Vibration transmission from internal structures to the tank of an oil-filled power transformer

Jin, Ming; Pan, Jie

doi:10.1016/j.apacoust.2016.05.022

Cited by 62 publications

(31 citation statements)

References 5 publications

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“…For the vibration and noise transmission process, the insulation oil reduces the low frequency response of the core structure, while the online vibration of the transformer tank is affected by the features of the transmission path from the internal structure to the tank [10], the identification result of the power transformers' nonlinear vibration system, which is corresponding to the features of the transmission path, could be used in estimating the vibration waveform in time domain [11]. Outside the oil tank, implementation of passive or active noise control is the main aim of research on noise transmission process in air.…”

Section: Introductionmentioning

confidence: 99%

Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions

Ying

Wang

et al. 2018

Energies

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Abstract: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.

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Section: Introductionmentioning

confidence: 99%

Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions

Ying

Wang

et al. 2018

Energies

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“…However, the vibrations generated by the main parts (winding and core) propagate to the measurement locations on the transformer tank via different paths. According to previous research, the cooling oil introduces an important vibration transmission path to the tank, and also provides damping and mass loading to the vibration in the tank [16]. These two effects work on the vibration transmission in two opposing ways.…”

Section: Spatial Distribution Of Transformer Tank Vibration Excited Bmentioning

confidence: 99%

“…It is unreliable to jump to the diagnosis conclusion only based on an individual measurement point [15]. Ming studied the vibration transmission properties, and measured the vibration transmission functions at different locations on the transformer tank, and found that vibration transmission functions vary with different locations [16]. The above mentioned works have investigated the vibration characteristics of different measuring points on the transformer tank, and emphasized the necessity of the multiple-point measurement and study of spatial information from vibration signals at different locations.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Power Transformer Vibration Distribution under Different Winding Defect Conditions

Zheng

Huang

2019

Electronics

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Vibration analysis is one of the important tools for the transformer winding faults diagnosis. Previous researchers have proved that the vibration spatial distribution of the winding is significantly influenced by the winding defects for the open circuit condition. In order to study the effects of the loading current on the winding vibrations under different mechanical conditions, experiments were designed and operated on a three-phase transformer winding to analyze the winding vibration distribution under different winding defect cases. Further, to study to what extent the mechanical defects and the loading current influence characteristics of the vibration distribution on the tank, the tank vibration distribution under various winding defects and different loading currents were also measured and discussed. In addition, the possibility of detection of transformer winding faults based on tank vibration spatial distribution characteristics was also discussed.

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“…In [16], [17], and [18], there was proven that measurements of tank vibrations could be used for detecting deformations and monitoring of operational load of transformer windings.…”

Section: Cameramentioning

confidence: 99%

Electromagnetic Compatibility and Radiation Analysis in Control Room

Kučera

Gutten

Šimko

et al. 2019

Measurement Science Review

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The article presents a theoretical analysis of electromagnetic compatibility (EMC) and experimental measurement of effects of radiation and acoustic emission of high-voltage transformers for electronic equipment and working personnel in a control room. Electromagnetic compatibility and safety of equipment are not considered as two distinct areas of study in electric and electronic safety. Economic criteria cannot compromise safety but at the same time immunity levels must be relevant in order to establish a “Functional Safety”. Introducing Special Immunity Levels in the level of equipment testing allows us to combine the two areas of EMC and safety. The measurement was carried out in high-current of very high-voltage distribution station. A real-life analysis of effects of electric and electromagnetic field was carried out. FFT was used for mathematical processing of data which were later presented in a graphical form of a spectrally analyzed area. In the last part of the paper we discuss the suitability of acoustic camera to perform contactless monitoring of the health and operation conditions of the power transformer by analyzing acoustic field generated by the transformer core and windings in near control room.

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Vibration transmission from internal structures to the tank of an oil-filled power transformer

Cited by 62 publications

References 5 publications

Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions

Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions

Experimental Research on Power Transformer Vibration Distribution under Different Winding Defect Conditions

Electromagnetic Compatibility and Radiation Analysis in Control Room

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