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Characterization method of transformer oil aging

A technology for transformer oil and characterization, applied in the direction of material inspection products, can solve problems such as poor accuracy, and achieve the effect of improving monitoring capabilities

Active Publication Date: 2016-12-21
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the characterization methods in the prior art mainly make indirect judgments based on empirical values, and the accuracy is poor.
[0004] Up to now, there is no method at home and abroad that can directly and accurately characterize the aging of transformer oil.

Method used

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  • Characterization method of transformer oil aging
  • Characterization method of transformer oil aging
  • Characterization method of transformer oil aging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Actual transformer oil sample analysis experiment:

[0067] The content of oxygen element in the transformer oil that has been in operation for more than 15 years, the transformer oil after regeneration and adsorption treatment and the new transformer oil are respectively measured. The specific steps are as follows:

[0068] Use JY / T017-1996 element analyzer to measure the content of oxygen element in the above three groups of transformer oils according to JY / T017-1996 element analyzer method general rule.

[0069] Among them, the temperature control program is as follows: conduct the first temperature control at 1000°C to 1100°C and keep it for 0.8min to 1.2min; perform the second temperature control at 550°C to 600°C and keep it for 3min to 4min; Temperature control for the third time at ℃~105℃, keep for 10min~15min; the carrier gas is helium; the purity of the carrier gas is ≥99.99%, and the moisture content is ≤10 - 6 g / L; the accuracy of oxygen element analysis i...

Embodiment 2

[0074] Determination of oxygen content in transformer oil:

[0075] (1) Perform pretreatment on the transformer oils whose antioxidants in the six groups are 2,6-di-tert-butyl-p-cresol and have been in operation for more than 15 years: take 25mL of the above-mentioned transformer oils accurately, and vacuum-dry them for 3 hours. Get 6 groups of transformer oil to be tested.

[0076] (2) Detect the content of antioxidants in 6 groups of transformer oils to be tested respectively, obtain the content of antioxidants in 6 groups of transformer oils to be tested to be respectively 0.300%, 0.295%, 0.310%, 0.305%, 0.298% and 0.303% ; Then by the formula: oxygen element content in 2,6-di-tert-butyl-p-cresol ×molecular weight of oxygen element / 2,6-di-tert-butyl-p-cresol molecular weight=content of oxygen element in antioxidant in transformer oil 0.022%, 0.021%, 0.023%, 0.022%, 0.022% and 0.022%, respectively.

[0077] (3) Measure the total content of oxygen in 6 groups of transformer...

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Abstract

The invention provides a characterization method of transformer oil aging. The characterization method comprises the following steps: a) quantitatively detecting the content of oxygen element in different aging degrees of transformer oil by adopting an established quantitative detection method for oxygen elements in the transformer oil, to obtain the relationship between the content of oxygen element in the transformer oil and the aging degree of the transformer oil; b) quantitatively detecting the content of oxygen element in a plurality of groups of transformer oil practically running, and comparing the detection results with the relationship between the content of oxygen element in the transformer oil and the aging degree of the transformer oil obtained in the step a), thus completing the characterization on the aging of the transformer oil. According to the characterization method of transformer oil aging, the aging degree of the transformer oil can be characterized by determining the content of oxygen element in the transformer oil, and the quantitative detection method on the content of oxygen element in the transformer oil can be established. The characterization method provided by the invention is good in accuracy and simple to operate, and plays an important role in further improving the specification of the running transformer oil.

Description

technical field [0001] The invention relates to the technical field of transformer oil detection and analysis, establishes a quantitative detection method for oxygen elements in transformer oil, and more specifically relates to a characterization method for transformer oil aging. Background technique [0002] Transformer oil is mineral insulating oil after petroleum products have been refined and processed. Its main components are alkanes, cycloalkanes and aromatic hydrocarbons, mainly hydrocarbons. Transformer oil is an important liquid insulating medium used for insulation, cooling and arc extinguishing in power equipment. Since transformer oil is used as a liquid insulating medium, it is required to have excellent insulating properties. However, studies have shown that in actual transformers, with the prolongation of operation time, the transformer oil will oxidize and age, and generate free radicals, alcohols, aldehydes, ketones, acids, esters, and sludge, which seriousl...

Claims

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Application Information

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IPC IPC(8): G01N33/28
CPCG01N33/28
Inventor 张丽钱艺华苏伟陈天生范圣平付强
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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