缩短测量引线测量大型接地网接地电阻的方法

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.

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

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 volta...