Comprehensive Evaluation Method for Latent Defects of Basin Insulator in GIS

The insulation performance of basin insulator is largely depends on whether there are defects on the surface and interior of the basin and the surface of metal electrode. These defects will cause sudden changes in the electric field near it, resulting in GIS equipment failure. A comprehensive evaluation method for latent defects of basin insulator in GIS has been presented in this paper. The latent defects of GIS are screened by partial discharge detection, and the size and location of defects are further determined by X-ray detection. Based on the influence of various latent defects on GIS insulation deterioration, a comprehensive evaluation function is constructed, the harm degree of various defects is quantified, and the comprehensive evaluation and early warning identification of GIS latent defects are realized. It is verified by an example that it has good engineering application value.