Fault location of a DC distribution network based on a direct time reversal method

被引：0
|
作者：
Yang H. [1 ]
Zhu Z. [1 ]
Huang W. [2 ]
Yu W. [1 ]
Zhou S. [1 ]
机构：
[1] Shanghai University of Electric Power, Shanghai
[2] Key Laboratory of Power Transmission and Transformation Control, Ministry of Education, Shanghai Jiao Tong University, Shanghai
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2022年 / 50卷 / 16期
基金：
中国国家自然科学基金;
关键词：
direct time reversal; fault location; signal reconstruction; T-line; topology of point-to-point MVDC distribution network;
D O I：
10.19783/j.cnki.pspc.211335
中图分类号：
学科分类号：
摘要：
There is a problem of deviation in fault location caused by uneven distribution of electrical energy in a DC distribution network. Focusing on the frequency band distribution characteristics of current mutation, a direct time reversal method is used to transform the distance problem into the response of the point current source field, and the translation invariance of a discrete dyadic wavelet is used at the same time. The time reversal fault transient traveling wave signal is reconstructed by the modulus maxima of the high-frequency component of the traveling wave signal in the form of pulse excitation. Its sharp change points are characterized accordingly, highlighting the characteristics of energy distribution. This is not limited by having little malfunction data. The applicability of the method in the main feeder and T-line is proved theoretically. The ±15 kV topology of a point-to-point MVDC distribution network model is built in PSCAD/EMTDC, and fault simulation and data acquisition verification are carried out considering the change of transition resistance and the influence of different fault types. The results show that the proposed method can realize the location in a short time window of 5 ms, and it has good anti transition resistance ability, which can reflect the change of electromagnetic energy of fault lines in different working conditions. © 2022 Power System Protection and Control Press. All rights reserved.
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页码：66 / 75
页数：9
相关论文
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