A study on the noise reduction method of transformer using harmonic response analysis

Chang-Seop Kim; Won-Jin Kim

doi:10.7776/ASK.2024.43.3.277

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2024 Vol.43, Issue 3 Preview Page Next Page

Research Article

A study on the noise reduction method of transformer using harmonic response analysis 조화응답해석을 이용한 변압기의 소음저감 방법에 관한 연구

31 May 2024. pp. 277-284

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Abstract

This study proposes a method to predict noise reduction based on noise-reduction measures, using harmonic response analysis, for transformer design. The dynamic elastic coefficients of the components comprising the actual transformer were determined by manufacturing the materials of the transformer components into simple-shaped specimens, followed by a comparison of the modes between the experiments and the analyses. A finite element model of the transformer was implemented, and harmonic response analysis was performed by deriving the exciting force of the transformer. Subsequently, the theoretical sound power level of the transformer was derived from the results of the harmonic response analysis. Finally, noise reduction measures were established, and the noise reduction amounts were compared between the experiments and the analyses, before and after applying the measures. Through the comparison and analyses of the noise reduction measures, it was confirmed that the trends in the experiments and analyses matched.

Keywords

Harmonic response analysis

Structure borne noise

Noise reduction method

Noise prediction

본 연구에서는 변압기 설계에 활용하기 위해 조화응답해석을 이용하여 소음저감 대책에 따른 소음 저감 예측 방법을 제안한다. 변압기 부품들의 재질을 간단한 형상의 시편으로 제작하고, 실험과 해석의 모드 비교분석을 통해 실제 변압기를 구성하는 부품들의 동적 탄성계수를 규명하였다. 변압기의 유한요소모델을 구현하고 변압기의 가진력을 도출하여 조화응답해석을 수행하였다. 그리고 조화응답해석 결과에서 변압기의 음향파워레벨(Sound power level)을 이론적으로 도출하였다. 마지막으로 소음저감 대책을 수립하고, 적용 전·후에 따른 실험과 해석의 소음 저감량을 비교하였다. 대책별 소음저감 비교분석을 통해 실험과 해석의 경향이 일치하는 것을 확인하였다.

키워드

조화응답해석

구조기인소음

소음저감 방법

소음 예측

References

D. J. Kweon, K. S. Koo, G. T. Kim, and J. W. Woo, "The audible noise prediction of the substation due to transformer audible noise and the field application of the low noise transformer" (in Korean), J. Electrical Eangineers. Soc. Kr. 59, 1382-1387 (2010).

K. S. Koo, J. W. Woo, J. S. Kwak, G. T. Kim, and D. J. Kweon, "An analysis on the audible sound due to load and cooling fan for 154kV power transformers" (in Korean), J. Electrical Eangineers. Soc. Kr. 59, 298-304 (2010).

K. W. Kim and Y. H. Kim, "The vibration characteristics for noise reduction of mold transformer," Proc. Trans. Korean Soc. Noise Vib. Eng. 49-53 (2008).

W. H. Choi and W. C. Kim, "Analysis of noise source for mold transformer" (in Korean), J. Power System Engineering. Soc. Kr. 4, 59-64 (2000).

J. W. Choi, C. J. Park, H. S. Go, Y. S. Park, and K. Y. Kweon, "Investigation of reinforcement plan for vibration Reduction of power transformer" (in Korean), Proc. Trans. Korean Soc. Noise Vib. Eng. 456-457 (2009).

C. S. Yu, U. Y. Jang, and J. H. Kim, "A case on the noise reduction of transformer in power plant" (in Korean), Proc. Trans. Korean Soc. Noise Vib. Eng. 324 (2020).

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10.5050/KSNVE.2010.20.2.191

Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 43
No :3
Pages :277-284
Received Date : 2024-02-16
Revised Date : 2024-04-15
Accepted Date : 2024-04-18
DOI :https://doi.org/10.7776/ASK.2024.43.3.277

The Journal of the Acoustical Society of Korea 한국음향학회지 ISSN:1225-4428(Print) 2287-3775(Online)

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