Research on Temperature Distribution Calculation of UHV Shunt Capacitor Unit

High-voltage shunt capacitors play a very important role in power systems. With the continuous improvement of manufacturing technology, the electrical breakdown performance of foil-film capacitors has been greatly improved, while thermal aging is still one of the key factors that influences the life of foil-film capacitors. In this paper, the temperature distribution of the BAM7.88-668-1W capacitor unit for Ultra High Voltage engineering is calculated by numerical simulation method. The heating power of the capacitor is calculated and the boundary conditions are set under the ambient temperature of 55°C. The results show that the hottest spots of the capacitor core and shell both appear around the discharge resistors.