Noise Measurement in Electrical Power Distribution Transformers

Ferreira, Jeferson Gonçalves; Finocchio, Marco Antônio Ferreira; Mendonça, Márcio; Geromel, Luiz Henrique

doi:10.1109/tla.2016.7786352

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…In electrical transformers, noise can be caused by different physical effects, such as the pile-up of magnetic sheets that form the core, the winding, and the air forced cooling systems [3,4], which combined may provoke really high levels of noise that would exceed the limits established by national and international standards. Some of the aggravating circumstances of the audible noise problem in transformers are the influence of noise outside the transformer that is added to the own transformer noise, the location of structures that amplify noise (e.g., the location of transformers in areas near noise reflecting surfaces), and the location in places where people are constantly around [5].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic vibration noise analysis of transformer windings and core

Liu

Liao

et al. 2016

IET Electric Power Applications

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Analyses of transformer electromagnetic vibration noise are presented in this study. A finite element model is established which combines transient electromagnetic field analysis, mechanical field analysis and acoustic analysis to calculate the sound pressure level of the radiated noise around the transformer. Transient electromagnetic field analysis is performed to get the Lorentz, reluctance magnetic forces and magnetostriction according to Maxwell theory and virtual displacement principle. Mutual influence of strain and magnetisation has been considered. The main frequency components of harmonic electromagnetic excitations are analysed by Fourier transformation so as to carry out the harmonic response analysis and obtain the nodes displacements of the windings and core. The noise distribution is further calculated by acoustic analysis based on the achieved vibration data. Comparison of calculated results and measured data verifies that the combined noise calculating model is applicable for transformer noise prediction.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic vibration noise analysis of transformer windings and core

Liu

Liao

et al. 2016

IET Electric Power Applications

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Research on the Acoustic Field Restoration of UHV Reactor Based on Equivalent Transfer Impedance

Li,

Wei,

Liao

et al. 2024

Lecture Notes in Electrical Engineering

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Capacitive Filter Based HVDC Converter for Reducing the Vibration and Noise of Converter Transformer

Zhao

Luo

et al. 2022

IEEE Access

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Harmonic currents generated by converters in the HVDC system flow into the converter transformer. The harmonic current and voltage in the converter transformer will cause electromagnetic vibration of windings and iron core, which result in serious noise pollution, power loss and electrical stressing. In this paper, a capacitive filter based HVDC converter is proposed to reduce the vibration and noise of converter transformer. First, the topology of the HVDC system is introduced, and its harmonic characteristics are analyzed. Then, the noise reduction mechanism by using capacitive filter is revealed by analyzing the relationship among harmonics, vibration, and noise of the converter transformer. Finally, the experimental platform of the capacitive filter based HVDC system is built. Moreover, the vibration and noise of the converter transformers are measured in a semi-anechoic chamber, with the use of line-commutated converter (LCC) and capacitive filter based HVDC converter respectively. The experimental results show that the vibration and noise of converter transformer using the capacitive filter are significantly suppressed compared with that using the LCC.

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Noise Measurement in Electrical Power Distribution Transformers

Cited by 4 publications

References 6 publications

Electromagnetic vibration noise analysis of transformer windings and core

Electromagnetic vibration noise analysis of transformer windings and core

Research on the Acoustic Field Restoration of UHV Reactor Based on Equivalent Transfer Impedance

Capacitive Filter Based HVDC Converter for Reducing the Vibration and Noise of Converter Transformer

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