Method for determining content of propane in insulating oil

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...

AI Technical Summary

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.

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