基于悬浮电位电流测量装置的组合间隙放电观测试验研究  

Research on the Discharge Observation Experiment of Combined Air Gap Based on the Suspended Current Measurement Device

作　　者：吴峥 WU Zheng(State Grid Jiangsu Electric Power Co.,Ltd.,Wuxi Power Supply Branch,Wuxi 214000,China)

机构地区：[1]国网江苏省电力有限公司无锡供电分公司,江苏无锡214000

出　　处：《电工技术》2024年第21期208-210,213,共4页Electric Engineering

摘　　要：超/特高压输电线路带电作业是提高电网供电可靠性的重要技术手段,但作业过程存在一定的安全风险,作业人员在进出高压导线时形成带电作业组合间隙,研究组合间隙的放电理论,对于提高作业安全性具有重要意义。然而目前的组合间隙放电试验研究缺乏对悬浮导体上电流的观测手段,阻碍了放电理论的完善。为此,搭建了包含悬浮电位电流测量装置的组合间隙放电试验平台,开展了冲击电压下的放电观测试验,获取了间隙耐受与击穿情况下的电流波形。试验结果表明,在一定的冲击电压作用下,无论间隙耐受或击穿,悬浮导体上均会出现明显的电流脉冲,分别对应放电发展的不同物理过程;试验获取的电流波形与以往研究得到的组合间隙放电图像相符。研究结果进一步验证了组合间隙的放电理论,为完善组合间隙放电理论和制定带电作业安全防护规范提供了数据支撑。Live-line work of extra and ultra high voltage transmission lines is an important technical means to improve the reliability of power supply in the power grid of China,and there are safety risks in the operation.Linemen form a live-line work combined gap while entering the high voltage wire,and studying the discharge theory of the combined air gap is of great significance for improving the safety of linemen.However,the present research on the discharge observation experiment of combined air gap lacks the means to observe the current on floating conductor,which hinders the improvement of discharge theory.Therefore,this paper built a discharge experimental platform with the suspended current measurement device,carried out observation experiments of discharge under impulse,and obtained the current waveform when gap withstand and breakdown.The experiment results show that under a certain impulse,there will be obvious current pulse on the floating conductor regardless of gap withstand or breakdown,which correspond to different physical processes of discharge development;The current waveform obtained by the experiment is consistent with the combined air gap discharge images obtained in previous studies.The results further validate the discharge theory of the combined air gap,and provide data support for improving the combined air gap discharge theory and formulating safety protection regulations for live-line work.

关 键 词：带电作业 组合间隙 悬浮导体 放电发展过程 

分 类 号：TM85[电气工程—高电压与绝缘技术]