模拟电气设备过热故障时SF6气体分解产物的体积分数及其特征

对于运行中的电气设备,判断其设备内部运行状态相对困难.通过分析检测SF6气体的分解产物是判断SF6气体绝缘设备内部运行情况的一个强有力手段.笔者模拟了SF6电气设备不同温度和湿度的过热情况下所产生的分解产物类型及其体积分数.为确定电气设备故障类型提供数据支持.通过模拟试验得出.SF6在350℃时即开始产生较显著的分解产...

Analyzing Decomposition Products in Overheat Faults Simulation to Evaluate SF6 Gas Insulation Device

For safety evaluation of an SF6 gas insulation device in operation,it is very effective to detect the decomposition products of SF6.The authors detected the decomposition products and their concentrations in an SF6 gas insulation device under simulated overheat conditions with different temperature and humidity to offer a support to diagnosis of electric equipment.The simulation results showed that SF6 was clearly decomposed at 350 ℃.The higher the humidity was,the higher the concentrations of such decomposition products as SO2,H2S,and HF were.Moisture in this type of electric equipment accelerates the decomposition of SF6,therefore moisture must be strictly controlled in order to ensure the safe operation of the equipment.HF will erode equipment when its concentration is over a certain value,while the effect of S2OF10 on SF6 decomposition is not significant.