Oil-immersed power transformer iron core vibration calculation method

A technology of power transformers and calculation methods, applied in the field of power transformers, can solve the problems of less impact research, lack of calculation methods for vibration acceleration of oil-immersed transformer cores, etc., and achieve the effect of solving vibration and noise

Active Publication Date: 2020-01-21
SHENYANG POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although the research on the vibration of power transformer iron core is becoming more and more mature, there are few studies on the influence of oil-immersed structure on the vibration of transformer iron core, especially the lack of calculation methods for the vibration acceleration of oil-immersed transformer iron core suitable for engineering

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  • Oil-immersed power transformer iron core vibration calculation method
  • Oil-immersed power transformer iron core vibration calculation method
  • Oil-immersed power transformer iron core vibration calculation method

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Embodiment Construction

[0028] As shown in the figure, the present invention comprises the following steps:

[0029] The first step is to establish a finite element model for the core of the oil-immersed power transformer using finite element software;

[0030] The second step is to calculate the vibration frequency of the transformer core, the calculation formula is

[0031] ω c = 2ω (1)

[0032] Among them, w c is the core vibration frequency, w is the transformer voltage frequency, which is consistent with the grid frequency;

[0033] In the third step, the damping coefficient used in the calculation of the vibration of the oil-immersed transformer core is obtained by calculating the transformer core density, transformer oil density and core vibration frequency. The calculation formula is:

[0034]

[0035] Among them, α is the damping coefficient, c is the propagation velocity, and w c is the vibration frequency of the iron core, ρ is the density of the iron core, according to the value o...

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Abstract

The invention belongs to the technical field of power transformers, and particularly relates to an oil-immersed power transformer iron core vibration calculation method. The oil-immersed power transformer iron core vibration calculation method comprises the following steps of: 1, establishing a finite element model for an oil-immersed power transformer iron core by adopting finite element software; 2, calculating the vibration frequency of the transformer core according to the calculation formula omega c = 2 omega (1), wherein wc is the vibration frequency of the core, and w is the voltage frequency of the transformer and is consistent with the frequency of a power grid; thirdly, obtaining the damping coefficient adopted for oil-immersed transformer iron core vibration calculation throughcalculation according to the transformer iron core density, the transformer oil density and the iron core vibration frequency, wherein the calculation formula is shown in the specification.

Description

technical field [0001] The invention belongs to the technical field of power transformers, in particular to a method for calculating vibration of an oil-immersed power transformer iron core. Background technique [0002] With the continuous improvement of the voltage level and capacity of the power grid, the structural size of the power transformer continues to increase, and the problem of vibration and noise of the transformer caused by this has become increasingly prominent. Especially in recent years, the expansion of cross-regional transmission grids and the continuous increase in the number of large power transformers in operation. With the increasing requirements for the quality of transformer products and the enhancement of users' awareness of environmental protection, the vibration and noise of transformers has become an important indicator for users to evaluate transformer products. Transformer vibration and noise, as one of the hot issues in industry and academia,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23
CPCY02E60/00
Inventor 张博颜宁
Owner SHENYANG POLYTECHNIC UNIV
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