电压波形对GIS自由金属颗粒放电特性的影响

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摘要为了探索较高灵敏度检测GIS设备内部自由金属颗粒的方法,研究了电压波形对自由金属颗粒的影响。在实验室中搭建了自由金属颗粒局部放电试验平台,测量了标准雷电波、标准操作波和工频电压下自由金属颗粒局部放电现象,分析比较了不同电压波形下缺陷的局部放电的特征,获得了冲击电压下不同试验阶段的散点图、柱状图等统计谱图。研究结果表明,在3种电压波形下标准雷电波的局部放电起始电压最低,对自由金属颗粒的检测较灵敏。随着标准雷电电压的升高,在雷电波尾处的放电脉冲个数明显增多,但波头处的脉冲仍仅有一个。随着标准操作电压的升高,在波头和波尾处的放电幅值变大,放电个数增多,且波头处的放电个数增加更明显。不同试验阶段的q-t散点图、q-Δt/Δu散点图及N-Δt/Δu柱状图的形貌特征较有规律,可作为表征GIS自由金属颗粒放电严重程度的特征谱图。

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	季洪鑫
	李成榕
	庞志开
	齐波
	郑书生

关键词 ：气体绝缘组合电器, 标准雷电电压, 标准操作电压, 自由金属颗粒, 局部放电

Abstract：In order to explore the method of high sensitivity detection for mobilized metal particles in gas insulated station (GIS)equipment, the effect of voltage waveform on free metal particle has been studied.The experimental platform of mobilized metal particle’s partial discharge has been set up in the laboratory, and mobilized metal particle partial discharge phenomena has been measured under standard lightning impulse voltage, standard switching impulse voltage, and AC voltage respectively.The characteristics partial discharge under different voltage waveforms have been studied, so that the scatter plot and the histogram in different test stages has been acquired under the impulse voltage.The results of the study show that, under the three kinds of voltage waveforms, i.e.the standard lightning impulse voltage (LI), the standard switching impulse (SI), and the AC voltage, the partial discharge inception voltage of the standard lightning voltage is the lowest one, which provides sensitivity for free metallic particles detection.With the increase of the standard lightning impulse voltage, the discharge pulse number becomes more obvious in the wave tail of the standard lightning impulse, but the discharge pulse number in the wave front of the standard lightning voltage remains one.With the increase of the standard switching voltage, the discharge amplitude in the wave front and the tail have become large and the number of discharge is increased, and the number of discharge at the wave front increased more significantly.The characteristics of the q-t scatter plot, the q-Δt/Δu scatter plot, and the N-Δt/Δu histogram are regular, which can be used as the characterization spectrum to indicate the serious degree of GIS mobilized metal particle discharge.

Key words： Gas insulated switchgear (GIS) standard lightning impulse voltage standard switching impulse voltage mobilized metal particles partial discharge

收稿日期: 2015-05-19 出版日期: 2016-07-15

PACS:

TM85

作者简介: 季洪鑫男,1988年生,博士研究生,研究方向为高压电气设备在线监测与故障诊断。E-mail:jihongx816@163.com(通信作者);李成榕男,1957年生,教授,博士生导师,研究方向为气体放电及脉冲功率计算、电气设备绝缘在线监测与故障诊断和电介质材料介电特性。E-mail:lcr@ncepu.edu.cn

引用本文:

季洪鑫,李成榕,庞志开,齐波,郑书生. 电压波形对GIS自由金属颗粒放电特性的影响[J]. 电工技术学报, 2016, 31(13): 218-226. Ji Hongxin, Li Chengrong ,Pang Zhikai ,Qi Bo ,Zheng Shusheng. Influence of Voltage Waveforms on Partial Discharge Characteristics of GIS Mobilized Metal Particles. Transactions of China Electrotechnical Society, 2016, 31(13): 218-226.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I13/218

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