杆塔接地电阻的改善及仿真分析

作者：施展鹏1，宋 刚2 日期：2007-12-28/span> 浏览：4143 查看PDF文档

杆塔接地电阻的改善及仿真分析
施展鹏1，宋 刚2
（1.嘉兴电力局 南湖供电分局，浙江 嘉兴 314000; 2.浙江大学 电气工程学院，浙江 杭州 310027）

摘 要：针对传统的通过延长接地电极来降低冲击接地电阻的方法，根据计算机仿真，讨论了埋设深度、电极形状、水平电极长度、接地电极布置方式等对杆塔接地电阻的影响，并根据模型仿真结果得出：在电极总长度相同情况下方形电极的冲击接地电阻要小于圆形电极，水平电极的长度通常情况下不应超过20 m，复合接地电极在土壤分层情况下的接地效果要远好于水平接地电极。仿真结果为实际工程提供了一定参考。
关键词：杆塔接地电极；冲击电阻；接地电极模型；计算机仿真

Improved measures of tower footing resistance reduction and simulation analysis
SHI Zhanpeng1, SONG Gang2
(1.Nanhu Power Supply Branch Office, Jiaxing Electric Power Bureau, Jiaxing 314000, China;
2.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract: Based on the traditional measures in reducing tower footing resistance, the influence of the depth、 shape、 length of radial electrode and arrangement of electrode on tower footing resistance were discussed via computer simulation. It was concluded that the effect of dispersing lightning current of square electrode is better than the circle one in the same condition. The length of electrode was supposed less than 20 meters. For two layers soil, the effect of combined groundings is much better than horizontal groundings. Some references for engineering design were presented.
Key words: tower footing resistance; surge impedance; grounding electrode model; computer simulation

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