冲击电压下气体绝缘开关设备悬浮缺陷放电特征

发布时间：2018-05-17 23:23

本文选题：气体绝缘开关设备 + 标准雷电波　；参考：《电工技术学报》2017年06期

【摘要】：为探索冲击电压下气体绝缘开关设备(GIS)悬浮缺陷局部放电检测的有效性及灵敏性,搭建了冲击电压下局部放电试验平台,测量了悬浮缺陷在非振荡冲击波(标准雷电波、标准操作波)、振荡冲击波(振荡操作波)和工频电压下的局部放电信号,提取并分析了悬浮缺陷在不同类型冲击电压波下的局部放电特征谱图,比较了冲击电压波形和工频电压对悬浮缺陷检测的灵敏性。研究结果表明,在非振荡冲击波和振荡冲击波作用下,悬浮缺陷放电稳定、重复性好,冲击电压波对悬浮缺陷的局部放电检测较有效;在不同试验阶段内,振荡冲击电压下的q-?散点图及N-?柱状图以及非振荡冲击电压下的q-Δt/Δu散点图和N-Δt/Δu柱状图的形貌特征差别较大,可作为表征GIS悬浮缺陷放电类型及放电严重程度的特征谱图;在三种冲击电压波形中,振荡操作冲击电压波形对缺陷检测灵敏度最高,是工频电压下悬浮缺陷局部放电起始电压的1.3倍。
[Abstract]:In order to explore the effectiveness and sensitivity of partial discharge detection for GISs suspension defects under impulse voltage, a partial discharge test platform was set up under impulse voltage, and the non-oscillatory shock wave (standard lightning wave) of suspension defect was measured. Standard operating wave, oscillating shock wave and partial discharge signal under power frequency voltage, the characteristic spectrum of partial discharge of suspension defect under different types of impulse voltage wave is extracted and analyzed. The sensitivity of impulse voltage waveform and power frequency voltage to suspension defect detection is compared. The results show that under the action of non-oscillatory shock wave and oscillatory shock wave, the discharge of suspension defect is stable and reproducible, and the impulse voltage wave is more effective in detecting partial discharge of suspension defect. Scattered plot and N-? The histogram, Q- 螖 t / 螖 u scattered plot and N- 螖 t / 螖 u bar diagram have different morphologies, which can be used as characteristic spectra to characterize the discharge type and discharge severity of GIS suspension defect, among the three impulse voltage waveforms, The oscillation operation impulse voltage waveform has the highest sensitivity to defect detection and is 1.3 times as high as the initial voltage of partial discharge of suspension defect under the power frequency voltage.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);华北电力大学高电压与电磁兼容北京市重点实验室;
【分类号】：TM855

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