Analysis of Electric Field Control Characteristics of Dielectric Gradient Insulated Partition Applied to High Voltage Switchgear

In response to the problem of uneven distribution of electric field and severe local electric field distortion in insulation partitions in high-voltage switchgear, functional material technology is introduced into the preparation of insulation partitions. Two optimization methods, internal insulation structure optimization and surface insulation structure optimization, are proposed. Based on the optimization method, a geometric model of the insulation partition is established. By changing the upper limit of the material’s dielectric constant Electric field and temperature field simulation calculations were conducted on parameters such as insulation partition thickness and surface coating thickness, and their effects on the optimization of electric field distribution were analyzed and compared. The research results indicate that compared to traditional homogeneous insulation partitions, changing the internal insulation structure and adding surface coatings can reduce the maximum field strength along the surface. When the thickness of the insulation partition increases to 12 mm, the effect is optimal, and the maximum field strength along the surface can be reduced by 69.8%; When the surface coating thickness is 1.5 mm, the effect is optimal, and the maximum field strength along the surface can be reduced by 68.5%. Finally, a comparison was made between the two optimization methods, and the differences in the effectiveness of regulating the electric field between the two were analyzed.