基于全相FFT的电力变压器噪声衰减模型

doi:10.11930/j.issn.1004-9649.201801199

中国电力 ›› 2018, Vol. 51 ›› Issue (9): 93-100.DOI: 10.11930/j.issn.1004-9649.201801199

基于全相FFT的电力变压器噪声衰减模型

周亚琪¹, 应黎明², 胡克飞¹, 刘宪敏¹

1. 湖北省送变电工程公司, 湖北武汉 430063;
2. 武汉大学电气工程学院, 湖北武汉 430070

收稿日期:2018-01-15 修回日期:2018-05-21 出版日期:2018-09-05 发布日期:2018-09-20
作者简介:周亚琪(1990-),女,硕士研究生,从事变压器有源降噪研究,E-mail:zhouyaqi-kathy@163.com
基金资助:
国家自然科学基金资助项目（51377123）。

Attenuation Model of Transformer Noise Based on All-Phase FFT

ZHOU Yaqi¹, YING Liming², HU Kefei¹, LIU Xianmin¹

1. Hubei Province Electric Power Transmission & Transformation Engineering Company, Wuhan 430063, China;
2. School of Electrical Engineering, Wuhan University, Wuhan 430070, China

Received:2018-01-15 Revised:2018-05-21 Online:2018-09-05 Published:2018-09-20
Supported by:
This work is supported by the National Natural Science Fundation of China (No.51377123).

摘要/Abstract

摘要： 分析变压器噪声信号的频域特性和衰减模型，有利于变电站有源噪声控制技术的研究。对某变压器噪声信号进行全相FFT频谱分析，得到其频域特性曲线。由频谱图可以看出，该变压器噪声以100 Hz为基频，并在基频处噪声声压级达到峰值。首先利用全相FFT谱分析法处理各参考点噪声信号，得到倍频带声压级。再结合变电站各参数，建立声衰减模型，即可计算预测点声衰减量并合成其A声级，进而绘制出变电站噪声A声级及100 Hz声压级分布图。结合全相FFT的噪声衰减模型可以准确地计算出变电站的噪声分布，直观地评价变压器噪声对周边环境的影响。

关键词: 电力变压器, 有源降噪, 全相FFT谱分析, 衰减模型, 声场分布

Abstract: It is conducive to the studies on control technologies of the soured noise in a substation that analyzing the frequency domain properties and the attenuation model of a transformer's noise signal. In this paper, the noises collected from the transformer were analyzed using the full-phase FFT spectrum, and of which the frequency domain curve was obtained. As shown in the spectrogram, the fundamental frequency of the noises was 100 Hz and at this frequency the sound pressure level corresponding to every frequency point reached its maximum. In this study the full-phase FFT spectrum was utilized to obtain the octave band sound pressure levels and to analyze the noise signal of the reference point. Then the acoustic attenuation of the set point could be calculated and the attenuation model could be built by combining the parameters of the substation. The A sound pressure level and 100 Hz sound pressure distribution could be draw. The utilization of the noise attenuation model is beneficial to calculate the substation noise distribution more accurately, what's more, to evaluate their impacts on the surroundings more directly.

Key words: power transformer, active control of noise, all-phase FFT spectrum analysis, attenuation model, noise distribution

中图分类号:

TM41

周亚琪, 应黎明, 胡克飞, 刘宪敏. 基于全相FFT的电力变压器噪声衰减模型[J]. 中国电力, 2018, 51(9): 93-100.

ZHOU Yaqi, YING Liming, HU Kefei, LIU Xianmin. Attenuation Model of Transformer Noise Based on All-Phase FFT[J]. Electric Power, 2018, 51(9): 93-100.

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https://www.electricpower.com.cn/CN/Y2018/V51/I9/93

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基于全相FFT的电力变压器噪声衰减模型

Attenuation Model of Transformer Noise Based on All-Phase FFT

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基于全相FFT的电力变压器噪声衰减模型

Attenuation Model of Transformer Noise Based on All-Phase FFT

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