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Composite insulator artificial aging test assessment method based on thermally stimulated current characteristics

A composite insulator, thermally stimulated current technology, applied in the field of voltage and insulation, can solve the problems of difficulty in forming quantitative standards, poor effectiveness and accuracy of artificial methods, and achieve the effect of improving efficiency

Inactive Publication Date: 2016-06-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

The thermal stimulation current method is used as the evaluation standard of artificial aging composite insulators, which solves the shortcomings of traditional methods (hydrophobicity, flashover voltage, etc.) The effectiveness evaluation method of artificial aging test for composite insulators needs further study

Method used

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  • Composite insulator artificial aging test assessment method based on thermally stimulated current characteristics
  • Composite insulator artificial aging test assessment method based on thermally stimulated current characteristics
  • Composite insulator artificial aging test assessment method based on thermally stimulated current characteristics

Examples

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Embodiment 1

[0022] 1. Artificial aging test of composite insulators

[0023] (1) 5000h comprehensive aging test

[0024] Sample A is a composite insulator short rod sample. This example uses the improved 5000h comprehensive aging test method of Tsinghua University (which has been added to DL / T810-2012) as the research basis to conduct artificial aging test on sample A.

[0025] (2) Corona aging test

[0026] The corona aging test is used as a comparative test of the 5000h comprehensive aging test. The current corona aging test method usually adopts different aging conditions. In this embodiment, a test voltage of 5kV, a temperature of 30°C, a humidity of 90%, and an aging time of 0 to 20 days were used for sample B and sample C respectively. Ageing. Sample B and sample C are silicone rubber sheets produced by different manufacturers, which are shed materials of composite insulators.

[0027] 2. Conduct thermal stimulation current test on composite insulator samples after artificial ag...

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Abstract

The invention relates to a composite insulator artificial aging test assessment method based on thermally stimulated current (TSC) characteristics. First peak temperature of a TSC curve of a composite insulator is confirmed to be 300 to 350K; then a correlation coefficient r of aging time and trapped electric charge quantity is calculated, and a maximum trapped electric charge increment [delta]Qmax=30nC is taken as a dividing value for distinguishing effectiveness of an artificial aging test; then a comparative analysis is made, if r<0.6, the effectiveness of the aging test method is poor; if r>=0.6, but the maximum trapped electric charge increment [delta]Qmax<30nC, the aging test method is feasible, but aging time is not enough, so an aging effect is not obvious; and if r>=0.6, and the maximum trapped electric charge increment [delta]Qmax>=30nC, the effectiveness of the aging test method is high. By implementation of the composite insulator artificial aging test assessment method based on TSC characteristics, the composite insulator artificial aging test can be well evaluated, thereby improving the efficiency of composite insulator aging research.

Description

technical field [0001] The invention belongs to the technical field of voltage and insulation, in particular to an artificial aging test evaluation method for composite insulators based on thermal stimulation current characteristics. Background technique [0002] The artificial aging test of composite insulators is a kind of field aging test for the purpose of studying the aging of composite insulators. The main reason for this type of test is that the operating conditions of composite insulators are complex and changeable, and the aging of composite insulators is greatly affected by environmental factors, so it is difficult to obtain samples with the same conditions during the research process; Therefore, the effect of one or several factors is often amplified in the test, so as to achieve the purpose of shortening the aging time. [0003] As a better artificial accelerated aging test method, it must have equivalence (or typicality, representative), repeatability (repeatab...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/003
Inventor 屠幼萍王璁王梦丹申瑞梁栋姜艺楠袁之康王景春
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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