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Insulating paper aging state evaluation method and system under vibration-temperature synergistic effect

A technology of aging state and synergistic effect, applied in the direction of testing dielectric strength, design optimization/simulation, special data processing applications, etc., can solve the problems affecting the validity of the results, the evaluation results are not accurate enough, etc., and achieve the effect of rich insulation information

Inactive Publication Date: 2020-09-08
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

If the opinions of the expert group are highly dispersed, the validity of the results may be affected. Therefore, if the existing TOPSIS is directly applied to the evaluation of the aging state of the insulating paper in the converter transformer, the evaluation results will not be accurate enough

Method used

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  • Insulating paper aging state evaluation method and system under vibration-temperature synergistic effect
  • Insulating paper aging state evaluation method and system under vibration-temperature synergistic effect
  • Insulating paper aging state evaluation method and system under vibration-temperature synergistic effect

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Embodiment Construction

[0024] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0025] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0026] In the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combine...

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Abstract

The invention provides an insulating paper aging state evaluation method and system under vibration-temperature synergistic effect. The method comprises the steps: a polymerization degree of an insulation paper aging sample, content of furfural dissolved in oil and dielectric loss factors under different characteristic frequencies are fused to serve as characteristic parameters to form a target matrix; the target matrix is processed to obtain principal components and contribution degrees thereof so as to obtain a function relationship between the evaluation target and the comprehensive evaluation indexes, positive and negative ideal values of the evaluation target are determined according to the function relationship, and closeness and a corresponding evaluation result are obtained based on the positive and negative ideal values. On one hand, the method comprises multiple pieces of characteristic quantity information representing insulation paper degradation; on the other hand, the defect that TS sampling is difficult in engineering is effectively overcome.

Description

technical field [0001] The disclosure belongs to the technical field of state evaluation, and in particular relates to a method and system for evaluating the aging state of insulating paper under the synergistic effect of vibration and temperature. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Due to the existence of DC bias phenomenon, the vibration of the core and winding in the converter transformer is relatively severe. At this time, the corresponding relationship between the degree of polymerization (DP) of the insulating paper and its aging state cannot accurately evaluate the attenuation of the mechanical properties of the insulating paper. The validity of tensile strength (TS) is better, but the sampling and measurement of TS are relatively difficult. At the same time, the dissolved gas method in oil is susceptible to the influ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R27/26G06F30/20G06F119/04G06F119/08G06F111/10
CPCG01R27/2694G01R31/1263G01R31/1281G06F30/20G06F2111/10G06F2119/04G06F2119/08
Inventor 李长云于永进姜雅男
Owner SHANDONG UNIV OF SCI & TECH
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