Urban 110 kV indoor substation noise analysis and control schemes: A real case study

Lv, Wang; Geng, Mingxin; Bai, Xue; Ma, Jiangang; Zhao, Yalin; Shen, Chen; Bin, Yang

doi:10.1016/j.apacoust.2021.108290

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…Substations bring convenience to residents, while they also generate significant noise. Because of the noise of transformers, reactors, and other equipment inside the substation, and with the characteristics of long-time emissions and significant low frequency, its impact on the lives of residents has been deepening [1][2].…”

Section: Introductionmentioning

confidence: 99%

Separation of Urban Substation Noise and Environmental Noise based on Independent Component Analysis

Qiu

Yang

et al. 2023

J. Phys.: Conf. Ser.

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With the development of urbanization, substations have started to be established in urban areas where the population is concentrated. To realize effective control of the substation noise, accurate measurements of the noise inside the substation and the surrounding area are necessary. However, in an urban area, the background noise, such as traffic noise, causes the sampled signals to contain not only the substation noise but also the background noise, which decreases the measurement accuracy. Thus, separating the substation noise from the environmental background noise is necessary. An independent component analysis method is used to realize the separation of the substation noise from complex environmental noises. In this paper, two typical environmental noises are selected, and their characteristics and the urban substation noise are analyzed. Then, a separation method based on the independent component analysis is constructed for separating substation noise. Its accuracy is evaluated using measured mixed signals. The verification shows that the separated substation noise is very close to the original substation noise signal, which shows that the method can be used in practical substation noise control engineering applications.

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Section: Introductionmentioning

confidence: 99%

Separation of Urban Substation Noise and Environmental Noise based on Independent Component Analysis

Qiu

Yang

et al. 2023

J. Phys.: Conf. Ser.

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“…[4] have effectively reduced the radiated sound power near the vibration absorption frequency by attaching a DVA to the surface of the elastic plate. Considering the difficulty of low-frequency noise control of power equipment and the limits of traditional noise reduction technologies, the author proposed the low-frequency noise control technology for transformer based on DVA [5], [6]. The reduction of sound radiation can be achieved by installing the DVA on the equipment surface.…”

Section: Introductionmentioning

confidence: 99%

Optimal analysis on low frequency line spectrum sound control of power equipment using dynamic vibration absorber

Ma¹,

Wu²,

Geng³

et al. 2022

Vib. proced.

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As generated by alternating current with the frequency of 50 Hz, the noise characteristics of power equipment reveal to be low frequency and line spectrum. The paper proposed a method to reduce the noise of the power equipment by installing dynamic vibration absorber (DVA) on the surface of it. The coupling between the attached DVA and the equipment may lead to undesirable frequency shift of the DVA itself, which will diminish the noise suppression effect of the whole system. The traditional passive DVA design method does not consider the effect of dynamic coupling. To solve this problem, global demodulation algorithm is applied to analyze the optimal parameters of DVA, which is integrated in the model of power equipment, to get the lowest single frequency radiated sound power level (SPL) of the equipment. The finite element model is established to verify the noise reduction optimal effect. The results show that the noise reduction effect of the optimized system is significantly improved compared with that using the classical parameter setting. The research can provide references for noise reduction optimization of power equipment in the future.

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A study on the control indices and emission limits of substation noise

Jiang

Chen

et al. 2023

Applied Acoustics

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Urban 110 kV indoor substation noise analysis and control schemes: A real case study

Cited by 7 publications

References 17 publications

Separation of Urban Substation Noise and Environmental Noise based on Independent Component Analysis

Separation of Urban Substation Noise and Environmental Noise based on Independent Component Analysis

Optimal analysis on low frequency line spectrum sound control of power equipment using dynamic vibration absorber

A study on the control indices and emission limits of substation noise

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