气体绝缘开关柜支柱绝缘子电场分析及优化设计OA

To solve the surface flashover and partial discharge problem of post insulator in the switchgear,research is carried out based on the post insulator in 12 kV dry-air insulated switchgear.The results of analysis on external insulation characteristics of post insulator show that,the electric field of post insulator surface,cuneate airgap and metal insert surface is extremely concentrated.The optimization design is done by parametric modeling and scanning calculation and the electric field is analyzed based on the opti-mized scheme.The electric field strength of the critical parts can reduce more than 40％.Besides,this scheme can avoid the electric field increase of other parts of the post insulator and the insulation charac-teristics can be improved significantly while keeping the post insulator miniaturization.At last,the opti-mized prototype has passed the insulation test verification.