小电流接地系统故障测距的方法研究

提出一种小电流接地系统故障测距的方法。该方法向线路注入高压脉冲直流信号,利用行波的折反射原理,通过比较在正常和故障线路上传播的高频暂态行波波形情况,并对检测到的反射行波进行滤波处理,找出差异点,从而确定故障点位置。大量仿真结果及现场试验证明,该方法在一定范围内确实可行。

Study on Fault Location Method in Small Current Neutral Grounded System

A approach about fault location in small current neutral grounding system is proposed . A high DC impulse voltage singnal is inserted in the line in the method. Based the principle of reflect and refraction of travelling wave and through comparing the high frequency transient traveling wave promulgating in the line of common and failure,the different point of them and the fault location can be found in the line.A large amount of simulation results and experiments done in transform distribution show that the method is avilalble in some areas.