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10 kV铁路自闭/贯通线路多采用中性点非有效接地方式,供电臂长、沿线环境恶劣,故障(特别是小电流接地故障)频繁发生、故障位置不易查找.为了解决自闭/贯通线路故障自动定位问题,分析了自闭/贯通线路电气结构的特殊性,以行波理论为基础研究了接地故障和相间短路故障产生的暂态电压、电流行波特征,发现接地故障和相间短路故障都存在参数比较稳定的行波线模分量.详细分析了行波在不同结构线路末端的反射规律以及行波在不同线路结构中的传播规律,分析结果为行波测距原理应用到自闭/贯通线路故障定位的研究提供了理论基础.
In order to solve the problem of autistic / through-the-road, the 10 kV railway autoban and through circuit mostly use neutral point non-effective grounding mode, the arm length is long and the environment along the line is bad, faults (especially small current ground fault) frequently occur, Based on the traveling wave theory, the characteristics of transient voltage and current traveling wave generated by earth fault and interphase short circuit fault are analyzed. It is found that earth fault and interphase short fault The parameters of traveling wave mode with relatively stable parameters exist.The law of reflection of traveling wave at the end of different structure lines and the propagation law of traveling wave in different line structures are analyzed in detail.The results of the analysis are the application of traveling wave ranging principle to autistic / Through-line fault location provides a theoretical basis.