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Prediction of Outdoor Noise Propagation Induced By Single-Phase Power Transformers

Xueyun Ruan1,2, Wei Huang1, Linke Zhang3, Yan Gao2,*

1 School of Mechanical Engineering, Anhui University of Science and Technology, Anhui Huainan, 232000, China.
2 Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100190, China.
3 School of Energy and Power Engineering, Wuhan University of Technology, Hubei Wuhan, 430063, China.
* Corresponding Author: Yan Gao. Email:

Sound & Vibration 2019, 53(1), 2-13.


Outdoor power transformers are one of the most pervasive noise sources in power transmission and distribution systems. Accurate prediction of outdoor noise propagation plays a dominant role for the evaluation and control of noise relevant to the transformer stations. In this paper surface vibration tests are carried out on a scale model of a single-phase transformer tank wall at different excitation frequencies. The phase and amplitude of test data are found to be randomly distributed when the excitation frequency exceeds the seventh mode frequency, which allows the single-phase power transformer to be simplified as incoherent point sources. An outdoor-coherent model is subsequently developed and incorporated with the image source method to investigate noise propagation from single-phase power transformers, due to the occurrence of multiple reflections and diffractions in the propagation path of each point source. The proposed model is used to calculate the sound field of the power transformer group by exploiting the additional phase information. In comparison with the ISO9613 model and the boundary element method, it is found that the proposed coherent image source method leads to more accurate prediction results, and hence better performance for the prediction of the outdoor noise induced by single-phase power transformers.


Cite This Article

Ruan, X., Huang, W., Zhang, L., Gao, Y. (2019). Prediction of Outdoor Noise Propagation Induced By Single-Phase Power Transformers. Sound & Vibration, 53(1), 2–13.

cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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