综合利用故障产生的暂态行波对电缆单环网进行测距分析。对单环网的整体结构进行划分，提出单环网测距方案。针对T型电缆线路提出具体测距原理，根据故障行波到达各测量端的时间差计算初步测距结果，判断T型电缆内、外部故障区段，在确定区段的基础上由初步测距结果得到故障点的精确位置。利用格鲁布斯检验法对测距结果进行筛选，应用三次B-样条小波和模极大值理论得到行波的准确到达时间。仿真结果表明了该测距原理及方案的可行性和准确性。%The comprehensive transient traveling wave generated by fault is utilized in the analysis of single ring cable feeder location. The structure of single ring cable feeder is classified and the location scheme for single ring cable feeder is presented. The location principle is presented for T-type cable lines; according to the difference of the traveling wave’s arrival time, the initial location data is calculated, and the fault branch can be conjectured;on this basis, the precise location is obtained by the initial location data. The location results are screened by Grubbs test, and the precise arrival time of traveling wave is obtained by the theories of cubic B-spline wavelet and modulus maximum. The simulation results show the feasibility and the accuracy of the location principle and scheme.
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