Electric Field Distribution Detection and Surface Insulation Enhancement for GIS/GIL by Flexible Smart Surface Coating Insulators

Surface defects in epoxy resin insulators are a critical factor leading to the decline in the insulation performance of GIS/GIL equipment. In this article, an innovative coating design utilizing the electroluminescence effect is proposed for the precise identification of surface defects on insulators. The coating demonstrates a linear relationship between electric field strength and luminescence intensity under AC conditions. Through detailed experimental analysis, it was observed that with an increase in AC voltage, the luminescent area on the surface of basin insulators progressively expands, with the luminescence intensity decreasing from the high-voltage conductor towards the grounded shell. In metal particle conditions, variations in luminescence intensity provided a basis for effectively identifying the location of metal particles. Additionally, the coating exhibited a higher dielectric constant, effectively mitigating the adverse effects of metal particles on the insulation performance of basin insulators. The research provides a new method for the detection and evaluation of the surface insulation insulation of epoxy resin insulators.