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Method for evaluating aging life of insulating oil paper in oil-immersed transformer

An oil-immersed transformer and internal insulation technology, applied in design optimization/simulation, CAD numerical modeling, etc., to achieve accurate life assessment, optimized experimental conditions, and compact structure

Active Publication Date: 2020-03-17
JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD +3
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Problems solved by technology

[0007] Invention patent CN201810729552.4-A high-voltage current transformer internal oil-paper insulation life evaluation algorithm Although the frequency-temperature translation theory is used, it is only used to calculate the activation energy of oil-immersed cardboard with different moisture content. This invention patent is mainly for different moisture content. Oil-impregnated paperboard is not calculated for the oil-paper insulation model, and there is no report on the life evaluation of the oil-paper insulation inside the oil-immersed transformer under different oil change intervals. Therefore, a new technical solution is urgently needed in the existing technology to solve this problem. question

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  • Method for evaluating aging life of insulating oil paper in oil-immersed transformer
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  • Method for evaluating aging life of insulating oil paper in oil-immersed transformer

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Embodiment Construction

[0040] The specific embodiments of the present invention will be described in detail below with reference to the drawings.

[0041] By the attachment Figure 1~4 Shown: An oil-immersed transformer internal insulating oil paper aging life assessment method, including the following steps, and the following steps are carried out in sequence,

[0042] Step 1: Establish a plurality of insulation model samples, the insulation model is an insulation model that can simulate the oil change cycle of an oil-immersed transformer;

[0043] Step 2: Perform dielectric loss tests with different oil change periods on the insulation model samples to obtain low-frequency translation factor α suitable for different oil change periods; perform accelerated thermal aging tests on the insulation model samples with different oil change periods at a set temperature , Obtain the characterization parameter k of cellulose degradation rate DP And polymerization degree, the characterization parameter w* DP , The ...

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Abstract

The invention discloses a method for evaluating the aging life of insulating oil paper in an oil-immersed transformer. The invention belongs to the field of oilpaper insulation life evaluation. The invention provides an oiled paper insulation model. The method includes carrying out the translation calculation on a low-frequency band representing aging of the insulating paper board in the oiled paper insulating model; excluding interference factors, and obtaining the parameters w * DP and kDP having a quantitative relation with an oil change period; according to the invention, quantitative analysis can be carried out on the oil-paper insulation service life in the oil-immersed transformer in different oil change periods, and the method is used for solving the problem that the service life evaluation does not accord with the actual working condition due to the fact that only the oil-immersed paperboard is analyzed and the influence of the factors of the oil change periods on the aging service life is not considered in the prior art.

Description

Technical field [0001] The invention belongs to the field of oil-paper insulation life evaluation, and particularly relates to an oil-immersed transformer internal insulation oil paper aging life evaluation method. Background technique [0002] Oil-immersed power transformers are an important link in the operation of power grids. However, due to the influence of the complex operating environment (moisture content, aging temperature, etc.) throughout the year, the oil-paper insulation inside the oil-immersed power transformers will undergo severe aging, and their insulation performance will be greatly improved. Reduction seriously affects the stability of the power grid. Therefore, the service life of oil-immersed power transformers depends on the aging degree of the internal oil-paper insulation. It is of great significance to study the evaluation algorithm of the internal insulation aging life of high-voltage oil-immersed transformers. [0003] For oil-paper-insulated equipment, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F111/10
Inventor 赵春明何秋月张明泽刘骥杨代勇张雷于群英刘赫杨明王凯孙友群王朔许文燮
Owner JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD
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