缩短测量引线测量大型接地网接地电阻的方法  

Grounding resistance measurement method of large grounding grids with short current wire

作　　者：刘渝根[1] 余晓东[1] 宋兹楠 苏玉萍[1] 田金虎[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]贵州安顺供电局,贵州安顺561000

出　　处：《重庆大学学报（自然科学版）》2009年第11期1280-1284,共5页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(59677016)

摘　　要：针对0.618法测量大型接地网接地电阻存在测量引线过长的缺点,采用计算机数值方法对大量不同形状、不同面积及不同布置方式的接地网地面电位分布进行计算和分析,提出将接地网等效为直径等于接地网长边长度的圆盘接地极,取测量电流极引线长度为1倍地网长边长度,电压极引线为0.509倍电流极引线长度来测量接地电阻的新方法。通过对实际接地网接地电阻的测量结果表明:该方法克服了0.618法测量引线过长的缺点,且测量结果准确,适用于大型接地网接地电阻的测量。The 0.618 method for grounding resistance measurement has long wire lead defect. By calculating and analyzing the ground-potential of a large number of grounding grids which are different in shape, area and rod-arrangement style using computer numerical method, it presents that the grounding grids can be equivalent to disc shape grounding electrodes. A new method of grounding resistance measurement is presented that taking the current-electrode wire as long as the longer side length of grounding grids and voltage-electrode wire as 0. 509 times long as the current-electrode wire. The measurement accuracy of this method is testified by experiment in field. The proposed method has much shorter wire than 0. 618 method, it is suited to grounding resistance measurement of large grounding grids.

关 键 词：接地网 接地电阻 测量 数值方法 

分 类 号：TM835[电气工程—高电压与绝缘技术]