Porcelain insulator insulation state evaluation method based on solar-blind ultraviolet imaging image feature

Abstract

The invention relates to a porcelain insulator insulation state evaluation method based on solar-blind ultraviolet imaging image features. The porcelain insulator insulation state evaluation method comprises the steps of: acquiring a facula area sequence through calculating facula areas of continuous image frames in an UV video; extracting three quantization parameters including a facula area average value, a facula area mean square error and a large facula area frequentness of the facula area sequence by adopting an statistical analysis method; acquiring cluster centers in four insulating states such as good, poor, bad and very bad by adopting a fuzzy clustering algorithm; and then partitioning the insulation state of an insulator to be distinguished based on a minimum-distance criterion. According to the porcelain insulator insulation state evaluation method, the three feature parameters of the facula area sequence are regarded as feature quantities, the cluster centers in four insulating states can be obtained by adopting the FCM algorithm, the insulation state of an unknown sample is judged according to the Euclidean distance from the unknown sample to each cluster center, the quantization problem of ultraviolet imaging detection results is effectively solved, and a reliable basis can be provided for the maintenance or replacement of polluted insulators.

Description

technical field [0001] The invention relates to a method for evaluating the insulation state of porcelain insulators based on statistical characteristic parameters of solar-blind ultraviolet imaging light spot area and cluster analysis, belonging to the technical field of electric power. Background technique [0002] Insulators are one of the most widely used electrical components in power systems, and dirt will be deposited on the surface of insulators operating outdoors. In a dry state, pollution has little effect on the insulation capacity of insulators, and polluted insulators basically do not discharge. In weather conditions such as fog, drizzle, light rain, snowmelt, condensation, etc., the soluble electrolyte in the dirt absorbs water and forms a conductive water film, thereby reducing the insulation performance of porcelain insulators and increasing the probability of flashover. Since the environmental factors in an area are basically the same, the pollution of insu...

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Problems solved by technology

However, due to the short application time of the ultraviolet imaging method in the power system, the relevant research on how to quantify the detection results of ultraviolet imaging, how to extract characteristic parameters, ultraviolet image characteristics of pollution discharge and insulation state evaluation is still not in-depth. further research

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