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Method for detecting ageing of composite insulator umbrella skirt

A technology of composite insulators and sheds, applied in the field of power equipment, can solve the problems of unobservable color changes, structural damage, and no decrease in hydrophobic performance

Active Publication Date: 2014-02-05
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] Due to the excellent hydrophobic recovery of composite insulators, in the early aging stage of composite insulators, no obvious color change and structural damage can be observed on the surface, and even its hydrophobic performance has not been found to decline. Aging behavior has already occurred, but other existing detection methods cannot characterize the aging behavior of composite insulator sheds well

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  • Method for detecting ageing of composite insulator umbrella skirt
  • Method for detecting ageing of composite insulator umbrella skirt
  • Method for detecting ageing of composite insulator umbrella skirt

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Embodiment Construction

[0026] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

[0027] From the perspective of materials science, the structure of a material determines its performance. The performance of composite insulator silicone rubber is closely related to its chemical composition, micro-aggregate structure, and surface interface state. The aging failure of...

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Abstract

The invention discloses a method for detecting the ageing of a composite insulator umbrella skirt. The method comprises the following steps: selecting a composite insulator high-pressure side umbrella skirt as a sample; performing slow positron beam measurement on the sample, so as to obtain a Doppler broadening spectrum distributed along with positron incident energy; collecting an S parameter of the Doppler broadening spectrum; judging whether the S parameter is in a preset parameter range or not; if so, judging that the composite insulator umbrella skirt is aged. The detection method disclosed by the invention is small in sampling amount, and simple and convenient in test method, and information of substances can be very sensitive to defect; the detection method can serve as a scanning probe of a silicon rubber surface structure and can be applied to preliminary identification and evaluation of the ageing of the composite insulator umbrella skirt.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a method for detecting the aging of sheds of composite insulators. Background technique [0002] Composite insulators have been widely used in most areas of our country. It has the advantages of light weight, high mechanical strength, strong hydrophobicity, good pollution flashover resistance, and zero value. At present, there are nearly 10 million composite insulators in China. Running on lines of different voltage levels, the usage ranks second in the world, and has become one of the main means of solving dirty insulation in our country. However, with the increase of the service life, the electrical aging of the silicone rubber shed material of the composite insulator has gradually become the focus of attention of the power system. [0003] Composite insulators will be comprehensively affected by electrical, mechanical and environmental factors during operation. With the incr...

Claims

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Application Information

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IPC IPC(8): G01N23/02
Inventor 徐晓刚许志海彭向阳王柯余欣毛先胤方鹏飞何春清王建国郑峰刘杨王康
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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