To reduce the partial discharge(PD)of the basin-type insulator in gas-insulated switchgear(GIS),reduce the occurrence of insulation faults,and improve the safety and stability of GIS operation,we took the 252 kV basin-type insulator as the simulation analysis object.The basin-type insulators with and without grounding shield ring were conducted simulation calculation by Comsol software,and basin-type insulators with different sizes of grounding shield ring were conducted simulation comparison analysis.The insulating and mechanical properties of the basin-type insulator were further verified through experiments.The results show that adding a ground shield ring in the basin-type insulator can effectively improve the electric field in the wedge air gap region and significantly reduce the partial discharge value of the basin-type insulator.
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