Extending the Life of Transformer Units Through Maintenance Based on Insulation Revitalization

Globally, lately there has been the issue of efficient maintenance of equipment in energy systems through continuous monitoring and diagnosis. This paper presents a solution/ method that facilitates the achievement of an optimal maintenance for high power transformers, which leads to the prolongation of their life and implicitly to safe and reliable operation. Humidity is considered the biggest enemy of transformer insulation, starting from this premise, the authors have the advantages of using a method of dehumidification of oil-paper insulation with zeolite molecular sieves. The method was applied on transformers in operation, and the results obtained are positive, the use of the installation led to an increase in service life.