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Fourier transform infrared spectrum quantitative analysis-based transformer oil-immersed gas analysis system and analysis method thereof

A gas analysis system, Fourier transform technology, applied in the direction of color/spectral characteristic measurement, material analysis through optical means, material analysis, etc., can solve problems such as difficult to distinguish, and increase safety risks and operating costs The effect of low and short analysis times

Inactive Publication Date: 2011-02-16
XI AN JIAOTONG UNIV
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Problems solved by technology

Therefore, it is difficult to distinguish. If a spectrogram of a mixture of these gases is given, it is even more difficult to distinguish which components are contained in the mixture and the concentration of each gas

Method used

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  • Fourier transform infrared spectrum quantitative analysis-based transformer oil-immersed gas analysis system and analysis method thereof
  • Fourier transform infrared spectrum quantitative analysis-based transformer oil-immersed gas analysis system and analysis method thereof
  • Fourier transform infrared spectrum quantitative analysis-based transformer oil-immersed gas analysis system and analysis method thereof

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Embodiment Construction

[0031] Due to the many types of gas analyzed, it would be troublesome to list the name of each component gas every time it occurs in the embodiment. For convenience, without loss of generality, in this embodiment, methane, ethane and propane to illustrate the spectroscopic analysis of multicomponent gases. The spectrometer used is Bruker’s Tensor27 Fourier transform mid-infrared spectrometer with a spectral resolution of 1 cm. -1 . Embodiment specifically comprises the following steps:

[0032] 1) Oil and gas separation

[0033] The method of oil and gas separation can be currently commonly used oil and gas separation methods: membrane ventilation method, vacuum extraction method, air circulation method, capillary column method and hollow fiber tube method.

[0034] 2) Spectrum acquisition

[0035] A background scan of the clean gas cell is performed prior to the normal spectral scan. A clean cell is one where there is only nitrogen in the cell. Then the gas to be analyz...

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Abstract

The invention discloses a Fourier transform infrared spectrum quantitative analysis-based transformer oil-immersed gas analysis system and an analysis method thereof. The system comprises a first transformer oil valve, a second transformer oil valve, an oil-gas separation device, a Fourier transform infrared spectrometer with an air chamber, a computer, an oil inlet pipe, a return oil pipe and a gas conveying pipeline. The analysis method comprises the following steps of: performing oil-gas separation on the transformer insulating oil, and then quantitatively analyzing the separated gas by using the Fourier transform infrared spectrometer to realize quick and quantitative analysis of the multi-component gas. The analyzed gas comprises iso-butane, n-butane, carbon monoxide, propylene, propyne, sulfur hexafluoride and water vapor besides methane, ethane, propane, ethylene, ethyne and carbon dioxide in conventional transformer oil-immersed gas analysis. Because of more categories of the analyzed gas, high speed, high resolution, low running cost, safety and reliability, the method is a transformer oil-immersed gas analysis method with broad application prospect.

Description

technical field [0001] The invention relates to transformer fault diagnosis technology, relates to an online quantitative analysis system and analysis method of transformer oil immersion gas components, and in particular to a transformer oil immersion gas analysis system and analysis method based on Fourier transform infrared spectrum quantitative analysis. Background technique [0002] The transformer is one of the most critical equipment in the power system, and its normal operation is related to the normal operation of the entire power grid. The composition and concentration analysis of transformer oil immersion gas is one of the basis for transformer fault judgment. At present, the analysis of gas in transformer oil is mostly carried out by gas chromatography, among which the gas monitoring system in transformer oil of Ningbo Science and Technology Monitoring Technology Co., Ltd. occupies a large market, such as MGA2000-6. Although this online analysis technology is rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01J3/28G01N21/3504
Inventor 汤晓君刘君华孟永鹏姚建军成永红
Owner XI AN JIAOTONG UNIV
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