Method for judging aging of insulator room temperature vulcanization (RTV) coatings

A technology for insulators and coatings is applied in the field of judging the aging of insulator RTV coatings, and can solve the problem of low accuracy of judgment methods.

Inactive Publication Date: 2012-09-19
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0006] The present invention aims to provide a method for judging the aging of an insulator RTV coating to solve the problem that the accuracy of the method for judging the aging of an insulator RTV coating in the prior art is not high

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  • Method for judging aging of insulator room temperature vulcanization (RTV) coatings
  • Method for judging aging of insulator room temperature vulcanization (RTV) coatings

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[0021] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0022] The pulsed electro-acoustic (PEA) space charge test principle is based on the Coulomb force law, that is, when there is a resident charge, the applied pulse field will induce a disturbed force density on the tested material. The disturbance excites the charged body to generate an acoustic wave, which is detected by a piezoelectric transducer mounted on an electrode. The space charge distribution information is contained in the acoustic signal, which can be separated and corrected by digital signal processing. The PEA method is simple and practical, and can accurately measure the space charge distribution characteristics of materials such as dielectrics, insulating materials, semiconduct...

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Abstract

The invention provides a method for judging aging of insulator room temperature vulcanization (RTV) coatings. The method includes: taking samples of the insulator RTV coatings to obtain a test piece; performing space charge test on the test piece in a pulsed electro-acoustic (PEA) method to obtain a space charge density distribution curve of the test piece; calculating the total space charge amount of the test piece according to the space charge density distribution curve of the test piece; and judging the aging degree of the RTV coatings according to the total space charge amount of the test piece. By adopting the technical scheme, evaluation of the aging state of the insulator RTV coatings is carried out in view of micro electric characteristics, and the aging degree is quantized with the total space charge amount as the characteristic quantity, so that the method provides data basis for evaluation of antipollution performance of insulators of a power system, provides basis for further making time and schemes of insulation re-coated RTV materials, and solves the problem that the method in the prior art for judging aging of insulator RTV coatings is not high in accuracy.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a method for judging the aging of an insulator RTV coating. Background technique [0002] Room Temperature Vulcanized (RTV) silicone rubber (Room Temperature Vulcanized, RTV) has excellent anti-fouling flashover performance and many characteristics due to its good hydrophobicity and hydrophobicity migration, and has become a solution for power systems to solve the pollution flashover problem of outdoor porcelain insulation equipment. The application in traditional porcelain insulators is to process a certain thickness of room temperature vulcanized silicone rubber coating on the surface of the porcelain insulator, and use the hydrophobicity of the room temperature vulcanized silicone rubber coating to improve the overall anti-pollution flashover performance of the insulator. However, the RTV coating is eroded by weather conditions outdoors and affected by a strong electromagneti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/60
Inventor 屠幼萍王景春丁立健陈静静张辉陈聪慧王璁
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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