Device for detecting dissolved gas in transformer oil

Abstract

The invention discloses a device for detecting dissolved gas in transformer oil. The device comprises a power supply used for power supply, a main controller used for controlling, a chopper filter module, a photoacoustic detector and a laser assembly; the chopper filter module comprises an infrared source, a chopper modulating disc and a filter disc; the photoacoustic detector comprises a photoacoustic cell used for enabling detected gas to generate photoacoubtic signals under irradiation stimulation of specific-wavelength light; the laser assembly comprises a laser used for emitting single-wavelength laser. By the laser light source, interference of other gases on C2H2 gas high in specification can be avoided, and accuracy and flexibility in detection are quite high due to high light energy of the light source; meanwhile, other components (such as C2H4, C2H6, CH4, CO and CO2) of the dissolved gas of a transformer can be detected, and detection requirements of an electrical power system on the transformer oil can be met. The device is relatively simple in light path structure and lower in cost than that of double-laser light source, and more gas components are detected.

Description

technical field [0001] The invention relates to the field of detection instruments, in particular to a gas detection device. Background technique [0002] Under the action of heat and electricity, transformer oil will gradually age and decompose, and will slowly produce a small amount of low-molecular hydrocarbons. When there are fiber materials at the fault site, it will also produce CO and CO 2 gas. When there are latent partial overheating and partial discharge faults inside the transformer, the rate of gas production will be accelerated. Generally speaking, for faults of different nature, the gases produced by the decomposition of insulating materials are different; for faults of the same nature, the amount of gas produced is also different due to different degrees. Therefore, according to the composition and content of the gas in the oil, the nature and severity of the fault can be judged. [0003] According to GB / T7252-2001 "Guidelines for the Analysis and Judgment ...

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Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a detection device for dissolved gas in transformer oil, which can solve the problem that the existing detection device detects single gas, the precision and accuracy of gas detection are poor, and it cannot reflect the quality of transformer oil well. quality problem

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