A Location Method of Partial Discharge Based on Truncated Singular Value Decomposition and K-Medians

被引：0
|
作者：
Ning S. [1 ]
He Y. [1 ,2 ]
Liu Q. [1 ]
Sui Y. [1 ]
机构：
[1] School of Electrical Engineering and Automation, Hefei University of Technology, Hefei
[2] School of Electrical Engineering and Automation, Wuhan University, Wuhan
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2022年 / 37卷 / 13期
关键词：
K-Medians; linear transformation; location; Partial discharge (PD) source; pretreatment; truncated singular value decomposition (TSVD);
D O I：
10.19595/j.cnki.1000-6753.tces.210623
中图分类号：
学科分类号：
摘要：
Aiming at the problem that the time difference of arrival (TDOA) error of UHF signal is large in a complex environment, which leads to the inaccurate solution of nonlinear equation, a PD source location method is proposed which based on truncated singular value decomposition (TSVD) and K-Medians. First, PD signal is obtained via UHF antenna, and TDOA information is extracted by energy accumulation. Second, as for the difficulty and inaccuracy of solving linear equations, the random combination linear transformation method is proposed. The nonlinear localization equations are transformed into linear equations, and the influence of coordinate system selection on the location equation is eliminated via pretreatment technology. Then, the TSVD regularization algorithm is used to solve the linear equation, and the K-Medians clustering algorithm is introduced to optimize the TSVD regularization algorithm. The PD source coordinate location is realized in the substation. Finally, the proposed method is analyzed through theoretical verification and field experiments. The experimental results verify the feasibility and accuracy of the proposed method. © 2022 Chinese Machine Press. All rights reserved.
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页码：3441 / 3452
页数：11
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