Measuring method for the furfural content of transformer oil

A measurement method and technology of transformer oil, applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of strong irritation, high toxicity, hematopoietic system changes, etc., and achieve the effect of convenient operation and low toxicity

Inactive Publication Date: 2013-06-12
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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Problems solved by technology

[0004] This method adopts toluene as solvent when the universal solution is prepared, because toluene has greater toxicity and stronger irritation, which seriously affects the laboratory

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  • Measuring method for the furfural content of transformer oil
  • Measuring method for the furfural content of transformer oil

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Embodiment Construction

[0018] This method adopts the new oil that does not contain furfural as solvent to dissolve the furfural standard substance when preparing the universal solution, dilutes an aliquot of universal solution in a certain amount of new oil that does not contain furfural, and is used to prepare the standard solution of the desired concentration to calibrate the equipment. Then refer to the (IEC1198-1993) method, use methanol as the extractant to enrich furfural in the oil, choose a mixed solution of methanol and water as the mobile phase, and use liquid chromatography for detection under the conditions of the best detection wavelength and flow rate , calculate the furfural content in the oil according to the peak area or peak height of the chromatogram.

[0019] 1. Instruments and materials: PE high-performance liquid chromatography; PE high-performance liquid chromatography workstation data processing system; variable wavelength scanning ultraviolet detector; mechanical vibration t...

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Abstract

The invention relates to an analysis method for transformer oil. A measuring method for the furfural content of transformer oil comprises: a step of preparation of furfural standard oil, a step of preparation of a standard sample and a sample, and a step of sample analysis. The step of the preparation of the furfural standard oil comprises 1) preparation of a general solution: weighing 0.01g-0.03g standard material 2-furfural, placing in a brown volumetric flask, fully dissolving and diluting to the mark with new oil containing no furfural to obtain a furfural general solution with a certain concentration which is stored away from light for two days for use; 2) preparation of the standard solution: diluting one equal part of general solution with a certain amount of new oil containing no furfural to prepare a standard solution of a desired concentration, wherein the desired concentration includes 0.5 mg/kg, 1.0 mg/kg, 5.0 mg/kg and 10.0 mg/kg, and the standard solution is stored away from light and in brown reagent bottle. The method provided by the invention has the characteristics of low toxicity, and convenient operating, and can meet the production requirements.

Description

technical field [0001] The invention relates to a transformer monitoring method, in particular to a transformer oil aging detection method. Background technique [0002] Transformer is one of the most important electrical equipment in the power system. Its safe and stable operation is closely related to the aging degree of its insulating paper. As the operating life of the transformer increases, the insulating paper of the transformer will continue to age, and the insulation performance will also decline. An effective method to analyze and judge the aging degree of transformer insulating paper is to detect the furfural content in transformer oil. At present, the detection method of furfural content in transformer oil mainly adopts liquid chromatography. Furfural is one of the final products of insulating paper after a series of complex chemical reactions such as thermal degradation, oxidative degradation and water degradation. At the operating temperature, there is a rela...

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Application Information

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IPC IPC(8): G01N30/88
Inventor 孟莹
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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