A Location Method of Partial Discharge Based on Truncated Singular Value Decomposition and K-Medians
Ning Shuguang1, He Yigang1,2, Liu Qianqian1, Sui Yongbo1
1. School of Electrical Engineering and Automation Hefei University of Technology Hefei 230009 China; 2. School of Electrical Engineering and Automation Wuhan University Wuhan 430072 China
Abstract：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.
宁暑光, 何怡刚, 刘倩倩, 隋永波. 基于截断奇异值分解与K-Medians的局部放电源定位方法[J]. 电工技术学报, 2022, 37(13): 3441-3452.
Ning Shuguang, He Yigang, Liu Qianqian, Sui Yongbo. A Location Method of Partial Discharge Based on Truncated Singular Value Decomposition and K-Medians. Transactions of China Electrotechnical Society, 2022, 37(13): 3441-3452.
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2022, Vol. 37 
