Gas-dissolved-in-vegetable-insulating-oil analyzer with oil-gas separation function and detecting method

A technology of dissolved gas analysis and plant insulating oil, which is applied in the field of power grids, can solve the problem of less dissolved gas analysis in plant insulating oil, achieve high cost, and ensure stability and accuracy

Inactive Publication Date: 2017-02-01
HUNAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At the same time, the Ostwald coefficients of vegetable insulating oil and mineral insulating oil are also quite different. If the traditional mechanical oscillation method is directly used for the analysis of dissolved gases in vegetable insulating oil, it will lead to large errors.
[0006] In recent y

Method used

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  • Gas-dissolved-in-vegetable-insulating-oil analyzer with oil-gas separation function and detecting method

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Embodiment Construction

[0024] Such as figure 1 As shown, the dissolved gas analyzer and detection method in plant insulating oil with oil-gas separation function of the present invention include a vacuum degassing device 1, an air pump 2, a quantitative loop 3, a carrier gas supply A module 4, and a carrier gas supply B Module 5, Porapack column 6, delay column 7, restrictor column 8, molecular sieve column 9, thermal conductivity detector 10, filter / dryer 11 and necessary pipelines.

[0025] Such as figure 1 As shown, in the baseline state, the carrier gas filter / dryer 11 from the helium cylinder enters the carrier gas supply A module 4 and the carrier gas supply B module 5, and the functions of the above-mentioned carrier gas modules are mainly pressure and flow control . Then the carrier gas of the carrier gas supply A module 4 flows through the Porapack column 6 , the restrictor column 8 , and the channel A of the thermal conductivity detector 10 in sequence. The Porapack column 6 mainly real...

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Abstract

The invention discloses a gas-dissolved-in-vegetable-insulating-oil analyzer with an oil-gas separation function and a detecting method. The gas-dissolved-in-vegetable-insulating-oil analyzer with the oil-gas separation function and the detecting method are characterized in that helium serves as carrier gas, and the vacuum degassing and minitype thermal conductance chromatographic instrument combined technology is utilized for analyzing hydrogen, oxygen, nitrogen, carbon monoxide, carbon dioxide, methane, ethylene, ethane, dimethylmethane and acetylene in vegetable insulating oil. A four-chromatographic-column analysis system is adopted, a valve is utilized for column switching, gas pump circulating gas is adopted for sample introduction, all samples enter a chromatographic column A at a time, meanwhile, a chromatographic column B and a chromatographic column D are connected to the tail end of the chromatographic column A in series, and after hydrogen, oxygen, nitrogen, methane and carbon monoxide are exhausted, the original state of a ten-way valve is switched. Carbon dioxide, ethylene, acetylene, ethane and dimethylmethane firstly generate peaks on a channel A of a thermal conductivity detector, and hydrogen, oxygen, nitrogen, carbon monoxide and methane generate peaks on a channel B of the thermal conductivity detector. The instrument is high in sensitivity to the gas and suitable for being applied and popularized in smart power grids.

Description

[0001] 1. Technical field [0002] The invention belongs to the technical field of power grids, and relates to a gas-dissolved gas analyzer in vegetable insulating oil with an oil-gas separation function and a detection method, which are mainly used in the analysis of dissolved gas in vegetable insulating oil of oil-filled electrical equipment. [0003] 2. Background technology [0004] At present, mineral oil is generally used as insulating oil for oil-filled electrical equipment inside substations and power plants. Mineral insulating oil is a non-renewable resource with a low natural degradation rate, which will pollute the environment, and has a low ignition point and poor fire resistance. Vegetable insulating oil is an environmentally friendly and renewable liquid insulating medium. Its ignition point is higher than 300°C, and it is not easy to cause fire. The natural degradation rate reaches more than 90%, and it will not cause environmental pollution after leakage. In the...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/24G01N30/34
CPCG01N30/02G01N30/24G01N30/34
Inventor 范竞敏汪沨孙秋芹蒋勤稷周武吴志强
Owner HUNAN UNIV
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