Measuring method for the furfural content of transformer oil

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...

AI Technical Summary

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 environment and the health of analysts, and long-term use of toluene will cause neurasthenia and hematopoietic system failure in operators. Symptoms of chronic poisoning such as changes

Images