Portable Raman spectrum diagnosis device and method for oil-paper insulation aging state

Abstract

The invention discloses a portable Raman spectrum diagnosis device and method for an oil-paper insulation aging state. The device comprises a damping vibration isolation optical platform (1), a laser(5), a light path system (4), a camera (6), an objective lens (7), an adjustable objective table (9), a cuvette (8), a spectrograph (3), a CCD (2) and a computer (10), wherein the laser is emitted bythe laser (5), passes through the light path system (4) and is focused on a sample through the objective lens (7), and the camera (6) is matched to observe a focusing condition; during focusing, a distance between the sample and the objective lens (7) is adjusted through the adjustable objective table (9), the laser is focused into a to-be-detected sample which is contained in the cuvette (8), anda stable Raman scattering signal of the sample is excited; the Raman scattering light of the sample passes through the light path system (4), is collected by the spectrograph (3) and the CCD (2) andis transmitted to the computer (10) for display, analysis and storage. The diagnosis device and method are suitable for a new method for in-situ detection of transformer oil-paper insulation aging monitoring, and the online monitoring level of transformer oil-paper insulation aging is improved.

Description

technical field [0001] The invention belongs to the field of on-line monitoring and fault diagnosis of electrical equipment insulation, and in particular relates to a Raman spectrum diagnosis device and method for the aging state of oil-paper insulation Background technique [0002] During the aging process of oil-paper insulation equipment, the insulating oil and insulating paper will decompose and produce CO, CO, furfural, methanol, acetone and other substances that reflect the degree of aging and dissolve in the oil, so that the insulating oil contains a large amount that can reflect the aging of the insulation. State information, analysis of aging characteristics in the oil, and accurate diagnosis of the aging degree of oil-paper insulation materials can provide a basis for the life cycle management of oil-immersed substation equipment, which is to improve equipment utilization, reduce equipment maintenance costs, and improve equipment operation. It is one of the key iss...

AI Technical Summary

Problems solved by technology

The existing oil-paper insulation aging state diagnosis still mainly refers to the threshold value of single aging characteristic parameters such as furfural, acetone, and degree of polymerization, or based on the analysis method of dissolved gas in oil. The calculation process is very complicated and the diagnostic accuracy needs to be improved. An effective method for on-site diagnosis of the aging state of oil-paper insulation equipment

On the other hand, the detection (charged or off-line) of insulation aging characteristics dissolved in different oils still stays at the level of analyzing different characteristics with different equipment, and most of them need to be separated or extracted from the oil. The laboratory analysis is completed, requiring a lot of equipment, complicated testing procedures, and in-situ detection in oil cannot be realized

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