Abstract
Transformer oil is widely used in power oil-filled electrical equipment, which is an insulating and diagnostic medium. During the operation of power transformers, its operational and dielectric properties deteriorate. To increase the operating time of transformer oil, it is inhibited by an antioxidant additive, which is most often used as ionol and the ionol concentration must be constantly monitored. This control is carried out by chromatographic methods. The main problem of controlling the antioxidant additive in transformer oil is its extraction with organic extractants, which are ethyl alcohol, which contains water, which has a negative effect on the extraction process. Thus, a search for more effective extractants for the extraction of ionol from transformer oil was undertaken. The retention characteristics of individual organic extractants and antioxidant additives were determined by the method of high-performance gas-liquid chromatography using a quartz capillary column and an automated system for dosing a sample into the chromatograph under various experimental conditions. Both the isothermal mode of the experiment and under linear programming conditions of the chromatographic column have been used. The dependence of the retention characteristics of organic extractants and ionol on the temperature of analysis was established, which has a linear form.
Highlights
To extend the service life of transformer oil, an antioxidant additive is introduced into it, which is most often used as 2.6-di-tertiary butyl vapor - cresol under the brand name “Ionol”
The mechanism of action of this additive lies in its ability to interact with active radicals, which are formed as a result of a chain reaction of oxidation of transformer oil
An antioxidant additive is added to transformer oil at the manufacturing stage
Summary
To extend the service life of transformer oil, an antioxidant additive is introduced into it, which is most often used as 2.6-di-tertiary butyl vapor - cresol under the brand name “Ionol”. The mechanism of action of this additive lies in its ability to interact with active radicals, which are formed as a result of a chain reaction of oxidation of transformer oil. In this case, a more stable molecule is formed, which is less susceptible to the oxidation process [1,2,3]. Oxidation of transformer oil leads to accelerated destruction of paper insulation, which is associated with the weakening of glucose bonds. The process of decomposition of organic substances contained in transformer oil [11,12]
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