现场杆塔接地电阻和土壤电阻率测量存在问题及误差分析  

Problems in Tower Grounding Resistance and Soil Resistivity Measurement and the Error Analysis

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

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

出　　处：《电瓷避雷器》2008年第3期38-41,共4页Insulators and Surge Arresters

摘　　要：介绍了杆塔接地电阻和土壤电阻率的测量原理和测量方法,针对安徽池州供电局的4条110kV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,分析了杆塔接地电阻测量误差的产生原因。结果表明:杆塔接地电阻测量时,宜采用直线三级法;电流极的布线长度至少应达到接地网对角线的2倍;布线方向应尽量和塔体基座垂直;测量时应在晴朗天气下进行。The measurement principles and methods was introduced. Aimed at four 110 kV transmission lines of Chizhou power supply bureau, Anhui province, the causes of errors in tower grounding resistance and soil resistivity measurement were analyzed by data comparison, theoretical calculation and circuit modeling. The result shows that the triple linear method shall be preferably used in resis- tance measurement, with wiring length of current electrode at least twice of grounding grid diagonal. The wiring direction shall be perpendicular to tower base and the measurement shall be performed in fine weather.

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：TM934[电气工程—电力电子与电力传动]