杆塔接地电阻及土壤电阻率测量中存在的问题分析及改进措施  

Analysis of Existent Problems and Improving Measures in Measuring Tower's Grounding Resistance and Soil Resistivity

作　　者：颜喜平[1] 许根养[2] 敬亮兵[1] 张杰[2] 江龙才[2] 李景禄[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南省长沙市410076 [2]安徽池州供电局,安徽省池州市247000

出　　处：《电力设备》2008年第10期44-47,共4页Electrical Equipment

基　　金：安徽省电力公司项目:池州电网输电线路防雷技术研究。项目编号为2007050。

摘　　要：文章针对安徽池州供电局的4条110 kV输电线路杆塔接地电阻和土壤电阻率的测量误差,采用数据对比、理论计算的方法并配合电路模型,分析了测量误差的产生原因。结果表明:杆塔接地电阻的测量结果与辅助电压线、电流线的布线长度、方向以及测量时的天气等密切相关;ZC29B-1型接地电阻测量仪由于其内部结构特征,不适合作为测量土壤电阻率的工具。It is important for designing and maintaining the grounding device to measure accurately the tower＇s grounding resistance and soil resistivity of the transmission line. The principles and measurement of the tower＇s grounding resistance and soil resistivity were introduced in this paper, and the reasons of measure error aiming at the four 110 kV transmission lines in Chizhou Power Supply Bureau of An Hui province were analyzed by using data contrast, theoretical calculation and circuit models. The results indicate that measured value of the tower＇s grounding resistance and soil resistivity are nearly correlative to the weather, the length, the angle and the direction of assistant current and potential leads. The grounding ohmmeter of ZC29B-1 is unsuitable to measure soil resistivity because of its inside c onfiguration.

关 键 词：杆塔 接地电阻 土壤电阻率 接地电阻测试仪 测量误差 

分 类 号：TM862[电气工程—高电压与绝缘技术]