钳表法测量输电线路杆塔接地电阻的误差仿真分析  

Simulation analysis on error of grounding resistance measurement using clamp meter for transmission towers

作　　者：周辉如[1] 

机构地区：[1]湖南省电力公司湘西电业局,湖南吉首416000

出　　处：《湖南电力》2013年第3期18-22,共5页Hunan Electric Power

摘　　要：根据钳表法原理,对输电线路杆塔进行建模及仿真计算,将基于钳表法原理的多基杆塔回路电阻值与单基杆塔理论接地电阻值进行对比,对误差的影响因素及其敏感性进行分析。结果表明:在较低土壤电阻率时避雷线等导体的电阻为造成误差的主要因素,而较高土壤电阻率时杆塔地网与杆塔基础间的互电阻为造成误差的主要因素。Based on clamp meter method, transmission tower model is established and simulated in this paper. The multi-tower loop resistance and theoretical value of tower grounding resistance are compared and the error factor and its sensitivity are analyzed as well. The result indicates that resistance of conductor such as lighting conduct etc. is the major factor which causes the error in lower earth resistivity, and in high earth resistivity the mutual resistance between the tower grounding grids and tower base is the major factor of error.

关 键 词：输电线路 杆塔 接地电阻 回路阻抗 钳表法 测量误差 互电阻 

分 类 号：TM751[电气工程—电力系统及自动化]