Alternating current transmission line insulator contamination condition detection method based on infrared thermography

Abstract

The present invention discloses an alternating current transmission line insulator contamination condition detection method based on infrared thermography, wherein an infrared thermal imager is adopted to shoot an insulator thermal field image, an image treatment technology is adopted to extract an insulator image, relevant characteristic quantities are calculated, an environmental temperature and an environmental humidity are combined, and genetically-optimized neural network training is adopted so as to judge a contamination level of the insulator in the infrared image. The detection method has the following advantages that: an insulator contamination condition can be detected under a condition of no power failure, installation of any equipment on a pole tower is not required, operation cost and maintenance cost are low, operations are simple, use is safe and reliable, and detection accuracy is high.

Description

technical field [0001] The invention relates to the field of maintenance of the running state of power transmission and transformation equipment, in particular to a method for detecting the pollution state of an AC transmission line insulator based on an infrared thermal image. Background technique [0002] During the operation of the transmission line, various particles or bird droppings such as dust, saline, and industrial smoke in the air will accumulate on the outer surface of the insulator to form a dirty layer, which will reduce the insulation strength of the insulator, and pollution flashover will easily occur, causing great economic losses. loss. If the degree and nature of pollution can be effectively measured, it is possible to avoid power outages caused by pollution flashovers. [0003] In order to accurately determine the cleaning or flushing cycle of insulators, the methods used at home and abroad to detect the pollution value of insulators mainly include the e...

AI Technical Summary

Problems solved by technology

Although the leakage current method can reflect more serious insulation faults, the time left for the operator to deal with after the insulation failure is judged is limited, so it is difficult to be widely used alone, and it requires a set of detection devices to be installed on each insulator string, which is too expensive High, the maintenance and overhaul of the device needs to be carried out with power off

[0004] Although the infrared imaging method has been used in the detection of insulators, there is no specific method for judging the pollution degree of insulators, and it has not been practically applied in pollution detection

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