期刊
APPLIED ACOUSTICS
卷 114, 期 -, 页码 136-146出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apacoust.2016.07.024
关键词
Transformer winding; Electromagnetic force; Vibration model; Clamping force; Winding deformation
类别
资金
- National Natural Science Foundation of China [11504324]
- Science and Technology Project of Zhejiang Province [2013C31008]
- Science and Technology Project of State Grid Zhejiang Electric Power Company [5211MR15003V]
In this paper, the vibration of power transformer windings is studied with the aim of identifying the winding structural condition. A winding vibration model coupled with electromagnetic force analysis is proposed to obtain the steady-state vibration distribution along the axial direction. During the experiment, the model was validated on a full size, 50 MVA, three phase power transformer. Good agreement was found between the measured vibrations and the vibrations that were calculated from the model developed in this study for a healthy winding. The effect of the winding clamping force on vibration is studied to assess the winding clamping state, and different types of winding deformations were simulated to extract diagnostic information. The preliminary study shows that it is feasible to predict the mechanical faults of transformer windings with the vibration method. (C) 2016 Elsevier Ltd. All rights reserved.
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