摘要
一些处于土壤电阻率较高地区的变电站接地网通常采用引外接地措施,实际接地网腐蚀诊断中却常常忽略变电站引外接地的影响。基于特勒根定理和最优化方法,利用ATP和MATLAB进行仿真实验,分析了引外接地对于接地网腐蚀诊断的影响。结果表明:引外接地网的存在会降低与之直接相连支路诊断的腐蚀程度,引外距离越小影响越大;较大的引外距离与引外接地网中导体故障对接地网腐蚀诊断影响很小。
Buried conductors measures are usually used in substation grounding grid in some area with high soil resistivity,but its impact is usually ignored in practical corrosion diagnosis of grounding grid. Based on Tellegen theory and Optimal method, ATP and MA＇rI.AB software are used to analvze the impaet of buried conductors on the corrosion diagnosis of grounding grid. The results show that buried conductors can reduce the degree of corrosion branch which is directly connected with it,the shorter the distance between grounding grid and buried conductors, the greater the influence. The long distanee between grounding grid and hurled conductors and the fault of buried conductors have less influence on the corrosion diagnosis of grounding grid.
出处
《陕西电力》
2016年第8期60-63,共4页
Shanxi Electric Power
关键词
引外接地
变电站
接地网
腐蚀诊断
buried conductors
substation
grounding grid
corrosion diagnosis
