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Transformer electromagnetic vibration noise calculating method based on finite element method

A finite element method and electromagnetic vibration technology, applied in calculation, instrumentation, electrical digital data processing, etc., can solve the problems of inaccurate models, difficult measurement, errors, etc., and achieve the effect of convenient data transmission and accurate and reliable calculation results

Inactive Publication Date: 2015-11-25
WUHAN UNIV
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Problems solved by technology

However, due to measurement difficulties and errors, this model is not very accurate

Method used

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  • Transformer electromagnetic vibration noise calculating method based on finite element method
  • Transformer electromagnetic vibration noise calculating method based on finite element method
  • Transformer electromagnetic vibration noise calculating method based on finite element method

Examples

Experimental program
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Effect test

Embodiment

[0053] Taking a 110kV oil-immersed three-phase double-winding transformer as an example, the distribution of noise in the 100Hz and 200Hz frequency bands of the transformer on two different sides is calculated, and compared with the measured data.

[0054] In step 1, the rated current of the high-voltage winding is 165.3A, the rated current of the low-voltage winding is 1818.7A, the number of turns per phase of the high-voltage winding is 737 turns, the number of turns of each phase of the low-voltage winding is 116 turns, and the coil diameter of the high-voltage winding is 948mm to 1111mm. The diameter of the winding coil is 598mm-710mm, the height of the winding coil is 1216mm, the diameter of the iron core is 565mm, the height of the iron core yoke is 540mm, and the volume of the oil tank is 5m*2m*3m. Based on the above structural parameters, a three-dimensional geometric model of the transformer is established.

[0055] In step 2, set the stacking coefficient to 0.95, set ...

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Abstract

The invention discloses a transformer electromagnetic vibration noise calculating method based on the finite element method. The transformer electromagnetic vibration noise calculating method comprises the steps of 1, establishing a structured grid model and an acoustics grid model according to a three-dimensional geometrical model of a transformer; 2, conducting transient electromagnetic simulation on the structured grid model to obtain transient electromagnetic force waves borne by each phase winding and an iron core; 3, conducting FFT on the transient electromagnetic force waves borne by each phase winding and the iron core to obtain the frequency domain distribution of electromagnetic force borne by each phase winding and the iron core; 4, conducting harmonic response analysis on the structured grid model to obtain the vibration displacement data of nodes on the surfaces of the windings and the iron core; 5, conducting sound field calculation on the acoustics grid model to obtain the radiation noise distribution of the transformer. According to the transformer electromagnetic vibration noise calculating method, all noise influence factors are considered, and calculation results are accurate and reliable. The transformer electromagnetic vibration noise calculating method can be used for winding short circuit vibration deformation analysis and the like and can also provide method and basis for motor noise analysis.

Description

technical field [0001] The invention belongs to the technical field of transformer electromagnetic vibration noise analysis and control, and in particular relates to a method for calculating transformer electromagnetic vibration noise based on a finite element method. Background technique [0002] Substation noise mainly comes from transformers and other equipment, which not only affects the lives of surrounding residents, but also affects the operating life of transformers. Substation noise is an important environmental and health problem. Excessive transformer noise may lead to loose iron core, winding deformation, and increased temperature rise. These conditions will pose a huge threat to the ability of power transformers to withstand short-circuit current impacts, and may cause further reduction in insulation strength, seriously affecting the normal operation of the transformer, and even It may cause damage to the transformer and affect the normal operation of the AC pow...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 胡静竹刘涤尘廖清芬晏阳梁姗姗韩翔宇
Owner WUHAN UNIV
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