摘要
综合利用T型线路的三端电气量进行故障定位,提出了故障分支判别的判据以及确定故障点精确位置的方法.利用小波变换和模极大值理论对提取的行波进行分析,得到行波波头到达的准确时间.利用行波到达各测量端的时间差判断故障分支,在此基础上利用包含故障分支的初步测距值求取测距结果.PSCAD仿真表明,该方法可准确判断T型线路的故障分支,测距误差较小,能够满足实际需要.
Utilizing the comprehensive terminal measurement data of T-type lines, an algorithm for branch selecting and fault locating is proposed. The difference of the traveling-wave arrival time is used to judge the fault branch,and the initial location data including fault branch is used to calculate the location result on this basis. By using wavelet transform and modulus maxima theo- ry, the extracted traveling wave is analyzed, and the exact arrival time of the wave head is ob- tained. The PSCAD simulation results show that this approach is the effectiveness in the fault line branch selection and the location error is small, and it can satisfy the requirement.
出处
《山东理工大学学报（自然科学版）》
CAS
2012年第6期74-77,共4页
Journal of Shandong University of Technology:Natural Science Edition
基金
山东电力集团公司科技项目(2011C-13-4)
关键词
行波
故障测距
T型线路
小波变换
traveling-wave fault location T-type transmission lines wavelet transform
