Research on Sound-Absorption Materials for Substation Noise Reduction

doi:10.11930/j.issn.1004-9649.2014.4.144.3

Abstract

Abstract: With the strictness of laws and regulations and the enhancement of residents’ environmental protection awareness, the problem of excessive substation noise has become the focus of substation complaint issues. This paper presents a study on the characteristics of substation noise and the property of the noise absorption materials. It is found that presently used sound-absorbing materials cannot meet the demand of the noise reduction and the service condition of substation. Therefore, microporous fiber composite acoustic board which is a new type of sound-absorbing material has been creatively developed. The board has two layers. The outer layer is the microporous acoustic board, while the inner layer is the aluminum fiber acoustic board .There are cavities behind the two layers,which can combine into a double-resonance structure to greatly broaden the absorption broadband of material and improve the low frequency absorption coefficient. In addition, the material of acoustic board is aluminum, which makes the structure have better properties of heat conduction, weather resistance, recoverability and economy. Applications of the microporous fiber composite acoustic board in a 110 kV indoor substation of one southern city have been conducted, the whole noise level of the substation has been reduced significantly. The microporous fiber composite acoustic board will be the ideal absorption material in substation noise control.

Key words: substation, sound-absorption material, low-frequency noise, noise reduction, microporous fiber composite acoustic board

CLC Number:

TM63

FAN Chao, NIE Jing-kai, XIAO Wei-min, CHEN Xin, HAN Yu, GENG Hui-jun. Research on Sound-Absorption Materials for Substation Noise Reduction[J]. Electric Power, 2014, 47(4): 144-147.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.4.144.3

https://www.electricpower.com.cn/EN/Y2014/V47/I4/144

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