林芳雯;吴俊勇;郝亮亮;

• 1:北京交通大学电气工程学院

摘要(Abstract)：

当直流配电电缆发生故障时,直流断路器将故障电缆隔离,为快速排除故障恢复供电,需要快速准确地确定故障点的位置。针对单极接地故障,提出一种基于视在伪阻抗辨识的直流配电电缆单端在线故障定位方法,将故障定位模块与故障电缆串联,使得电缆中流过振荡衰减电流,利用Prony算法提取定位端电缆电压与电流的特征参数,辨识出当前故障情况下的视在伪阻抗;以故障距离和故障点过渡电阻为变量,推算出基于?电缆模型的等效伪阻抗;利用视在伪阻抗和等效伪阻抗的实部和虚部分别相等判据,计算出故障距离和过渡电阻。仿真结果表明,所提出的方法能准确有效地定位故障点,并考虑了电缆的分布电容,具有较好的实用性。

关键词(KeyWords)： 直流配电网;故障定位;Prony算法;视在伪阻抗;等效伪阻抗

Abstract:

Keywords:

基金项目(Foundation): 北京市科技计划课题资助项目(D131104002013003);; 中央高校基本科研业务费专项基金资助项目(E15JB00140)~~

作者(Author): 林芳雯;吴俊勇;郝亮亮;

Email:

DOI: 10.13335/j.1000-3673.pst.2016.08.044

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