Review of Treatments for Suppressing Surface Charge Accumulation and Enhancing Surface Flashover Voltage

The focus of this paper is to provide a comprehensive review of various insulation performance improvement methods for vacuum-solid and compressed air-solid interfaces. The surface characteristics of insulating materials have a significant impact on the flashover voltage along the surface. These surface characteristics include the surface resistivity, surface charge behavior, roughness, secondary electron emission coefficient, and intrinsic properties of the material. Numerous challenges remain to be explored and resolved concerning the causes and mechanisms of surface flashover, methods to increase flashover voltage, and their underlying physical principles. Therefore, the flashover phenomenon along the insulation surface and methods of increasing the flashover voltage have become challenging research key topics in related fields.