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Low-concentration transformer oil chromatography secondary degassing analysis method

A transformer oil and secondary degassing technology, which is applied in the direction of analytical materials, instruments, scientific instruments, etc., can solve the problems of undetectable gas components and low content, and achieve the effect of convenient testing, simple operation and high accuracy

Pending Publication Date: 2021-02-02
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a low-concentration transformer oil chromatographic secondary degassing detection and analysis method to solve the problem that when the transformer oil sample detection and analysis fails, it is necessary to go to the site to re-sample, or when the sample detection fails due to the low content of dissolved gas in the oil. The secondary injection balance carrier gas method cannot detect certain gas components, etc.

Method used

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  • Low-concentration transformer oil chromatography secondary degassing analysis method
  • Low-concentration transformer oil chromatography secondary degassing analysis method
  • Low-concentration transformer oil chromatography secondary degassing analysis method

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Embodiment 1

[0047] A low-concentration transformer oil chromatographic secondary degassing analysis method of the present invention is performed by adding standard mixed gas to the oil sample after the failure of the transformer oil chromatographic detection and analysis for secondary degassing detection, and calculating the components of the dissolved gas in the oil The content is divided into the following steps:

[0048] 1) Collect transformer oil samples according to "GB / T 7595 Electric Power Oil (Transformer Oil, Turbine Oil) Sampling Method", and collect 40mL oil samples with a 100mL syringe;

[0049] 2) According to "GB / T 17623 Gas Chromatographic Determination of Dissolved Gas Component Content in Insulating Oil", perform detection and analysis, inject about 5mL of balanced carrier gas into the 40mL oil sample syringe (the balanced carrier gas is the same as that used by the gas chromatograph, The volume does not need to be precise and does not participate in the calculation), pla...

experiment example 1

[0076] Take a low-concentration transformer oil sample, first inject a balanced carrier gas for analysis according to the test method required by "GB / T 17623 Gas Chromatographic Determination of the Content of Dissolved Gas Components in Insulating Oil", obtain a degassing analysis result, and then send it to the After the primary detection and analysis, standard mixed gas was injected into the remaining oil samples for detection and analysis, and the secondary analysis results were obtained, and the concentration of each component in the initial oil sample was calculated and corrected by formula (6). The test results are shown in Table 3.

[0077] It can be seen from Table 3 that after the transformer oil sample was degassed and analyzed once, the gas concentration in the remaining oil sample was further reduced, which was lower than the minimum detection concentration of the test method (C 2 h 2 and H 2 ), if you continue to use the method of injecting balanced carrier gas ...

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Abstract

The invention belongs to the field of transformer oil chromatography detection and analysis of oil-filled electrical equipment and relates to a low-concentration transformer oil chromatography secondary degassing analysis method, which is based on a standard method of transformer oil chromatography analysis and utilizes the principle that a distribution law and a material balance principle are followed in an oscillation degassing process. The method comprises the following steps: adding a certain amount of standard mixed gas into a transformer oil sample remaining after failure of first detection, carrying out oscillation degassing analysis to obtain the total content of each component gas in the system, and calculating to obtain the content of each component of the dissolved gas in the initial oil sample. The method is simple to operate and solves the problem that resampling is needed when sample detection fails, saves a large amount of material resources, financial resources and human resources; the problem that the gas concentration cannot be detected due to secondary injection of the balance carrier gas during secondary degassing detection of the low-concentration sample is solved. Meanwhile, the method can be applied to inspection and verification of detection results of low-concentration samples.

Description

technical field [0001] The invention belongs to the technical field of chromatographic detection and analysis of transformer oil for oil-filled electrical equipment, and relates to a secondary degassing analysis method of low-concentration transformer oil chromatographic analysis. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Transformer is an important equipment widely used in power generation and power supply units to convert electric energy. The function of the transformer is not only to increase the voltage to send electric energy to the power consumption area, but also to reduce the voltage to the voltage used at all levels to meet the needs of power consumption. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/14
CPCG01N30/02G01N30/06G01N30/14G01N2030/025G01N2030/062
Inventor 亓秋波于乃海张瑞强齐国栋胥婷郝亚楠陈义民李嫱张利孟
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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