输电线路杆塔接地电阻的简化计算  

Simplified Calculation for Grounding Resistance of Transmission Tower

作　　者：厉天威[1] 何民[1] 卢本初[1] 程思勇[1] 

机构地区：[1]广西电力工业勘察设计研究院,广西壮族自治区南宁市530023

出　　处：《电网技术》2011年第9期170-175,共6页Power System Technology

基　　金：广西电力工业勘察设计研究院"基于广西地质情况的输电杆塔接地的研究与设计(PB08002)"项目的资助

摘　　要：输电线路杆塔接地设计中,通常应用经验公式计算杆塔接地电阻,计算精度有限。为此,考虑到接地导体扩散电流的不均匀性,对接地导体进行分段处理,计算各分段导体的自电阻系数和互电阻系数,进而求得接地导体的接地电阻。可根据精度要求确定分段数量,分段数量越多,计算精度越高。最后分析了输电线路杆塔常用的射线接地体、双环形接地体分别在不同土壤电阻率、导体半径、埋设深度等条件下的接地电阻,可为接地体优化设计和型式选择提供参考。In the grounding design of high voltage transmission line the empirical formula is often used to calculate the grounding resistance of transmission tower, so the calculation accuracy is just passable. Considering the I non-uniformity of the current dispersed from the grounding electrode, a grounding electrode is divided into sections to calculate their self-resistance coefficients and mutual resistance coefficients, thus the grounding resistance of grounding electrode is solved. The number of conductor sections is dependent upon the requirement to computation accuracy, the more the number of the sections, the higher the computational accuracy. Finally, the grounding resistances of grounding electrode usually used for transmission tower, such as radial grounding electrode and double-ring grounding electrode, under different soil resistivity, conductor radii and depths of burying are analyzed.

关 键 词：输电线路 接地电阻 杆塔 

分 类 号：TM753[电气工程—电力系统及自动化]