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Method for evaluating aging status of transformer insulating part

An aging state, transformer technology, used in instruments, measuring electrical variables, material defect testing, etc., can solve problems such as processes and methods without fixed promotion, and achieve the effects of low cost, reduced errors, and reduced workload

Active Publication Date: 2020-02-18
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are various methods in the industry to test the degree of polymerization of insulating paper and judge the aging state of insulating paper, but there is no fixed method and a set of effective and scalable processes and methods

Method used

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  • Method for evaluating aging status of transformer insulating part
  • Method for evaluating aging status of transformer insulating part
  • Method for evaluating aging status of transformer insulating part

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0033] Such as Figure 1 to Figure 2 As shown, the present invention is a method for evaluating the aging state of transformer insulation parts, and the method of the present invention includes the following steps:

[0034] S1. When selecting the insulating paper to be tested for the degree of polymerization in the transformer, in order to make the selected insulating paper effectively represent the aging state of the transformer insulation, the temperature rise hot spots of each part of the transformer under the rated current are counted, and each part is selected. Insulation paper with the highest temperature rise of windings and leads, including the highest temperature rise point of low-voltage winding and lead wires, the highest temperature rise point of medium voltage winding and lead wires, the highest temperature rise point of high volt...

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Abstract

The invention relates to a method for evaluating the aging status of a 500kV single-phase transformer insulating part based on measuring the polymerization degree of insulating paper. 500kV single-phase transformer insulating part aging status evaluation can be effectively performed. The method includes the four steps that first, the insulating paper to be subjected to a polymerization degree testin a transformer body is selected, and the test insulating paper should be able to effectively represent the aging status of the transformer insulating part; second, sampling and classification of test samples of the insulating paper are carried out; third, test process is carried out; and the fourth, test data are evaluated and analyzed. A set of effective and popularizable processes and methodscapable of carrying out the polymerization degree test of the insulating paper and judging the aging status of the insulating paper are provided for the industry.

Description

technical field [0001] The invention relates to the technical field of electrical equipment detection, in particular to a method for evaluating the aging state of transformer insulating parts. Background technique [0002] Transformer is one of the important equipment of power system, which plays an important role in connecting different voltage levels and controlling system voltage. Its internal body contains a large amount of insulating paper material for insulation and isolation between internal coils and between coils and ground. It is an important component to ensure the insulation performance of the transformer. Among them, the degree of polymerization of the insulating paper is used to judge the performance and Important parameter of aging state. At present, there are various methods for testing the degree of polymerization of insulating paper and judging the aging state of insulating paper in the industry, but there is no fixed method and a set of effective and scal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/20G01R31/12G01R31/00G01N25/20G01N25/72
CPCG01R31/20G01R31/1263G01R31/003G01N25/20G01N25/72
Inventor 李士杰徐朕陈吉丰韦清化陆海张新波李青
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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