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Energies 2018, 11(9), 2404; https://doi.org/10.3390/en11092404

Analysis of Winding Vibration Characteristics of Power Transformers Based on the Finite-Element Method

1
School of Electrical Engineering, Shandong University, Jinan 250061, China
2
State Grid, Jining Power Supply Company, Jining 272000, China
*
Author to whom correspondence should be addressed.
Received: 25 August 2018 / Revised: 6 September 2018 / Accepted: 7 September 2018 / Published: 11 September 2018
(This article belongs to the Special Issue Intelligent Control in Energy Systems)
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Abstract

The winding is the core component of a transformer, and the technology used to diagnose its current state directly affects the operation and maintenance of the transformer. The mechanical vibration characteristics of a dry-type transformer winding are studied in this paper. A short-circuit test was performed on an SCB10-1000/10 dry-type transformer, and the vibration signal at the surface was measured. Based on actual experimental conditions, a vibration-simulation model of the transformer was established using COMSOL Multiphysics software. A multiphysics coupling simulation of the circuit, magnetic field, and solid mechanics of the transformer was performed on this model. The simulation results were compared with measured data to verify the validity of the simulation model. The simulation model for a transformer operating under normal conditions was then used to develop simulation models of transformer-winding looseness, winding deformation, and winding-insulation failure, and the winding fault vibration characteristics were analyzed. The results provide a basis for detecting and analyzing the mechanical state of transformer windings. View Full-Text
Keywords: power transformer winding; vibration characteristics; multiphysical field analysis; short-circuit experiment; winding-fault characteristics power transformer winding; vibration characteristics; multiphysical field analysis; short-circuit experiment; winding-fault characteristics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Duan, X.; Zhao, T.; Liu, J.; Zhang, L.; Zou, L. Analysis of Winding Vibration Characteristics of Power Transformers Based on the Finite-Element Method. Energies 2018, 11, 2404.

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