一种任意三角形补偿的接地电阻测试新方法  

A New Measurement for Grounding Grid Resistance Based on Triangle Compensation Testing Method

作　　者：李志忠[1,2] 王森[1,2] 牛博[1,2] 王雪松[1,2] 吉宏亮[1,2] 

机构地区：[1]陕西电力科学研究院 [2]国家电网公司电网接地工程技术实验室,西安710054

出　　处：《电测与仪表》2010年第9期8-12,26,共6页Electrical Measurement & Instrumentation

基　　金：国家电网公司科技项目(SGKJJSKF[2008]634)

摘　　要：随着社会城市化的发展,变电站所处环境变得极其复杂,给接地电阻测试试验中电极位置的准确放置工作带来极大不便。为此,研究出一种接地网与电极呈任意三角形的接地电阻测试新方法。所提方法基于三极法测量接地电阻的原理,通过接地网、电流极和电压极呈任意三角形的两次以上接地电阻测试,用视在接地电阻、三角形边长建立关于等值土壤电阻率和接地电阻的超定方程组,用遍历土壤电阻率求取满足方程组的最优等值土壤电阻率,并用此对视在接地电阻进行补偿,从而得到变电站接地网的接地电阻。最后用实例测试证明所提方法正确、可行。The environment of substation have become complex with the development of urbanization,which makes the accurate placement of electrode difficult in the grounding resistance testing.So a new testing method is proposed,in this measurement,the position of electrodes must not be restricted.It is based on the principle of measuring grounding resistance by three-pole method,which get grounding resistance through more than twice grounding resistance test,and grounding grid,current electrode and potential electrode...

关 键 词：接地电阻 电极位置 三极法 等值土壤电阻率 

分 类 号：TM934.15[电气工程—电力电子与电力传动]