External insulation configuration parameter measuring method for live-detection electrical equipment

Abstract

The invention discloses an external insulation configuration parameter measuring method for live-detection electrical equipment. The method comprises the steps: 1) a signal modulator generates a frequency signal to drive a laser emitter to emit a laser beam with stable wavelength; 2) the laser beam generates a narrowband scanning monochromatic laser ray through processing so as to perform scanning projection on the detected equipment; 3) the narrowband scanning monochromatic laser ray reflected by the detected equipment is acquired; 4) a three dimensional image for the detected equipment is obtained by means of processing of the acquired image information through a processing module, and the external insulation configuration characteristic parameter for the detected equipment can be obtained through calculation according to the three dimensional image; and 5) a laser reception and phase detection unit receives the laser ray, and can acquire the reference point cloud data on the laser ray on the surface of the detected equipment and correct the calculated result data. The external insulation configuration parameter measuring method for live-detection electrical equipment utilizes the monochromatic laser ray with stable wavelength to scan the detected equipment to restrain the information of other wave bands of the background, so that the accuracy for the related information of the image of the detected equipment can be improved.

Description

technical field [0001] The invention relates to a method for measuring external insulation configuration parameters of electric equipment for live detection, and belongs to the technical field of live detection for electric equipment in electric power systems. Background technique [0002] The configuration parameters of the external insulation of electrical equipment in substations include the minimum direct flash discharge distance of the external insulation of electrical equipment, the creepage distance of the equipment surface, and the creepage ratio distance of the outer surface of the equipment, etc. The necessary condition for its own safe operation is one of the prerequisites for ensuring the safe and stable operation of the power grid. During operation, the electrical equipment of the substation must bear the impact of atmospheric overvoltage, system operating overvoltage and normal operating voltage, and at the same time encounter pollution. , extreme natural disas...

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Problems solved by technology

[0002] The external insulation configuration parameters of substation electrical equipment include the minimum direct flash discharge distance of electrical equipment external insulation, equipment surface creepage distance, equipment external surface creepage ratio distance and other equipment external insulation series parameters. The necessary condition for its own safe operation is one of the prerequisites for ensuring the safe and stable operation of the power grid. During operation, the electrical equipment of the substation must withstand the impact of atmospheric overvoltage, system operating overvoltage and normal operating voltage, and at the same time encounter pollution. , extreme natural disasters and many other situations, in order to comprehensively take measures to prevent overvoltage and pollution flashover of the power grid, and improve the ability of the power grid to resist faults, it is necessary to detect and check the external insulation configuration parameters of electrical equipment during the operation and maintenance management process Although electronic theodolites, total stations and other measuring instruments can accurately measure targets in relatively large spaces, they cannot be effectively detected when the measurement activity space of substations is limited by the safe distance of live electricity, and the external dimensions of the detected equipment are complex. There are few researches on detection methods and means of external insulation configuration parameters of electrical equipment. Patents published in recent years (Patent No. 201110330908.5, 201410271701.9) etc. combine image sensors and laser emitters, and laser emitters emit laser lines to obtain equipment including laser lines. The image information is calculated and acquired, and the measurement of the monotonous background target is acceptable, but for the electrical equipment of the substation with a large number of equipment installed in a limited space, the shape, material, and color are basically the same and complement each other. The complex detection background cannot be accurately measured

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