关联维数分析法在高压输电线故障分类与测距中的应用  

Application of correlative dimension analysis in fault classification and location of transmission line

作　　者：李炜[1] 刘文莉[2] 陈玉武[1] 

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050 [2]兰州工业高等专科学校电气工程系,甘肃兰州730050

出　　处：《兰州理工大学学报》2010年第1期71-77,共7页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(096RJZA101)

摘　　要：基于关联维数分析方法对输电线路故障检测、分类与测距进行研究.通过计算和分析比较输电线路正常和各类故障下电压行波的关联维数,得到用于故障检测的关联维数阈值Dth,为进一步判断故障是否接地,引入接地评价指标(Index)th,实现对高压输电线路故障的初步分类;进而基于变步长关联维数突变时刻搜索算法捕捉故障发生时行波到达线路两端的时间差Δt,并以双端行波测距法进行故障测距.最后以仿真验证关联维分析法在高压输电线路故障检测、分类和测距中的有效性.The correlative dimension analysis was used to investigate the detection, classification and location of fault in transmission line. First of all, the correlative dimension of voltage travelling wave was calculated, analyzed, and compared for the transmission line operating in normal and fault condition, so that the threshold Dth of the correlation dimension was found for fault detection. In order to further determine whether there is grounding fault, a grounding evaluation index （Index）th was introduced and the preliminary classification of fault in high-voltage transmission line was realized. Then the time difference At of arrival of travelling wave at the two ends of the fault line was seized by using the searching method for sudden change of correlative dimension with variable step, and the double terminal method of traveling wave is used for fault location. It was varified by simulation test that the method of correlative dimension analysis was effective for detection, classification, and location of the fault in high-voltage transmission lines.

关 键 词：高压输电线路 关联维数 双端行波法 故障检测 故障分类 故障测距 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]