Surface microtopography analysis method after insulation material flashover based on fractal theory

Abstract

The invention discloses a fractal theory-based method for analyzing the surface microscopic topography of an insulating material after flashover, comprising the following steps: Step 1: performing a flashover discharge experiment on the insulating material, and obtaining an AFM surface topography diagram of the insulating material; Step 2: converting the AFM surface topography image of the insulating material into a grayscale image; the size of the grayscale image is m×m; Step 3: processing the grayscale image with a fractal method or a multifractal method , to obtain fractal parameters; step 4: quantitatively analyze the surface micro-morphology of the insulating material after flashover according to the fractal parameters. The invention combines the grayscale method, fractal theory and AFM microscopic observation means to analyze the surface morphology of the insulating material after flashover, the advantages of the three are fully utilized, and the analysis results are more effective and reliable.

Description

technical field [0001] The invention relates to a method for analyzing the surface microscopic appearance of insulating materials after flashover, in particular to a method for analyzing the surface microscopic appearance of insulating materials after flashover based on fractal theory, which belongs to the technical field of insulating material surface detection. Background technique [0002] Insulating materials have good dielectric and mechanical properties, but due to factors such as environment and partial discharge, insulation aging will occur, resulting in a decline in material performance, which will lead to electrical equipment prone to failure and shortened life. Among them, flashover inevitably causes changes in the physical morphology of the surface of insulating materials, and even causes the decomposition of surface material components. These changes and damage may lead to insulation failure of the material. Therefore, the research on the surface morphology chan...

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Problems solved by technology

[0003] However, the current research on the surface morphology of insulating materials is mostly limited to the characterization of roughness and the qualitative description of morphology features, which is greatly affected by subjectivity.

In addition, the phenomenon of flashover discharge is highly random. The existing conventional evaluation parameters include geometric evaluation paramete

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