Insulator hydrophobicity grade judgment method based on improved Canny algorithm
A technology of insulators and hydrophobicity, applied in the field of grade judgment, can solve the problems of inability to judge the grade of hydrophobicity, unsuitable for big data classification, etc., and achieve the effect of improving accuracy
Pending Publication Date: 2020-09-15
STATE GRID XINJIANG ELECTRIC POWER CO URUMQI ELECTRIC POWER SUPPLY CO +2
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Therefore, this method cannot judge all hydrophobicity grades
The SVM decision tree method has a great relationship with the amount of data and is not suitable for classifying large data
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[0036] The working principle of the present invention: water presents different forms on the surface of composite insulators with different hydrophobicity grades. shape attached to the surface of the insulator. However, on the surface of the composite insulator with a hydrophobicity level of HC7, it is almost impossible to form round water droplets, and it adheres to the surface of the insulator in the form of a large area of water film. At the same time, due to environmental factors, there are many kinds of dirt on the surface. According to this characteristic, the level of hydrophobicity can be judged.
[0037] Such as figure 1 As shown, the method for judging the hydrophobicity level of insulators based on the improved Canny algorithm includes the following steps:
[0038] Step 1: Collect several original images (color) of insulators of various hydrophobic levels after simulated rainwater spraying through the electronic camera on the high-voltage electricity tower, amon...
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The invention discloses an insulator hydrophobicity grade judgment method based on an improved Canny algorithm. The insulator hydrophobicity grade judgment method comprises the following steps: collecting a plurality of original images of an insulator sprayed by simulated rainwater; converting the original image into a grey-scale map; enhancing the image contrast and denoising; obtaining the edgeof the denoised image by using a canny algorithm; carrying out breakpoint connection on the edges which cannot be effectively identified by the canny algorithm; carrying out contour morphology fillingon the images after breakpoint connection; solving characteristic parameters of the filled image and normalizing the characteristic parameters; sending the normalized characteristic parameters of thetraining sample into a neural network model for training to obtain an insulator hydrophobicity judgment model; and inputting the normalized characteristic parameters of each test sample into an insulator hydrophobicity judgment model to obtain the hydrophobicity grade of each test sample. According to the method, the hydrophobicity grade of the insulator can be accurately identified, the identification accuracy is high, live detection can be carried out, the operation and inspection cost of power equipment is greatly reduced, and the safety is improved.
Description
technical field [0001] The invention belongs to the field of detecting the running state of power transmission and transformation equipment, in particular to a method for judging the hydrophobicity level of insulators based on the improved Canny algorithm. Background technique [0002] The level of hydrophobicity on the surface of outdoor insulators will inevitably change, and the hydrophobicity of the surface of silicone rubber insulators will show a downward trend with the operation time and the influence of comprehensive factors such as corona, flashover, pollution, temperature, rain and snow. Or even lose it completely. The decline in hydrophobicity and hydrophobic migration characteristics of silicone rubber insulators is manifested in the lower pollution flashover resistance, which poses a threat to the safe and stable operation of the power system. [0003] So far, experts and scholars at home and abroad have conducted a lot of research and experiments on the detecti...
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IPC IPC(8): G06T7/00G06K9/62G06T5/00G06T7/13G06T7/155G06T7/62
CPCG06T7/0004G06T7/13G06T7/62G06T7/155G06T2207/20081G06T2207/20084G06F18/214G06T5/90G06T5/70
Inventor 刘彪袁文海王喆徐浩赛涛董小顺韩昊臧其贤宋昆峰黄新民宋学东马海军徐雅新杨莉张君浩李巧荣汪沨钟理鹏司羽飞李杰黄杰
Owner STATE GRID XINJIANG ELECTRIC POWER CO URUMQI ELECTRIC POWER SUPPLY CO