超高压线路单端行波故障定位系统的研究

为了使电力系统在发生故障后能准确定位,研制和开发了基于百兆高速数据采集系统的单端行波故障定位系统,从而使采样导致的误差减小到3m。它利用小波分析的方法来识别故障暂态行波到达观测母线产生的奇异点,通过“波形比较法”来去除相邻母线和对端母线的干扰,从而能够较准确地提取两次故障暂态行波到达的时刻,实现超高压传输线的故障定位。

Research on Single Terminal Travelling Wave Fault Location System for EHV Transmission Line

This paper introduces a single-terminal travelling wave fault location system based on high speed data acquisition system. It lowers the error originated from the acquisition system to 3 m. Singularity point is identified by wavelet transformation on the travelling wave coming from the fault position. The interferences coming from the adjacent and the opposite buses can be eliminated by waveform comparison method. As a result, the time difference of travelling wave propagation can be evaluated accurately, hence realizing the fault location of EHV transmission line.