Method and system for evaluating corona discharge of electric power transmission and transformation device

Abstract

The embodiment of the invention discloses a method for evaluating the corona discharge of an electric power transmission and a transformation device. The method comprises the following steps of acquiring a RGB (red, green and blue) image of the corona discharge, and processing the RGB image by adopting an image frame as a unit to obtain a plurality of processed images with the image frame sequence number being continuous; converting each processed image to a binary image, processing the binary images, acquiring a plurality of light spot areas and a light spot area value of each light spot area from the binary image; drawing a correlation curve of the light spot area value and the time, evaluating the corona discharge state at different time according to the drawn curve, wherein the discharge intensity of the power transmission and transformation device is large on the moment if the light spot area value on the moment is greater than a preset threshold value. The embodiment of the invention also discloses a system for evaluating the corona discharge of the electric power transmission and transformation device. By adopting the method and the system for evaluating the corona discharge of the electric power transmission and transformation device, the problem in the prior art that a corona discharge evaluation method based on ultrasonic imaging characteristic-photo number is large in statistics error when the area in which the power transmission and transformation device stays is provided with a plurality of adjacent discharge points can be solved.

Description

technical field [0001] The invention relates to the technical field of corona discharge of power transmission and transformation equipment, in particular to a method and system for evaluating corona discharge of power transmission and transformation equipment. Background technique [0002] Corona discharge is the main problem in the electromagnetic environment of power transmission and transformation equipment, which will bring a series of problems, such as strong electric field, audible noise, radio interference, etc. According to the IEEE standard definition, corona is a luminous discharge phenomenon caused by the ionization of the air around the charged conductor caused by the electric field strength exceeding the critical value. As the voltage level increases, the field strength on the surface of the power transmission and transformation equipment will increase, especially on rough surfaces. Due to the high local field strength, the uneven distribution of the surface fie...

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method and system for evaluating corona discharge of power transmission and transformation equipment, which can solve the problem in the prior art when there are multiple adjacent discharge points in the area where the power transmission and transformation equipment is located. - The corona discharge evaluation method of the number of photons has a problem with a large statistical error

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