王浩,白张,吴劲松,贾申利,赵莉华,黄小龙.高海拔地区中压充气式开关柜温升特性研究[J].电测与仪表,2025,62(11):88-94. WANG Hao,BAI Zhang,WU Jinsong,JIA Shenli,ZHAO Lihua,HUANG Xiaolong.Research on temperature rise characteristics of medium voltage gas-filled switchgear in high altitude areas[J].Electrical Measurement & Instrumentation,2025,62(11):88-94.
高海拔地区中压充气式开关柜温升特性研究
Research on temperature rise characteristics of medium voltage gas-filled switchgear in high altitude areas
Gas-filled switchgear is widely used in high altitude areas of China due to its wide adaptability and high reliability. Due to the reduction of atmospheric pressure in high altitude areas, the air cooling capacity is reduced, so the gas-filled switchgear in high altitude areas is more prone to the problem of high temperature rise. Taking a 12 kV gas-filled switchgear as the research object, a three-dimensional multi-physics coupling model is established for simulation research to explore the influence of altitude on the temperature rise characteristics of gas-filled switchgear under different load currents. The results show that when the switchgear is running at light load, it can work at any altitude. The switchgear in high-altitude areas should not be fully loaded, and should be operated with reduced capacity according to the situation. The gas flow rate near the circuit breaker and the incoming busbar in the cabinet is low, and it is easy to accumulate heat, so the optimization of heat dissipation should be considered. The research results can provide theoretical basis for improving the heat dissipation design of gas-filled switchgear used in high-altitude areas, thus improving the safe and stable operation level of gas-filled switchgear in high-altitude areas.
