Thickness Optimization for Capacitance Core of High Voltage Transformer Bushing Based on Finite Element Method

The stability of the power system is becoming more and more essential with the rapid development of the national economy, as one of the most important components of power transformers, bushing plays a significant role in electrical insulation. This paper takes the 500 kV GOE oil-immersed bushing as the object of study, constructing a bushing simulation model, and using FEM (Finite Element Method) to research the electric field strength of the bushing. The electric field strength distribution of bushing under the different capacitor core thickness, the radius of the shield electrode, and the ascending flanged base diameter is discussed. Then the influence of the capacitor core thickness and the radius of the shield electrode on the maximum electric field strength is considered to optimize the structure of the shield electrode. The analysis results provide a theoretical basis for the practical application of engineering.