Operation switch device internal defect determination method based on SF gas decomposition products

Abstract

The invention provides an operation switch device internal defect determination method based on SF6 gas decomposition products, comprising steps of using a gas chromatography detection system to detect the SF6 gas decomposition products of the operation switch device, performing statistic on the detection results of the SF6 gas decomposition products to determine the characteristic gas of the decomposition products and the characteristic parameter of the characteristic gas, and determining the internal defect type of the operation switch device according to the characteristic vector. Compared with the prior art, the invention establishes the characteristic parameter determination method for the SF6 gas decomposition products under various device faults and improves the reliability and the effectiveness of the switch device internal defect determination.

Description

technical field [0001] The invention relates to the technical field of electrical equipment detection, in particular to a SF-based 6 Method for judging internal defects of operating switchgear based on gas decomposition products. Background technique [0002] During the long-term operation of switchgear, SF6 gas insulated switchgear has defects such as discharge and overheating during operation, which affects the safe operation of the equipment. Field experience shows that the detection method of SF6 gas decomposition products can effectively detect the internal defects of the equipment, and it is necessary to propose an effective equipment defect judgment method to detect equipment defects in time and avoid accidents caused by equipment failures. [0003] The traditional electrical equipment detection methods and partial discharge detection methods of switchgear have certain constraints, and it is difficult to detect internal defects of the equipment in a timely and effect...

AI Technical Summary

Problems solved by technology

Due to the complex operating conditions of the equipment, the detection results of SF6 gas decomposition products are affected by many factors, which are related to environmental conditions and equipment structure, such as the air content and water content of the gas, the size of the equipment gas chamber, and the opening and closing current. It will greatly affect the composition and content of SF6 gas decomposition products in the equipment

It can be seen that the absolute value of a single component content of SF6 gas decomposition products is difficult to use to judge equipment defects or operating status, and the operability of on-site equipment live detection or status detection is poor, so it is necessary to improve the equipment status judgment index

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