High voltage insulation sleeve field analysis and structural optimization

The high voltage insulation sleeve is an important component of the gas insulated metal enclosed switchgear (GIS) for the insulation of high voltage and potential, and its uniform electric field distribution and reasonable structure are the guarantee of the safe operation of GIS. In this paper, the structure design and electric field distribution problem of 52 kV GIS high voltage insulation sleeve are studied. Based on the electromagnetic field theory, the mathematical model of electric field distribution calculation of insulation sleeve is established and the simulation of electric field distribution of sleeve based on ANSYS software is carried out. The influence of the electric field distribution near the grounding inner shielding of the sleeve on the electric intensity of the local area of the outer surface of the sleeve is studied, and the structure of the inner shielding of the sleeve is designed accordingly. The optimization results of the structure of the inner shielding of the sleeve show that the maximum tangential field strength on the outer surface of the sleeve is reduced by about 29%, which makes its insulation significantly improved.