Method for measuring and analyzing content of acetone contained in power transformer oil

A technology for power transformers and transformer oil, which is applied in the direction of analyzing materials, instruments, measuring devices, etc., can solve the problems of no literature reports on the measurement method, achieve good promotion and application prospects, and the effect of convenient and easy testing

Active Publication Date: 2009-12-02
SHAANXI ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

So far, there is no literature report in this field about the assay method of trace acetone in transformer oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0011] 1. Preparation of standard acetone oil dilution: Accurately weigh 0.1000g of acetone (analytical grade) into a 100ml volumetric flask, add new transformer oil without acetone to the mark, shake well, and obtain standard acetone containing 1000mg / L acetone Oil stock solution: Accurately pipette 10ml of standard acetone oil stock solution into a 100ml volumetric flask, add new transformer oil without acetone to the mark, shake well, and obtain the primary dilution of standard acetone oil containing 100mg / L acetone; accurately pipette Take 10ml of standard acetone oil primary dilution in a 100ml volumetric flask, add acetone-free new transformer oil to the mark, shake well, and obtain a standard acetone oil dilution containing 10mg / L acetone;

[0012] 2. Production of standard acetone content curves: Add standard acetone oil diluents 0.75ml, 1.50ml, 3.00ml, 6.00ml, 9.00ml, 12.00ml respectively into six 25ml headspace bottles with stoppers (Shimadzu, Japan), Then add 14.25m...

Embodiment

[0024] Pipette 6 parts of 15.00ml of the same transformer oil sample (Longyang No. 1) and place them in six 25ml headspace bottles, tighten the bottle caps with Teflon, and place each headspace bottle in a 60°C water bath Equilibrate for 30 minutes, shake the headspace bottle 3 times during the period, quickly extract 0.50ml of headspace with a 1ml syringe and inject it into the gas chromatograph for precision experiment; Column temperature: 45°C, inlet temperature: 180°C, 99.999% high-purity nitrogen gas flow rate: 1.5ml / min, detector: hydrogen flame ionization detector, 200°C, gas injection volume 0.50ml) to measure acetone Peak area; the concentration of acetone in the transformer oil to be tested calculated by the external standard method is: 1.445mg / L, 1.480mg / L, 1.330mg / L, 1.355mg / L, 1.438mg / L, 1.378mg / L, The average value was 1.404 mg / L, the standard deviation (SD) of the results was 0.059, and the relative standard deviation (RSD%) was 4.2%.

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PUM

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Abstract

The invention relates to a method for measuring and analyzing the content of acetone contained in power transformer oil for judging the insulating degree of a power transformer, adopting a static headspace gas chromatography method to measure the content of the acetone contained in the power transformer oil, i.e. a certain amount of transformer oil samples are added into a headspace bottle with certain volume to be heated and balanced under the temperature of 55 DEG C to 65 DEG C so that the acetone contained in the transformer oil samples is quantificationally vaporized, the content of the acetone contained in original oil samples is determined by measuring headspace gas inside a balance system, and then the information of an insulation and aging state of the inner part of the power transformer is analyzed and diagnosed.

Description

technical field [0001] The invention belongs to the technical field of electric equipment detection methods, and relates to a method for measuring and analyzing acetone content in power transformer oil for judging the insulation degree of power transformers. Background technique [0002] The power transformer is one of the most important equipment in the power transmission and transformation system. The quality of its insulation is a crucial factor related to the safe and reliable operation of the power system. Previous studies and practices have shown that dissolved CO, CO 2 、H 2 The content of such gas components can objectively reflect the information of the aging state of the internal insulation of the transformer, and then discover the potential defects and faults of the transformer. In the prior art, gas chromatography is used to measure CO, CO in transformer oil 2 、H 2 , O 2 、CH 4 、C 2 h 6 、C 2 h 4 、C 2 h 2 Such gases have been widely used in electric powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/00
Inventor 刘孝为王宏王振军薛科社陈国亮陈楚羽李悦兰莉红
Owner SHAANXI ELECTRIC POWER RES INST
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