A Method for Detecting Antioxidant Content in Transformer Oil Using Tafel Diagram

Abstract

The invention discloses a method for detecting antioxidant content in transformer oil by using Tafel diagram. The method is to ultrasonically dissolve transformer oil in a specific supporting electrolyte, use a graphite electrode with a diameter of 6 mm as a working electrode, and use an electrochemical workstation to The content of T501 antioxidant in transformer oil was measured by using Tafel diagram. Based on the fact that the peak current of the characteristic peak of T501 antioxidant is proportional to its concentration in transformer oil, a method for detecting transformer oil by using Tafel diagram was established. Methods for the antioxidant content of T501. Compared with the prior art, the invention has simple operation, low cost, rapid measurement and high accuracy, and can realize on-site analysis of samples.

Description

technical field [0001] The invention belongs to the technical field of chemical detection. Specifically, the invention relates to a method for detecting the content of T501 antioxidant in transformer oil by using a Tafel diagram. Background technique [0002] In order to effectively complete the various functions of transformer oil, the transformer oil itself must have good chemical, physical and electrical properties. Transformer oil is inevitably oxidized during operation, producing a large amount of peroxides and oxidation products such as alcohols, aldehydes, ketones, acids, etc. These oxidation products are very harmful to the safe operation of power system equipment. [0003] Transformer oil is added with T501 antioxidant before leaving the factory to improve the oxidation stability of the oil. However, excessive antioxidants will affect the electrical properties of the oil. At the same time, due to factors such as the operation of the purifier and the aging products ...

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Problems solved by technology

[0004] At present, the commonly used methods for detecting the content of T501 antioxidant in transformer oil include spectrophotometry, liquid chromatography and infrared spectroscopy, but each method has great defects: spectrophotometry, sample pretreatment is complicated, and the used There are many instruments and medicines, and the repeatability is poor; liquid chromatography and infrared spectroscopy are relatively accurate in detection, but the instruments and equipment are very expensive, and the measurement time is long, which is not conducive to the large-scale promotion of the method

[0005] Obviously, there is still no relatively mature and simple method for the determination of T501 antioxidant content in transformer oil

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