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Minimizing the audible noise impact of a power system is one of the major measures for a cleaner power supply. In this study, a smart silencing unit was designed based on the universal design principles to mitigate the noise pollution of a substation. The corresponding large noise reduction coefficient (NRC), smart selective absorption characteristics at certain frequency bands, and a beneficial low-frequency sound absorption effect were verified through impedance tube and reverberation room tests. A comparison of the analysis results showed that after the installation of the smart silencing units, the average steady state maximal sound pressure level (SPL) acting on the surrounding community building surfaces decreased by 10.77 dB. Thus the substation audible noise impact of the substation on the ambient environment was properly limited. This innovative solution bridges the gaps between the acoustic absorption and insulation theory research field and the implementation of noise suppressing measures for an acoustic environment friendly substation. Consequently, a cleaner power supply and soundscape compatibility between the substation and surrounding communities can be achieved more readily.
Donghui Wang; Liming Ying; Yongtian Jia; Lu Zhang; Fan Zhang; Wenyi Wang. Noise pollution mitigation method for substations in urban communities based on a smart silencing unit. Journal of Cleaner Production 2019, 245, 118911 .
AMA StyleDonghui Wang, Liming Ying, Yongtian Jia, Lu Zhang, Fan Zhang, Wenyi Wang. Noise pollution mitigation method for substations in urban communities based on a smart silencing unit. Journal of Cleaner Production. 2019; 245 ():118911.
Chicago/Turabian StyleDonghui Wang; Liming Ying; Yongtian Jia; Lu Zhang; Fan Zhang; Wenyi Wang. 2019. "Noise pollution mitigation method for substations in urban communities based on a smart silencing unit." Journal of Cleaner Production 245, no. : 118911.
Active noise control (ANC) technology can be able to reduce the low frequency noise effectively, and has been widely applied in limited enclosed equipment, such as cars, aircraft cockpits, and headphones, etc. Compared with the traditional noise reduction methods, ANC technology is a cost-effective method in handling the low-frequency noise of transformers. An experimental ANC system in a virtual substation is designed and constructed. An adaptive signal tracking ANC algorithm is proposed, and a set of ANC experimental prototypes applied to a virtual substation is designed. Based on the proposed algorithm, the distributions of the acoustics and spectral characteristics of transformer noise in substations are analyzed. Experimental results show that the effective noise reduction can be achieved an average of 5 dB(A) in a given region with respect to the absence of the ANC system.
Liming Ying; Jinwei Wang; Qin Liu; Donghui Wang. Application Study of Adaptive Tracking Algorithm in Active Noise Control System of Transformer. Applied Sciences 2019, 9, 2693 .
AMA StyleLiming Ying, Jinwei Wang, Qin Liu, Donghui Wang. Application Study of Adaptive Tracking Algorithm in Active Noise Control System of Transformer. Applied Sciences. 2019; 9 (13):2693.
Chicago/Turabian StyleLiming Ying; Jinwei Wang; Qin Liu; Donghui Wang. 2019. "Application Study of Adaptive Tracking Algorithm in Active Noise Control System of Transformer." Applied Sciences 9, no. 13: 2693.
Power transformers in substations are common sources of noise in residential areas of neighbourhoods. A quantified and visualized analysis of the power transformer acoustic characteristics is a prerequisite for the suppression of audible noise from the corresponding substation. In this study, based on a combined finite and boundary element method, a full-sized 3D power transformer multiphysics coupling model, which is aimed at realizing high accuracy and improving the computational efficiency, was developed. After validation of the numerical method using comparative tests, profile analyses in the near-field and far-field in the extended planes and three-dimensional areas of a power transformer were conducted to characterize the external acoustic field. The calculation results included the distribution of the spatial sound pressure levels of the power transformer at multiple levels in the frequency domain. These spatial sound pressure levels can be used to guide the efficient measurement of the external acoustic field of a power transformer and the soundscape planning around a substation, and the differentiated design of the sound absorption structure inside a substation.
Liming Ying; Donghui Wang; Guodong Wang; Wenyi Wang. Acoustic characteristic analysis of power transformers in urban communities based on a combined finite and boundary element method. Indoor and Built Environment 2019, 29, 208 -220.
AMA StyleLiming Ying, Donghui Wang, Guodong Wang, Wenyi Wang. Acoustic characteristic analysis of power transformers in urban communities based on a combined finite and boundary element method. Indoor and Built Environment. 2019; 29 (2):208-220.
Chicago/Turabian StyleLiming Ying; Donghui Wang; Guodong Wang; Wenyi Wang. 2019. "Acoustic characteristic analysis of power transformers in urban communities based on a combined finite and boundary element method." Indoor and Built Environment 29, no. 2: 208-220.
To decrease the influence of indoor substation noise originating from power transformers in the surrounding soundscape, an improved indoor substation low-noise design procedure was proposed and demonstrated in this study. According to the new design procedure, acoustic radiation characteristics analyses were conducted to quantify and visualize the external sound field of a power transformer. The interdepartmental and intradepartmental feedback was then summarized from the indoor substation noise radiation level measurements. Finally, these acoustic radiation characteristics analysis results and feedback were applied to the low-noise indoor substation redesign in both the integrated layout modifications and sound absorbing structure improvements to decrease the sound pressure levels at the noise sensitive area boundaries. The comparative analysis results verified that, on the premise of land cost neutrality, the modified layout and sound absorbing structure could limit the substation noise impact on the surrounding soundscape, and the mean value of the maximum sound pressure levels at the noise sensitive area boundaries were 6.6 dBA smaller than before.
Donghui Wang; Liming Ying; Wenyi Wang; Chunming Pei; Jinwei Wang. Indoor substation low-noise design and sound absorbing structure improvement considering power transformer acoustic radiation characteristics. Building and Environment 2018, 149, 390 -403.
AMA StyleDonghui Wang, Liming Ying, Wenyi Wang, Chunming Pei, Jinwei Wang. Indoor substation low-noise design and sound absorbing structure improvement considering power transformer acoustic radiation characteristics. Building and Environment. 2018; 149 ():390-403.
Chicago/Turabian StyleDonghui Wang; Liming Ying; Wenyi Wang; Chunming Pei; Jinwei Wang. 2018. "Indoor substation low-noise design and sound absorbing structure improvement considering power transformer acoustic radiation characteristics." Building and Environment 149, no. : 390-403.
Spatial acoustic radiation characteristics analysis is the precondition of reducing the noise influence of outdoor power transformer while multi-physical field coupling method can be applied to quantify and reveal these acoustic characteristics of a running power transformer. In this study, based on the theoretical analysis about noise generation and dissemination process, an acoustic radiation model about oil-immersed power transformer was established and verified with field test data in time and frequency domain. Then, far-field analysis and directivity analysis were accomplished to characterize acoustic field of power transformer under multiple operating conditions. Finally, the acoustic radiation influence on potential surrounding buildings were analyzed and discussed. The visual results and conclusion provide acoustic guide for the optimal planning and design about both power substation and ambient buildings.
Liming Ying; Donghui Wang; Jinwei Wang; Guodong Wang; Xiaowen Wu; Jiangtao Liu. Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions. Energies 2018, 11, 74 .
AMA StyleLiming Ying, Donghui Wang, Jinwei Wang, Guodong Wang, Xiaowen Wu, Jiangtao Liu. Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions. Energies. 2018; 11 (1):74.
Chicago/Turabian StyleLiming Ying; Donghui Wang; Jinwei Wang; Guodong Wang; Xiaowen Wu; Jiangtao Liu. 2018. "Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions." Energies 11, no. 1: 74.