Optimization Design of Heater for GIS Circuit Breaker in Alpine Region Based on Thermal and Flow Field Coupling Simulation

Abstract

Gas Insulated System (GIS) circuit breaker in the alpine region has the risk of cryogenic liquefaction of SF6 gas and seriously affects the safe and reliable operation of the electrical equipment. Install the heater can be achieved on the internal gas heating, however, due to the hot gas flow and the complexity of the internal structure of the circuit breaker, it is difficult to accurately predict the overall temperature distribution after heating and ensure the reasonableness of the heater parameter design. In this paper, a temperature distribution model based on the finite volume method of thermal and flow field is established. The temperature distribution law of GIS circuit breaker with different heating power is mastered. Based on this model, the power and structure of GIS circuit breaker heater are optimized reasonably, the power consumption is reduced, gas liquefaction is avoided, and the operation reliability of GIS equipment in alpine region is improved.