Numerical Computation of 3D Electromagnetic Heat Current Temperature Field for UHV GIS Basin Insulator

In this paper, aiming at the GIS equipment in operation, the internal heating mechanism is analyzed, and the influence of heat radiation, heat conduction and convective heat transfer is considered by using the developed 3D electromagnetic heat flow coupling field simulation analysis method. The 3D temperature field and fluid field distribution in the GIS equipment are calculated and analyzed. It is found that the temperature distribution of the basin insulator of UHV GIS equipment presents obvious temperature gradient. The temperature of the insulator is higher near the interface between the epoxy and the metal of the center conductor. Under the rated current operation condition, the maximum temperature rise of the center conductor is about 43.67 °C, and the maximum temperature rise of the interface between the basin insulator and the center conductor is about 41.34 °C. The research in this paper can help the operation and maintenance personnel to obtain the internal temperature distribution law of UHV GIS equipment, and provide calculation and analysis basis for the inspection of GIS equipment.