Numerical analysis and experimental research of vibration and noise characteristics of oil-immersed power transformers

• Published in: Applied acoustics Vol. 203; p. 109189
• Main Authors: Miao, Xuhong, Jiang, Pei, Pang, Fuzhen, Tang, Yang, Li, Haichao, Qu, Guanglei, Li, Jun
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 28.02.2023
• Subjects: Electromagnetic noise; Electromagnetic vibration; FEM; Magnetostriction; Oil-immersed power transformer; Electromagnetic vibration; Oil-immersed power transformer; Magnetostriction; Electromagnetic noise; FEM
• ISSN: 0003-682X; 1872-910X
• DOI: 10.1016/j.apacoust.2022.109189

•An electromagnetic–mechanical-acoustic coupled three-dimensional finite element model is established for vibration and noise analysis of a 220 kV three-phase, three-winding oil-immersed transformer.•The vibration and noise experiment of a product-level three-phase three-winding transformer is conducted.•The effects of the radiating grilles and input voltage on the vibration and noise of an oil-immersed transformer are analyzed quantitatively. Oil-immersed power transformers play a prominent role in power grid system, and its vibration and noise influence the operation of the power grid. In this paper, an electromagnetic–mechanical-acoustic coupled three-dimensional finite element method of oil-immersed transformer is established. On this basis, according to a noise and vibration experiment of product-level oil-immersed power transformer, it not only proves the effectiveness of the calculation model, but also explores the influences of the radiating grilles and input voltage on the vibration and noise characteristics of the oil immersion transformer quantitatively. Research shows that the main frequency components of transformer vibration and noise focus on 100 Hz and its higher and integer multiple frequencies. The errors of total vibration acceleration level and overall sound pressure levels between the simulation results and test results do not exceed 3 dB, which verify the effectiveness of the numerical method.