电瓷避雷器Issue(1)：61-69,9.DOI:10.16188/j.isa.1003-8337.2025.01.008
输电线路杆塔埋地接地体腐蚀断点散流特性研究
Buried Grounding Electrode Corrosion Breakpoint Dispersion Characteristics of Transmission Line Tower
摘要
Abstract
The metal grounding grid of transmission line tower faces the problem of corrosion for a long time,which affects the service life of grounding grid and lightning protection safety of line.The corrosion of the metal grounding electrode will cause breakpoints in the tower grounding grid,and the grounding re-sistance of the entire grounding grid will exceed the limit.In order to solve the problem of grounding flow in the corrosion fracture of tower grounding grid,a simulation model using virtual conductor instead of breakpoint was established to analyze the effects of soil resistivity,frequency of grounding current and breakpoint position on the scattering characteristics of box grounding grid,box extension without break-point and box extension with breakpoint.The results show that with the increase of soil resistivity,the in-crease rate of grounding resistance with breakpoint in square enclosure extension first increases and then tends to saturation.The change of the frequency of incoming current has little effect on the grounding re-sistance with breakpoint in the epitaxial of square frame.The current on the epitaxial lead decreases with the increase of frequency and the maximum current on the isolated epitaxial lead gradually moves for-ward.The closer the breakpoint is to the grounding grid,the greater the grounding resistance and the more obvious the gradient of the grounding scalar potential at the breakpoint.关键词
输电线路/腐蚀/断点/接地电阻/标量电势Key words
transmission lines/corrosion/breakpoint/grounding resistance/scalar potential引用本文复制引用
黄涛,陈宁,谢洪平,沈文韬,胡元潮,林冬阳..输电线路杆塔埋地接地体腐蚀断点散流特性研究[J].电瓷避雷器,2025,(1):61-69,9.基金项目
江苏省电力有限公司科技项目基金资助(编号:J2020072).Project supported by Science and Technology Project Fund of Jiangsu Electric Power Co.,Ltd.(No.J2020072). （编号:J2020072）
