基于数学形态学的输电线路单端行波故障测距研究  

Fault Locating of on Single Terminal Traveling Waves for Transmission Lines Based on Mathematical Morphology and Correlation Function

作　　者：刘万超[1] 陈平[1] 孙佳佳[2] 祝成 马永明[1] 

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,济南250013 [3]德州电力公司调度中心,山东德州253024

出　　处：《电网与清洁能源》2009年第4期29-33,共5页Power System and Clean Energy

摘　　要：提出了一种用于单端行波故障测距的多分辨相关函数算法和用于处理实际行波的形态滤波结构元素选择方案。该相关算法采用多时窗处理方式,着力解决宽时窗下相关算法容易出现极值点偏移问题。针对实际故障线路中行波相关法容易受行波波形畸变影响的问题,利用数学形态学设计了前置滤波器,该滤波器较好地抑制了行波波形的畸变,同时保持了行波的主要特征。在有效滤波的基础上采用具有多分辨能力的行波相关法,实现了单端行波故障测距可靠性和准确性的统一。通过对输电线路实测故障数据的处理,证明该方案能同时保证测距可靠性和准确性,具有很高的实用价值。A multi-resolution conelatinn function algorithm whiuh used for fault location of single terminal traveling waves and a selection of filter elements used to deal with the actual shape of the traveling wave are presented. The mulli-window approach is used in the eorrelation algorilhm to resolve Ihe possible migration of extreme points in wide window . Using mathematical morphology, a pre-filter is designed aiming at the issue thai wave-relaled algorithm is vulnerable to wave distortion on actual faull lines. The pre-filler ean effectively bate the distortion of traveling uave , while maintain the main features of the Iraveling waves. The mullti-resolution wave-related algorithms are used on the basis of effeetive filtering to aehieve a unification of aeeurae＇, and reliability of fault loeation based on traveling waves of single terminal. Bydealing with the actual traveling waves in fault transmission lines, the precept was proved thai it can assure the reliability and aeeuracy of Ioeation. and is of high praetieal value.

关 键 词：数学形态学 输电线路 行波 故障测距 

分 类 号：TM773[电气工程—电力系统及自动化]