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高压电器  2015 

现场检测SF6分解产物中CO体积分数异常的原因分析

DOI: 10.13296/j.1001-1609.hva.2015.07.036, PP. 191-194

Keywords: SF6分解产物,CO体积分数异常,现场检测,原因分析

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Abstract:

目前,在电力系统中加强SF6分解产物的监测,对于及时发现设备异常具有重大意义。文中简述了目前几种检测SF6分解气体的方法,关于某500kV变电站5042、5043开关SF6气室现场检测发现CO体积分数异常的的现象,及时进行了多次现场跟踪检测,并且对SF6气体采样进行了实验室分析验证,结果显示实验室分析结果与现场检测结果存在差别很大。根据实验结果及仪器原理的分析发现某型号的现场检测仪存在气体相互干扰的结构缺陷,未能很好地把H2与CO分离开来,导致把H2的量计算到CO的体积分数里面。不准确的数据给正确判断设备故障带来极大的干扰,针对此问题文中对于现场检测提出了建议。

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