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A method for judging the hydrophobicity grade of silicone rubber insulators

A silicone rubber insulation and determination method technology, which is applied in the field of level determination, can solve the problems of silicone rubber insulators such as the decline of hydrophobicity and migration characteristics, the low pollution flashover resistance, and the threat to power system safety and stable operation.

Active Publication Date: 2018-10-09
STATE GRID CORP OF CHINA +1
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Problems solved by technology

The decline in hydrophobicity and hydrophobic migration characteristics of silicone rubber insulators is specifically manifested in the lower pollution flashover resistance, which poses a threat to the safety and stable operation of the power system

Method used

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  • A method for judging the hydrophobicity grade of silicone rubber insulators
  • A method for judging the hydrophobicity grade of silicone rubber insulators
  • A method for judging the hydrophobicity grade of silicone rubber insulators

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Embodiment Construction

[0032] The method for judging the hydrophobicity level of silicone rubber insulators of the present invention, the flow chart is as follows figure 1 , specifically including the following specific implementation steps:

[0033] 1. Obtain the original color image of the silicone rubber insulator with water droplets through the video camera on the high-voltage tower, and send the image back to the computer equipped with image processing function, and perform grayscale processing on the returned color image, such as figure 2 shown.

[0034] 2. Perform Haar wavelet denoising and reconstruction on the grayscale image:

[0035] In the decomposition and filtering process of hydrophobic images, the high-frequency coefficients are mainly processed, and the noise can be compensated to a certain extent under the condition of uneven illumination; by selecting the appropriate wavelet function, the signal in the image can be decomposed and analyzed. Reconstruction; in an example of the p...

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Abstract

The invention relates to a hydrophobicity grade judging method of a silicone rubber insulator. The hydrophobicity grade judging method comprises the following steps: acquiring an insulator image with water drops; carrying out noise filtering on the acquired image; dividing the image by applying a maximum between-cluster variance method to form a binaryzation image needed by a subsequent hydrophobicity judging research; extracting parameters including shape factors, fractal dimensions and the like from the binaryzation image to carry out hydrophobicity grading; and finally, grading the hydrophobicity of the composite insulator into three types including HC1-HC3, HC4-HC5 and HC6-HC7 by adopting a hydrophobicity grade grading method of a support vector machine, and finely dividing the hydrophobicity grade into seven grades from three types based on a multi-fractal grading method. According to the technical method provided by the invention, the hydrophobicity grades of the insulator can be relatively accurately distinguished, and relatively good evidences are provided for the pollution grades of the insulator.

Description

technical field [0001] The invention relates to a method for judging the hydrophobicity grade of a silicone rubber insulator, in particular to the judgment of the hydrophobicity grade of a silicone rubber insulator by using an image processing recognition technology. Background technique [0002] Insulators in operation are affected by factors such as corona, flashover, and pollution for a long time. Especially under humid conditions, the external insulation strength of porcelain and glass insulators will decrease sharply, which will cause large-scale pollution flashover accidents in the power grid, and cause serious damage to the national economy. huge loss. Practice has shown that the use of silicon rubber insulators instead of traditional insulators (porcelain or glass insulators) can effectively curb the occurrence of pollution flashover accidents. The reason why silicone rubber insulators are widely used in anti-pollution transformation of power grids is because of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00
Inventor 肖运军周健朋罗勇杨凌云张立邱超王密肖云杨涛张长洪黄俊王璿锦蒲伟彭志明邹应虎丁文晖
Owner STATE GRID CORP OF CHINA
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