摘要
在电力工程中,存在一类特殊空气间隙,其内部含有电位未知悬浮导体,间隙整体放电特征与单空气间隙有明显不同。笔者旨在研究含悬浮棒组合空气间隙放电特征,设计棒-悬浮棒-棒间隙操作冲击放电试验平台,改变悬浮棒长度与空间位置,观测不同工况下组合间隙放电电压与放电过程。试验发现,随棒长增加,组合间隙击穿电压呈现单调递减趋势,悬浮棒存在“临界长度”,当棒长小于“临界长度”时,组合间隙击穿电压大于无悬浮棒时的单一间隙击穿电压;含悬浮棒组合间隙放电过程与单空气间隙不同,在放电过程中存在悬浮棒迎面流注起始与单间隙多次预击穿的特殊现象。本文研究结果能够为含组合间隙的外绝缘设计提供参考,具有实际工程意义。
In power engineering,there is a kind of special air gap,which contains potential suspension conductor.Its discharging characteristics are different from that of single air gap.The author studies the discharging characteristics of the combination air gap with suspension rod.The experimental platform for switching impulse discharging of rod-suspension rod-rod combination gap is designed.The length and spatial position of the suspension rod are changed,and the discharging voltage and discharging process of the combination gap are observed.It is found that the breakdown voltage of the combination gap decrea-ses monotonically with the increase of the rod length.There is a critical length of the suspension rod,and when the rod length is less than the critical length,the breakdown voltage of the combination gap is grea-ter than that of the single gap without the suspension rod.The discharging process of the combination gap with suspension rod is different from that of the ordinary single air gap,and the special phenomenon are the upward streamer initiation of the suspended rod in the discharge process and the multiple pre-breakdowns with one-side gap.The research results of this paper can provide reference for live-working and the design of external insulation with combination gap,which has practical engineering significance.
作者
孙泽中
鲁海亮
文习山
岳一石
李欣
王成
廖振宇
周光远
张柳
SUN Zezhong;LU Hailiang;WEN Xishan;YUE Yishi;LI Xin;WANG Cheng;LIAO Zhenyu;ZHOU Guangyuan;ZHANG Liu(State Grid Hunan Electric Power Company Limited Research Institute,Changsha 410007,China;Hunan Xiangdian Test&Research Institute Co.,Ltd.,Changsha 410007,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;Jingmen Power Supply Company of State Grid Hubei Electric Power Co.,Ltd.,Jingmen 44800,China)
出处
《电瓷避雷器》
CAS
北大核心
2023年第2期34-40,48,共8页
Insulators and Surge Arresters
基金
国家自然科学基金青年科学基金项目(编号:51507119)。
关键词
操作冲击电压
棒-悬浮棒-棒组合间隙
放电电压
放电过程
switching impulse discharging voltage
rod-suspension rod-rod combination gap
break-down voltage
discharging process
