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

Xiaomu Duan, Tong Zhao, Jinxin Liu, Li Zhang and Liang Zou
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Xiaomu Duan: School of Electrical Engineering, Shandong University, Jinan 250061, China
Tong Zhao: School of Electrical Engineering, Shandong University, Jinan 250061, China
Jinxin Liu: State Grid, Jining Power Supply Company, Jining 272000, China
Li Zhang: School of Electrical Engineering, Shandong University, Jinan 250061, China
Liang Zou: School of Electrical Engineering, Shandong University, Jinan 250061, China

Energies, 2018, vol. 11, issue 9, 1-19

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.

Keywords: power transformer winding; vibration characteristics; multiphysical field analysis; short-circuit experiment; winding-fault characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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