高压开关柜绝缘故障分析与处理

Insulation Fault Analysis and Treatment of High Voltage Switchgear

随着电力系统的高速发展,成套开关电器逐步向着高电压、小型化方向发展。高压开关柜的使用,很大程度上加速了变电站的设计与建设,减少了占地面积,提高了变电站的运行质量,但开关柜的安全运行对电网的安全生产和可靠运行起着非常重要的作用。近年来,从运行经验来看,由于环境影响,高压室内温度骤变、温差较大造成高压柜柜内凝露现象发生,凝露将直接影响到母线、套管、支柱绝缘子、电缆和互感器等柜内设备的绝缘问题,是诱发高压开关柜事故的一个重要原因。据统计绝缘故障占到高压开关柜总故障的30%,因此分析和处理高压开关柜绝缘故障对电网安全稳定运行有着举足轻重的意义。

With the rapid development of the power system, complete step by step toward the high voltage electrical switches, miniaturization direction. The use of high voltage switchgear, largely accelerate the design and construction of substations, reducing the footprint, improve the operation quality substation, but the safe operation of switchgear production safety and reliable operation of the grid plays a very important effect. In recent years, operating experience, due to the environmental impact, high-voltage indoor temperature fluctuations, resulting in larger temperature difference between the high-pressure cabinet cabinet condensation occurs, condensation will directly affect the bus, bushings, insulators, cables and transformers issues such as insulation inside the device, is an important reason for the accident-induced high voltage switchgear. According to statistics insulated high voltage switchgear failure accounted for 30% of total failure, so the analysis and processing of high voltage switchgear insulation fault on the power grid security and stability has a significant meaning.