Composite insulator surface roughness evaluation method and system

The invention relates to the technical field of power equipment detection, and discloses a composite insulator surface roughness evaluation method and system, and the method comprises the steps: carrying out the sampling of a composite insulator sampling segment, obtaining N groups of sampling surfaces, carrying out the optical measurement of each sampling surface, and obtaining the point cloud data of the sampling surfaces; calculating the surface roughness coefficient of the sampling surface based on the point cloud data of the sampling surface; and comparing the surface roughness of the N groups of sampling surfaces to obtain a maximum surface roughness coefficient, and evaluating the surface roughness of the composite insulator by taking the maximum surface roughness coefficient as a three-dimensional roughness coefficient of the composite insulator. According to the method, the local three-dimensional roughness is measured, the flashover characteristic of the insulator is combined, and the maximum value