悬浮缺陷模型局部放电发展过程中分解产物的特征

发布时间：2018-01-07 13:44

本文关键词：悬浮缺陷模型局部放电发展过程中分解产物的特征　出处：《高压电器》2016年12期 　论文类型：期刊论文

【摘要】：悬浮放电是GIS的典型缺陷之一。通过对GIS设备局部放电的检测和分析,可实现设备状态评估和故障诊断。文中利用脉冲电流法和分解物检测法,研究了间断恒压法下GIS悬浮缺陷模型局部放电发展过程及其分解产物的特征,并在局部放电已产生分解物的前提下,探究了各分解气体的扩散特征。实验结果表明:局部放电放电特征量不因外施电压间断而发生改变;局部放电发展中SF_6气体水分体积分数呈增长趋势,仅用SF_6气体微水含量偏高来推测GIS设备受潮存在一定局限;若分解物检测试验中只检测到SO_2气体,则GIS设备可能存在放电程度较严重的悬浮放电缺陷,因此SO_2气体可用于判断悬浮放电发生与否;CO气体扩散速度较快,可作为判断设备故障严重程度的特征气体。
[Abstract]:Suspension discharge is one of the typical defects of GIS. Through the detection and analysis of partial discharge of GIS equipment, the equipment state evaluation and fault diagnosis can be realized. In this paper, pulse current method and dissociation detection method are used. The development process of partial discharge and the characteristics of decomposition products of GIS suspension defect model under discontinuous constant voltage method were studied, and the decomposition products were obtained on the premise of partial discharge. The diffusion characteristics of the decomposed gases are investigated. The experimental results show that the characteristic values of partial discharge do not change due to the intermittent applied voltage. In the development of partial discharge (PD), the moisture content of SF_6 gas tends to increase, but it is limited to speculate that the moisture content of GIS equipment is higher than that of SF_6 gas. If only SO_2 gas is detected in the dissociation test, there may be serious suspension discharge defects in the GIS equipment, so the SO_2 gas can be used to judge whether the suspended discharge occurs or not. The CO gas diffusion speed is fast and can be used as the characteristic gas to judge the fault severity of the equipment.
【作者单位】：内蒙古电力科学研究院;
【基金】：内蒙古电力(集团)有限责任公司科技项目(201401039)~~
【分类号】：TM595
【正文快照】： 0引言局部放电是电气设备绝缘性能及其运行状态评估的有效手段[1]。通过对局部放电发生和发展过程中伴随着的“声、光、电和热”现象的检测和分析,便可准确的判断设备运行状态和缺陷严重程度[2-6]。GIS设备有固定或自由金属颗粒、接触不良、金属突出物和气泡等典型缺陷形式。

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