Identification of the nonlinear vibration system of power transformers

Zheng, Jing; Huang, Hai; Zhang, Yanni

doi:10.1088/1361-6501/28/1/015005

Cited by 12 publications

(6 citation statements)

References 18 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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“…The principle of photovoltaic power generation is to convert the sunlight energy irradiated on the photovoltaic panels into electric energy through a photoelectric reaction. Photovoltaic power generation is greatly affected by the weather and belongs to the continuous disturbance power supply that is not easy to regulate [3]. Solar power generation has both grid-connected and stand-alone modes.…”

Section: Solar Power Generationmentioning

confidence: 99%

Study on enhanced new energy source-load interaction response strategy based on multiple time scales

Zhang,

Ji,

Wang

et al. 2024

J. Phys.: Conf. Ser.

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Rapid socio-economic development has also brought about problems such as resource depletion and ecological and environmental pollution. Electricity is the most important form of energy supply for human beings, and its production and use are undergoing fundamental changes. This thesis conducts an in-depth study on the source-load interaction scheduling method in new energy power grids., which realizes a safe, economical, low-carbon and environmentally friendly intelligent scheduling mode through two-way interaction between the demand side and the grid. Firstly, the virtual power plant management mode of demand-side resources is studied to achieve new energy consumption through price-based demand response. Second, a safety-constrained unit model for source-load interaction is established. Then, the fuzzy opportunity scheduling model and solution method of the new energy power system under the source-load interaction scheduling mode are studied. Finally, the wide-area source-load interaction scheduling problem under the conservation of energy and reduction of emissions environment is studied, the conservation of energy and reduction scheduling model is proposed and a demand-side standby bidding and scheduling model under the future carbon emission trading is designed.

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“…h x x t is the impulse response function of the winding (from the winding force to the tank vibration via the index k path). w N is the number of the transmission paths of winding vibrations [19]. It can be seen that the structural changes of windings will cause variations of the inner transfer characteristics wk h .…”

Section: Vibration Transmission Pathsmentioning

confidence: 99%

“…In the equation above, F W (x w |t) is the electric distribution force at position x w of the winding, h wk (x T , x w t) is the impulse response function of the winding (from the winding force to the tank vibration via the index k path). N w is the number of the transmission paths of winding vibrations [19].…”

Section: Experimental Measurement Of Transformer Winding Vibration Spmentioning

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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Identification of the nonlinear vibration system of power transformers

Cited by 12 publications

References 18 publications

Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions

Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions

Study on enhanced new energy source-load interaction response strategy based on multiple time scales

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

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