【摘要】 为了解决小电流接地系统选线难的问题,在对小电流接地系统单相接地故障的特点进行详细分析的基础上,提出通过综合比较各线路的故障相和非故障相的5次谐波电流突变量以及本线路和相邻线路故障相的5次谐波电流突变量两个判据进行故障选线。对故障后5 s和故障前1 s的数据之差进行傅里叶滤波得到5次谐波电流突变量。利用所提方法做了大量的仿真试验,结果表明,该选线方法不受暂态过程、故障点过渡电阻、线路长度等因素的影响,可以正确选线。更多还原

【Abstract】 Based on the detailed analysis of SLG fault characteristics in distribution power system,a new fault line selection method is proposed in this paper.The fifth harmonic current mutation is employed to select the faulted line.ATP simulation results indicate that this fault line selection method is not influenced by such factors as the transient characteristics of the fault,fault resistance,length of the faulted line,etc.更多还原