent arc and over-voltage.Experiment of small current arc interruption and MATLAB based simulation with the air-blast interruption gap model indicate that the air-blast interruption gap can inbibit arc grounding over-voltage caused by lightning flashover.