Transmission of Vibrations from Windings to Tank in High Power Transformers

Pawel Witczak () and Michal Swiatkowski
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Pawel Witczak: Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland
Michal Swiatkowski: Hitachi Energy, 91-205 Lodz, Poland

Energies, 2023, vol. 16, issue 6, 1-12

Abstract: This article presents a step-by-step methodology for calculating transformer tank vibrations caused by electromagnetic forces. This approach uses 3D finite element models for both magnetic and structural calculations. Particular attention was paid to the description of momentum transfer between structural and fluid areas of the transformer. The actual geometry of the coils in the phase windings was taken into account. The dominant role of the axial component of the Lorentz force is the main conclusion of the article. The results are given in the form of three-dimensional displacement fields of the transformer tank presented together with the acoustic pressure field in the oil. The theoretical analysis is verified by laser-scanned vibration patterns on the tank wall.

Keywords: power transformer; finite elements; electromagnetic forces; structural vibration; fluid vibration (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: 2023
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