刘鹏辉;黄纯;

• 1:湖南大学电气与信息工程学院

摘要(Abstract)：

动态时间弯曲(dynamic time warping,DTW)距离可度量2个时间序列的相似性,且具有良好的耐同步误差特性和容错特性。配电网发生单相接地故障时,流过线路健全区段两侧的暂态零序电流几乎为同一电流,采样数据差异小,DTW距离也较小;而流过故障区段两侧的暂态零序电流存在明显差异,DTW距离较大;据此,提出一种基于暂态零序电流数据DTW距离的配电网小电流接地故障区段定位方法。当各馈线终端(feeder terminal unit,FTU)启动算法检测到接地故障发生后,将检测到的故障前后共1个工频周期的暂态零序电流采样数据上传主站,主站基于给定的故障区段搜索策略,通过计算相关暂态零序电流的DTW距离确定故障所在区段。该方法区段搜索效率高,故障定位速度快,各FTU启动时间同步误差及上传数据误码对定位准确性影响小。仿真结果验证了所提方法的正确性与有效性。

关键词(KeyWords)： 配电网;动态时间弯曲;小电流接地故障;故障区段定位;馈线终端

Abstract:

Keywords:

基金项目(Foundation): 国家863高技术基金项目(2011AA05A114)~~

作者(Author): 刘鹏辉;黄纯;

Email:

DOI: 10.13335/j.1000-3673.pst.2016.03.042

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