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Experimental method for insulation wetting and aging evaluation research of winding models

A technology of aging assessment and experimental method, applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve the problem of inability to distinguish the degree of moisture and aging of transformer windings

Active Publication Date: 2019-01-01
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the current frequency-domain dielectric spectrum test results can only comprehensively evaluate the insulation state of transformer windings, and cannot distinguish the degree of moisture and aging of transformer windings.

Method used

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  • Experimental method for insulation wetting and aging evaluation research of winding models
  • Experimental method for insulation wetting and aging evaluation research of winding models
  • Experimental method for insulation wetting and aging evaluation research of winding models

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Experimental program
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Embodiment Construction

[0024] The present invention will be further described below in conjunction with accompanying drawing:

[0025] figure 1 Shown is a schematic diagram of an experimental platform for a winding model insulation damping and aging evaluation study. From figure 1 It can be seen that an experimental method for the study of insulation damping and aging evaluation of winding models mainly includes the following steps:

[0026] The first step: build the experimental platform

[0027] The experimental platform for the research on damp and aging evaluation of winding model insulation, including transformer high-voltage winding (3), transformer low-voltage winding (4), heating wire (7), experiment box (1), temperature control system (9), humidity control system ( 13), dielectric spectrum tester (8), terminal machine (14), the liquid level of insulating oil (2) in the experiment box (1) is higher than the transformer high-voltage winding (3) and transformer low-voltage winding (4), and ...

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Abstract

The invention discloses an experimental method for insulation wetting and aging evaluation research of winding models. Firstly, an experimental platform is set up; secondly, winding models with different wetting and aging degrees are prepared; thirdly, a frequency-domain dielectric spectrum curve database of the different wetting and aging degrees of the winding models at reference temperature isobtained; fourthly, frequency-domain dielectric spectrum test and reduction is carried out on a winding model within unknown wetting and aging degree; fifthly, the similarity between the frequency-domain dielectric spectrum test result and the frequency-domain dielectric spectrum curves in the database is calculated; and finally, the wetting degree and aging degree of the unknown winding model areobtained. According to the experimental method, a frequency-domain dielectric spectrum curve database of the different wetting and aging degrees of the winding models is established to evaluate the wetting degree and aging degree of windings, and a reference can be provided for the evaluation research of the wetting degree and aging degree of transformer windings.

Description

technical field [0001] The invention belongs to the field of transformer winding insulation state evaluation research, and in particular relates to an experimental method for the research of winding model insulation damp and aging evaluation research. Background technique [0002] The transformer is the core equipment in the power system, and its insulation performance affects the safety and stability of the power system operation. During the operation of the transformer, the transformer winding is affected by moisture, temperature, strong magnetic field and electric field for a long time, resulting in constant changes in its insulation state, which brings hidden dangers to the safe and stable operation of the power system. Accurate condition monitoring of moisture content and aging degree. [0003] At present, the detection methods for the degree of moisture and aging in transformer windings mainly include insulation resistance, dielectric loss factor, partial discharge an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R27/26G01R31/12
CPCG01R27/2617G01R31/00G01R31/1263
Inventor 周利军李会泽王安陈雪骄廖维
Owner SOUTHWEST JIAOTONG UNIV
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