Power transformer winding deformation reverse acquisition method based on topological optimization

A technology for transformer windings and power transformers, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve the problems of inconvenient transformer state detection and fault diagnosis, accurate and quantitative analysis of the position and degree of deformation, etc. The effect of improving restoration accuracy and improving efficiency

Active Publication Date: 2018-11-30
XI AN JIAOTONG UNIV
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Problems solved by technology

[0003] The existing transformer winding deformation detection methods can only make qualitative judgments, and cannot accurately and quantitatively analyze the position and degree of deformation, which brings inconvenience to transformer state detection and fault diagnosis

Method used

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  • Power transformer winding deformation reverse acquisition method based on topological optimization
  • Power transformer winding deformation reverse acquisition method based on topological optimization
  • Power transformer winding deformation reverse acquisition method based on topological optimization

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Embodiment Construction

[0067] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0068] Such as figure 1 As shown, a topology optimization-based reverse solution method for the deformation state of power transformer windings includes the following steps:

[0069] 1) Establish the equivalent circuit model of the transformer winding:

[0070] First, according to the structural form of the transformer winding, the equivalent circuit model of the winding with the wire cake as the basic unit is established, and the equivalent sub-circuit model with the turn as the unit is refined at the wire cake where the component parameter sensitivity is high;

[0071] Based on the theory of electromagnetic field analysis, using the three-dimensional time-harmonic field finite element method, and the frequency-varying characteristics of the dielectric constant of insulating materials, the capacitance values ​​of the equivalent circuit model...

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Abstract

A power transformer winding deformation reverse acquisition method based on topological optimization includes the steps of building an equivalent circuit model of a transformer winding and acquiring afrequency response function of the equivalent circuit model of the transformer winding, calculating flexibility of the frequency response function of the equivalent circuit model to element parameters, correcting parameter of a simulated equivalent circuit model according to the frequency response function obtained through test, and performing reverse acquisition on deformation status of the transformer winding by a topological optimization method based on a flexible deformation unit. High calculated amount generated in the process of directly utilizing electromagnetic field finite elements to calculate the frequency response function is avoided and correction efficiency is improved; besides, the topological optimization method is introduced to perform visual reduction on the deformed winding, and thus the winding deformation acquisition precision is improved.

Description

technical field [0001] The invention relates to the technical field of deformation detection of power transformer windings, in particular to a topology optimization-based reverse solution method for the deformation state of power transformer windings. Background technique [0002] The power transformer is the key equipment for energy conversion in the power transmission network. Ensuring the normal operation of the transformer is of great significance to the safe and reliable operation of the power system. However, in long-term operation, the transformer will inevitably suffer from impact or even damage, and winding deformation is one of the main forms of damage, so it is extremely important to accurately detect the state of winding deformation. [0003] The existing transformer winding deformation detection methods can only make qualitative judgments, but cannot accurately and quantitatively analyze the location and degree of deformation, which brings inconvenience to trans...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 李宝童洪军王亚楠黄从甲徐俊豪
Owner XI AN JIAOTONG UNIV
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