基于EMD-TEO的输电线路行波故障定位  

Traveling wave based fault location for transmission lines based on EMD-TEO

作　　者：范新桥[1] 朱永利[1] 卢伟甫[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电力系统保护与控制》2012年第9期8-12,17,共6页Power System Protection and Control

基　　金：国家自然科学基金资助(60974125)~~

摘　　要：针对利用希尔伯特-黄变换(HHT)分解所得IMF分量的瞬时频率可能导致波头检测不准确或检测失败的缺陷,提出了基于EMD-TEO的输电线路行波故障定位方法。首先对行波线模分量进行EMD分解,然后利用Teager能量算子(TEO)计算出分解所得IMF1分量的瞬时能量谱,根据首个能量突变点确定出故障初始行波的到达时刻。最后,根据双端行波定位原理计算出故障距离。从对不同故障情况的仿真结果看,所提EMD-TEO法具有更好的波头检测效果,且用于故障定位具有较高的定位精度。In view of the problem that the instantaneous frequency of Intrinsic Mode Function obtained by Hilbert-Huang Transform may result in incorrect traveling wave arrival time detection, a traveling wave based fault location scheme for transmission lines is proposed based on EMD-TEO. The Empirical Mode Decomposition （EMD） is applied to aerial mode component of current traveling wave, and the TEO is applied to the first Intrinsic Mode Function （IMF1） obtained through EMD. Then the first arrival time of traveling wave can be determined according to the first sudden arising of energy in the instantaneous energy spectrum of IMF1. Finally, the two-terminal traveling wave fault location principle is used to calculate the fault distance. The simulation results of different fault conditions show that the EMD-TEO method has better effect in detecting the arrival time of traveling wave and higher accuracy in fault location.

关 键 词：行波 故障定位 经验模态分解 TEAGER能量算子 

分 类 号：TM755[电气工程—电力系统及自动化]