Insulator external discharge mode identification method based on ultraviolet map

Abstract

The invention relates to an insulator external discharge mode identification method based on an ultraviolet map. The method is characterized in that the method comprises the following steps: a) to begin with, carrying out non-contact detection on insulator external discharge by utilizing an ultraviolet imager and forming an ultraviolet discharge image; b) carrying out gray scale processing on the obtained ultraviolet discharge image and converting a color picture into a binary gray image; c) then, carrying out mathematical morphology filtering on the binary gray image to obtain a clear ultraviolet light spot binary gray map; d) carrying out constant-torch characteristic parameter extraction on the ultraviolet light spot binary gray map obtained after filtering, and seven constant-torch characteristic parameters are extracted; and e) inputting the seven constant-torch characteristic parameters into a neural network to carry out discharge type mode identification, and outputting the identification results. Experiment shows that the ultraviolet detection map is utilized to carry out mode recognition of insulator external discharge, and the method has the advantages of high identification degree and simple method.

Description

technical field [0001] The invention relates to an insulator external discharge pattern recognition method based on ultraviolet spectrum. Background technique [0002] Insulators are the most widely used insulation equipment in power systems, and have a large number of applications in lines and substations. During operation, insulators will cause external discharge due to surface pollution, condensation, burrs, etc. Long-term external discharge will lead to a decline in their insulation performance, and even lead to serious damage, leading to grid accidents. There have been many accidents caused by external discharge of insulators in the domestic power grid, so strengthening the detection and analysis of external discharge of insulators is the key to avoiding such accidents. Ultraviolet imaging detection is a non-contact detection method for external discharge of electrical equipment developed in recent years and widely used in the field. At present, the sun-blind ultravio...

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Problems solved by technology

[0003] The current UV detection results are mostly presented in the form of UV pictures or videos, which can give an intuitive quantification of whether discharge occurs and the number of discharge photons, but cannot give further detailed results, such as the surface contamination of the insulator. Whether it is discharge or surface condensation discharge cannot be given, which also limits further analysis of on-site test results

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