Intelligent power grid high voltage insulation damage monitoring system and method based on ultraviolet imagery

Abstract

The invention discloses an intelligent power grid high voltage insulation damage monitoring system and method based on ultraviolet imagery. Image acquisition is conducted on a high voltage insulation device through an acquisition module via an ultraviolet imager, and an RGB color image of corona discharge and arc discharge on the surface of the device is obtained; the RGB color image is converted into a grayscale image through a pre-processing module; a threshold segmentation method is adopted by a threshold segmentation sub-module, a threshold is set to convert the grayscale image into a binary image, and a discharging area in the image is divided; mathematical morphology filtering processing is conducted on the binary image through a morphological filter sub-module, and scatters are removed; an edge detecting sub-module conducts edge detection on the filtered image, edge pixel point position information is stored, colors of edge pixel points in the original image are changed, and a dividing effect image is obtained. The intelligent power grid high voltage insulation damage monitoring method based on ultraviolet imagery has the advantages of being efficient, simple, visual, imagery, safe and convenient, and not influencing normal operation of the device. With combination of the image division technology, the discharging area is divided, and accurate detection of high voltage insulation damage is achieved.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a system and method for monitoring high-voltage insulation damage of smart grids based on ultraviolet imaging. Background technique [0002] With the continuous expansion of the grid scale and the continuous improvement of power load requirements, the damage and failure of various types of high-voltage equipment used in the power system are also increasing. Correspondingly, the requirements for preventive maintenance are constantly increasing. The smart grid realizes the upgrading of the traditional power grid, meets people's increasingly higher requirements for power supply reliability and power resource quality, as well as the demand for new power generation technologies, such as solar power generation. China's smart grid is different from other countries. Foreign smart grids pay more attention to the field of power distribution, while my country pays more attention to the fie...

AI Technical Summary

Problems solved by technology

[0005] (1) Visual observation is one of the most commonly used methods, but a large number of electrical equipment accidents occur without the presence of visible light, and people often only hear the corona discharge sound of "beep" instead of seeing it to the discharge situation;

[0006] (2) Ultrasonic detection method is difficult to intuitively and accurately locate the long-distance discharge point, especially when multiple points are discharged at the same time, the positioning is more difficult;

[0007] (3) The leakage current online monitoring method needs to install corresponding measuring equipment in advance, which is not suitable for large-scale promotion and use;

[0008] (4) The infrared imaging observation method can detect the temperature rise caused by the accumulation of discharge or the internal fault of the equipment, but this is an indirect measurement method, and the discharge cannot be directly seen

[0010] At this stage, the insulation damage detection of power grid transmission lines and high-voltage substation equipment is generally analyzed manually using ultraviolet imagers, but this method can no longer adapt to the huge scale of smart grids and the complex natural environment in which transmission lines are located.

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