Method for determining content of propane in insulating oil

A technology for insulating oil and propane, which is applied in the field of measuring the content of propane in insulating oil, can solve the problems that have not been reported and cannot effectively measure the content of insulating oil, and achieve the effect of meeting the requirements of fault diagnosis and analysis, good linear response, and accurate test results

Inactive Publication Date: 2017-12-29
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no document or standard that gives an absolutely credible partition coefficient value. Therefore, the application of the equilibrium degassing method cannot effectively determine the content of this component in the insulating oil. Therefore, only the full degassing method can be used. Oil-air separation of insulating oils to avoid partition coefficient calculations in test results
However, whether it is the equilibrium degassing method or the total degassing method, the test method for this component has not been reported so far.

Method used

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  • Method for determining content of propane in insulating oil
  • Method for determining content of propane in insulating oil
  • Method for determining content of propane in insulating oil

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Embodiment

[0026] A method for measuring propane content in insulating oil, using the following steps:

[0027] (1) After the gas chromatograph is turned on, wait for the baseline to stabilize, observe the baseline noise, and take three times the baseline noise value. Utilize gas chromatograph again to the standard gas sampling analysis of two kinds of concentrations, utilize the standard gas sampling detection result of high and low concentration to draw C 3 h 8 standard curve, such as figure 1 As shown, the prepared standard curve of propane gas content and gas chromatographic response value is: y=7.148x-6.6394, where x is the propane gas concentration in μL / L, and y is the gas chromatographic response value. It can be seen from the figure that C 3 h 8 The correlation coefficients of each are 0.9998, and the linear range is 0-135μL / L, indicating that the components have a good linear response;

[0028] (2) Take the insulating oil sample to be tested according to the fully sealed s...

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Abstract

The invention relates to a method for determining the content of propane in insulating oil. The method comprises the following steps: obtaining a to-be-tested insulating oil sample from high-voltage electrical equipment according to a full-seal sampling method; carrying out analysis on standard propane gas by using a gas chromatograph, and producing a standard curve of the content of the propane gas and a gas chromatographic response value; removing the gas dissolved in the insulating oil by using a full vacuum degassing device and then separating out the propane gas in the insulating oil by using a chromatographic column; detecting the gas chromatographic response value of the propane by using the gas chromatograph and contrasting the standard curve to obtain the concentration of the propane gas. The method disclosed by the invention is accurate in test result and can meet the requirements of fault diagnosis analysis of power equipment.

Description

technical field [0001] The invention relates to the field of measuring gas content, in particular to a method for measuring propane content in insulating oil. Background technique [0002] Through the dissolved gas components in insulating oil, it can be judged whether there are faults or latent defects in power equipment such as transformers, oil switches, oil-filled cables, bushings, and transformers, such as local overheating, discharge, and insulation aging. Therefore, oil Medium dissolved gas detection is the most important preventive and diagnostic test for oil-filled electrical equipment. Determination of dissolved gas content in insulating oil by gas chromatography is the current international general method, these gases mainly include: H2, CH 4 、C 2 h 6 、C 2 h 4 、C 2 h 2 , CO, CO 2 . Before sample injection in this method, it is necessary to use equilibrium degassing method (mechanical vibration degassing) or full vacuum degassing for oil and gas separation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/78G01N30/06
CPCG01N30/06G01N30/78
Inventor 邓先钦潘莹熊鸣翔厉敏宪徐鹏彭伟
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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