基于动态时间弯曲距离的谐振接地系统高阻接地故障区段定位方法  

Fault Section Location Method for High Impedance Grounding in Resonant Grounding System Based on Dynamic Time Warping Distance

作　　者：詹启帆 李天友 蔡金锭[1] 

机构地区：[1]福州大学电气工程与自动化学院,福建福州350116 [2]国网福建省电力有限公司,福建福州350003

出　　处：《供用电》2018年第1期46-51,73,共7页Distribution & Utilization

摘　　要：配电网高阻接地故障时故障电流较小,使得故障定位有了较大的难度。通过提取各检测点纯暂态零序电流以及母线纯暂态零序电压,利用暂态投影法将各检测点的纯暂态零序电流投影到母线纯暂态零序电压后,计算相邻采样点的投影电流动态时间弯曲距离进行区段定位。仿真结果表明,该定位算法在不同情况下具有较高的区段定位准确率。The fault current is small when high impedance fault in distribution network happens, which makes it difficult to detect the fault location. On the basis of extracted pure transient zero sequence current and bus pure transient zero sequence voltage of the detecting points, transient projection method is used to project the pure transient zero sequence current of the detecting points to bus pure transient zero sequence voltage. Then, the section location is achieved by calculating the projecting current dynamic time warping distance. The simulation results show that the location algorithm has high accuracy under different situations.

关 键 词：谐振接地系统 高阻接地故障 暂态投影法 动态时间弯曲距离 故障区段定位 

分 类 号：TM77[电气工程—电力系统及自动化]