Corona detection method based on ultraviolet photons

Abstract

The invention discloses a corona detection method based on ultraviolet photons, and the method comprises the following steps: (1) detecting a corona signal; (2) processing a pulse signal; (3) calibrating detection data; and (4) storing and analyzing the detection data. The detection method disclosed by the invention is convenient to operate and stable in test process, the data is reliable, and users can visually obtain the detection result by using the detection method. By utilizing the method provided by the invention remote non-contact detection based on the radiation of ultraviolet light generated by the detected corona can be realized, the time consumed in the detection process is short, the result is accurate and does not need to be solely processed by a computer, a report database can be generated, and the overall system is simple to operate and convenient to carry.

Description

technical field [0001] The invention belongs to the technical field of discharge monitoring of electrical detection devices in power systems, and in particular relates to a corona detection method and device based on ultraviolet photons, which are suitable for corona detection and fault judgment analysis of power transmission and transformation operation detection devices. Background technique [0002] High-voltage power lines are the lifeblood of the national economy. With the vigorous construction of high-speed rail and smart grids, the maintenance of power line power detection devices is even more important. The outer insulation structure of most high-voltage electrical detection devices in the power system has the characteristics of uneven electric field. In the extremely uneven electric field, when the voltage on the gas gap increases to a certain value, a highly conductive channel can be formed in the gap, which is called gas Gap breakdown. After the breakdown, there ...

AI Technical Summary

Problems solved by technology

Russia uses the atmospheric ultraviolet window for detection. This kind of camera does not work in the ultraviolet solar-blind band. It works well at night and cannot be used in the daytime; Israel and South Africa both use the solar-blind band for detection, successfully avoiding the interference of the sunlight background , but the data of corona ultraviolet radiation intensity cannot be directly obtained, it is not easy to quantitatively analyze the corona discharge ultraviolet radiation intensity, and it is difficult to form an objective identification of corona failure intensity; corona detection in the United States uses high-precision image overlapping Technology, high-precision overlapping of dual optical lenses, domestic Bogao uses ordinary CCD and ultraviolet optical filter, adopts glass lens replacement method, superimposes and analyzes visible light imaging pictures and ultraviolet images, both of which have high requirements for optical systems, imaging Long time, not suitable for cruising dynamic detection

There are two ways to make up for the lack of sensitivity of ordinary ultraviolet imagers: the signal is strengthened by the chip, the advantage is that the spot is enlarged, and the disadvantage is that a black shadow will be formed under each corona image, and the corona image has a sense of distortion; increase the wavelength range , using the night mode, the advantage is that the ultraviolet wave energy is enhanced, the disadvantage is that it can only be detected at night

At present, ultraviolet corona detection and detection devices generally superimpose images on frames to enhance the visible intensity of ultraviolet images, and reduce image noise through software and hardware noise reduction technology for video signals, which requires a computer for analysis and processing, with high power consumption and volume. Large, inconvenient to carry, complex operation, complex structure, high manufacturing cost, high maintenance cost, expensive price, unable to dynamically output photon number, short detection distance, high requirements for image processing, high-precision optical system, difficult to meet airborne patrolling inspection requirements

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