基于多时窗相关函数和形态学滤波的单端行波故障测距研究  

Study of fault locating based on single terminal traveling waves using multi-window correlation functions and mathematical morphological filtering algorithm

作　　者：刘万超[1] 陈平[1] 马永明[1] 孙佳佳[2] 祝成 

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255049 [2]山东电力工程咨询院,山东济南250013 [3]德州电力公司继保班,山东德州253024

出　　处：《电力系统保护与控制》2009年第20期28-33,共6页Power System Protection and Control

摘　　要：提出了一种基于多时窗相关函数和形态学滤波的输电线路单端行波故障测距算法。由于存在"高频振荡"的原因,多时窗相关函数法在短时窗下容易将线路故障误判为近距离故障。采用形态学滤波器,较好地抑制了行波中的"高频振荡",使多时窗相关函数法在任何时窗宽度下都能给出正确的测距结果。该方案解决了固定时窗下的相关函数法容易出现极值点偏移及近距离故障难以测距的问题。通过对实测故障数据的分析验证,证明该方案能同时保证测距可靠性和准确性,具有较高的实用价值。A fault location algorithm of multi-window correlation functions and mathematical morphological filtering is presented which is based on traveling waves of single terminal. Because of existing ＂high frequency oscillation＂, the algorithm of multi-window correlation functions is easy to judge that the fault location is closed to the bus. Using morphological filters can suppress the ＂high frequency oscillation＂ well which is in the traveling waves, so that the algorithm of multi-window correlation functions can give the correct location in any width of time window. The project solves the problems that the extreme points of correlation function under fixed time window easy moves and can＇t find the close fault location. Through measuring the actual data on fault transmission lines, the precept is proved that it could assure the reliability and accuracy of location at the same time, and is of high practical value.

关 键 词：相关函数 形态学滤波 输电线路 行波 

分 类 号：TM755[电气工程—电力系统及自动化]