220kV电缆终端SF_6气体微水含量超标分析及处理

Analysis and treatment of SF_6 micro water content exceedance for power cable terminal

六氟化硫(SF6)气体具有良好的灭弧和绝缘性能,被广泛地应用于电力系统的电气设备中,而微水含量作为SF6气体检测的一项重要指标,对设备的安全、稳定运行具有重大的意义。文章介绍了闸电燃气轮机发电厂针对主变户外220kV电缆终端SF6气体微水含量超标的原因分析、治理方案及改造电缆终端密封所采取的技术措施及消除隐患的经验。

SF6 gas is wildly used in the electric device because of its excellent insulative and are eliminating performance. As an important index, micro water content is a key to the device safety and stability. The causes of micro water content exceedance that are aimed at 220 kV outdoor power cable terminal of main transformer is introduced. The paper also presents the treatment method and working experience to eliminate hidden danger.