摘要
在电力系统中,常存在一些由悬浮物体和空气间隙构成的组合间隙,其放电行为相较常见空气间隙更为复杂,放电特性规律难以总结。针对此,设计了一种含悬浮金属板的棒-板-棒组合间隙试验装置,开展了棒-板-棒组合间隙在雷电冲击电压下放电特性的试验研究,并分析了电压极性、金属板尺寸和金属板位置对组合间隙的放电特性的影响。研究表明,金属板放置于间隙正中时,能够提升间隙的雷电冲击击穿电压。不过当金属板在棒电极附近时,击穿电压可能会低于棒-棒间隙,且不同电压极性下的情况存在差异。此外,金属屏障会增大间隙的放电时间分散性,并改变放电路径。
In power system,there are some combined gaps composed of floating objects and air gaps,the breakdown characteristics are difficult to sum up and more complex compared to the air gaps.In this paper,an experiment device with the Rod-Plate-Rod gap was designed,the breakdown characteristics of the Rod-Plate-Rod gap under the lightning impulse voltage were studied.The effects of voltage polarity,plate size and position on breakdown characteristics were analyzed.Research results show that metal plate could enhance the lightning impulse breakdown voltagewhen the metal plate is in the middle of the gap.In particular,when the metal plate got closer to the rod,the breakdown voltage became lower than the Rod-Rod gap and this phenomenon was related to the polarity of the voltage.In addition,the plate increased the dispersion of breakdown time and changed the flashover route.The research results have guiding significance to practical application.
作者
杨跃光
苏俊源
孙泽中
张予阳
姒天军
鲁海亮
YANG Yueguang;SU Junyuan;SUN Zezhong;ZHANG Yuyang;SI Tianjun;LU Hailiang(China Southern Power Grid EHV Transmission Company,Guangzhou 510063,China;School of Electrical Engineering,Wuhan University,Wuhan 430072,China)
出处
《电瓷避雷器》
CAS
北大核心
2020年第3期68-73,80,共7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)。
