Oil-immersed paper sleeve main insulation non-uniform aging state evaluation method based on correction X model

A technology of aging state and insulation state, applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve the problem of not considering uneven diffusion, etc., and achieve the effect of reliable operation

Active Publication Date: 2020-02-14
广西博电科技有限公司
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Problems solved by technology

However, the traditional X model does not consider the non-uniform diffusion of the internal temperature field during the actual operation of the oil-immersed paper casing

Method used

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  • Oil-immersed paper sleeve main insulation non-uniform aging state evaluation method based on correction X model
  • Oil-immersed paper sleeve main insulation non-uniform aging state evaluation method based on correction X model
  • Oil-immersed paper sleeve main insulation non-uniform aging state evaluation method based on correction X model

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Embodiment Construction

[0040] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0041] In this embodiment, the method for evaluating the uneven aging state of the main insulation of oil-impregnated paper bushings based on the modified X model includes the following steps:

[0042] (1) For the oil-paper insulation system of the main insulation of the oil-impregnated paper bushing under the uniform aging state, the structure and mathematical expression of the traditional X model are obtained by deriving the structure of the traditional X model. figure 1It is the derivation process of the equivalent structure of the main insulation of the oil-impregnated paper bushing. The traditional X-model structure derivation method is to s...

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Abstract

The invention discloses an oil-immersed paper sleeve main insulation non-uniform aging state evaluation method based on a correction X model. The method comprises the following steps of: (1) obtaininga structure and a mathematical expression of a conventional X model through a conventional X model structure derivation mode; (2) obtaining a temperature field on the main insulation of the oil-immersed paper sleeve; (3) obtaining the aging state of an insulation paper layer on the main insulation in the diffusion temperature field; (4) constructing the equivalent structure of the correction X model; (5) calculating the mathematical expression of the correction X model containing two insulation states, three insulation states and four insulation states; (6) obtaining the general expression ofthe correction X model containing a plurality of aging states; (7) obtaining FDS data; and (8) establishing the FDS database of the non-uniform aging state of the main insulation of the oil-immersedpaper sleeve. According to the invention, the uneven diffusion phenomenon of the internal temperature field in the actual operation process of the oil-immersed paper sleeve is considered, the diagnosis is more convenient and accurate, and the operation of a power system is more reliable, safer and more stable.

Description

technical field [0001] The invention relates to the technical field of electrical equipment fault diagnosis, and more specifically, to a method for evaluating the non-uniform aging state of the main insulation of an oil-immersed paper bushing based on a modified X model. Background technique [0002] High-voltage bushings are an important part of electrical equipment such as power transformers and circuit breakers. At present, the most widely used high-voltage bushing in the power grid adopts oil-paper composite insulation structure, that is, oil-impregnated paper bushing. When the high-voltage bushing fails, it will have an important impact on the transformer and the connected electrical network. When the oil-impregnated paper bushing is in normal operation, its main insulation will be affected by the synergistic effects of various stresses such as thermal field, oxygen, moisture, electric field, organic acid and mechanical vibration. The main insulating oil-paper insulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1263
Inventor 刘捷丰郑含博张镱议
Owner 广西博电科技有限公司
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