Method for detecting aging degree of insulation paper based on methanol content

Abstract

The invention provides a method for detecting the aging degree of insulation paper based on the methanol content. The method comprises the following steps of obtaining standard solutions with different methanol concentrations in transformer oil in different aging periods of the insulation paper; preparing a to-be-detected solution of methanol in the sample transformer oil; and judging the aging period of the insulation paper according to the to-be-detected solution of the methanol in the sample transformer oil and the standard solutions with different methanol concentrations in the transformeroil in different aging periods of the insulation paper. According to the invention, methanol in the transformer oil is detected for judging aging period of insulation paper, and the field detection of the methanol in the transformer oil is realized; the method is simple and convenient, and low in cost; a to-be-detected solution of methanol in sample transformer oil is compared with standard solutions of methanol in transformer oil in different aging periods of the insulation paper, so the aging stage of the transformer insulation paper can be rapidly and clearly judged, and the problems thatan existing insulation paper aging detection method is difficult to implement, has many influence factors, is low in detection precision and the like are effectively solved.

Description

technical field [0001] The present application relates to the technical field related to power system state evaluation, and in particular to a method for detecting the aging degree of insulating paper based on methanol content. Background technique [0002] Transformer is the core of energy conversion in the process of electric energy transmission and distribution, and is the most important and critical equipment in the safe operation of the power grid. It is of great practical significance to realize the detection of its solid insulation aging and insulation life. The operating cycle of transformers is generally 25 to 40 years. During the long-term operation of transformers, the faults caused by the deterioration of internal insulation account for the vast majority of transformer faults. Transformer internal insulation is a composite insulation system composed of insulating oil and insulating paper. The insulating paper directly determines the service life of the transforme...

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Problems solved by technology

[0005] This application provides a method for detecting the aging degree of insulating paper based on methanol content, which detects the methanol content in transformer oil, and judges the aging degree of insulating paper in transformer oil through the concentration of methanol in transformer oil, which effectively solves the current problem of detecting insulating paper. In the aging method, it is difficult to realize, there are many influencing factors, and the detection accuracy is low.

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