Single-phase to ground fault location of hybrid transmission lines based on empirical wavelet transform

被引：0
|
作者：
Tao C. [1 ]
Du X. [1 ]
Gao F. [1 ]
Wan Y. [1 ]
Yang Q. [1 ]
机构：
[1] School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2021年 / 49卷 / 10期
关键词：
Empirical wavelet transform; Fault location; Overhead-cable hybrid transmission lines; Singularity detection; Transient information; Traveling wave;
D O I：
10.19783/j.cnki.pspc.200845
中图分类号：
学科分类号：
摘要：
To solve the serious problem of spectrum aliasing caused by discontinuous wave impedance routing of an overhead-cable hybrid transmission line, a single-phase ground fault location method based on Empirical Wavelet Transform (EWT) is proposed. First, the EWT is used to decompose the transient zero sequence current traveling wave generated by the fault to get the low-frequency component. Then, fault line selection of the hybrid transmission line is carried out with a low-frequency component line selection criterion. By analyzing the singularity detection results, the traveling wave head of the fault line is accurately calibrated. Finally, the fault location of hybrid transmission lines in distribution networks is realized by the principle of single-terminal traveling wave location. PSCAD/Matlab simulation results show that the method has high accuracy, and the fault location accuracy is within 200 m, which meets the requirements of engineering practice. © 2021 Power System Protection and Control Press.
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页码：105 / 112
页数：7
相关论文
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