Analysis Method for Mixed Faults in Winding Based on Multi-index Fusion

被引：0
|
作者：
Fu Q. [1 ]
Ning W. [1 ]
Liu D. [1 ]
机构：
[1] School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha
来源：
Gaodianya Jishu/High Voltage Engineering | 2021年 / 47卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Fault diagnosis; Frequency response analysis; Multi-index fusion; Transformer; Winding deformation;
D O I：
10.13336/j.1003-6520.hve.20200310003
中图分类号：
学科分类号：
摘要：
Frequency response analysis is one of the most common methods for diagnosing transfor-mer winding deformation faults. The existing frequency response analysis method has achieved good diagnostic results for a single type of winding deformation faults. However, when the transformer winding has mixed deformation faults, the existing method is less ef-fective in diagnosing the winding deformation. Consequently, we analyzed the characteristics of transformer frequency response curve when mixed deformation faults occurred in transformer windings, and proposed a method based on the fusion of the ratio of the maximum RED to the minimum RED (MMR) and the frequency response curve offset area ratio to diagnose transformer winding deformation faults. The MMR, which has a clear judgment limit for winding axial and radial faults, is used as the determinant for the first fault diagnose layer in this method. In the second fault diagnosis layer, the ratio of shifting area of frequency response curve that is more sensitive to mixed faults is utilized to achieve the purpose of distinguishing single or mixed faults of transformer windings. The simulation results show that, compared with other methods for single fault research, the fu-sion multi-index method has a better recognition rate when the windings have mixed faults. © 2021, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：537 / 545
页数：8
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