高阻接地短路的精确测距方法

ACCURATE FAULT LOCATION TECHNIQUE FOR PHASE GROUND FAULT THROUGH HIGH IMPEDANCE

提出一种高阻接地时，利用单端参数进行精确测距的方法。该法只需利用流过保护安装处的故障相的序参数，经过简单处理即可得到故障距离。大量仿真实验证明，此方法测距的最大误差小于３％，平均误差为１．２％，而且运算量小。

This paper presents an accurate location technique for phase ground fault through high impedance using one terminal parameters. With sequence parameters of the fault phase at the relay only, fault distance can be easily achieved after simple calculation. A number of simulation tests show this technique has not only the high accuracy, with maximum error of less than 3 percent and average error 1 2 percent respectively, but also the advantage of less computational efforts, which makes it very suitable for the real time calculation.