对不受波速影响的输电线路单端行波法故障测距的探讨

Discussions on the single ended approach based on travelling wave to fault location that can avoid the effect of wave speed

在不受波速影响的行波法测距研究中,必须注意研究暂态初始行波、故障点反射波、对端母线反射波相互间的极性关系。而波形处理工具也将影响测距结果。该文通过分析故障初始行波、故障点反射波、对端母线反射波的极性关系来区别不同的行波分量,以暂态电流行波为分析对象,并用数学形态学检测故障波形,对不受波速影响的单端测距算法进一步研究。

It needs to analyze the polarities of the initial traveling wave, reflected ones from the fault point and the opposite bus when studying the approach based on travelling wave to fault location that carl avoid the effect of wave speed. The waveform processing has some influences on the fault location. By analyzing the polarities of the initial traveling wave, reflected ones from the fault point and the opposite bus, different components in the travelling waves can be distinguished. Further studies on the single ended approach avoiding the effect of wave speed is described in this paper. The transient current travelling wave will be analyzed to determine the fault position, and mathematical morphology is utilized to detect fault waveform.