Analysis of the influence of operating modes of a dry transformer on the condition of its insulation

RELEVANCE Numerical simulation of the isolation modes of dry transformers is relevant due to the need to improve the reliability and efficiency of modern power systems, as it allows to optimize their operational characteristics. In turn, modern software tools provide a detailed analysis of complex physical processes, which helps to reduce the cost of field experiments and improve the economic feasibility of the proposed solutions. Predicting the insulation life using numerical modeling and emergency prevention are critically important for maintaining the stability of the power supply. purpose. Development of a numerical model of a dry transformer. Conducting studies of the influence of various operating modes on the insulation condition of dry transformers. METHODS. To achieve this goal, the method of numerical simulation of the operation of dry transformers was used, implemented in the COMSOL Multiphysics software environment. results. The results of the study demonstrate the possibility of predicting thermal and electrical processes in the insulation of dry transformers based on modern numerical models, which helps to extend the service life of the latter. The existing operating modes of transformers make it possible to optimize their parameters to increase operational efficiency, including reducing electrical losses. The simulation results show the relationship between the parameters of the dry transformer operating modes and the state of its insulation, which contributes to the timely detection and elimination of possible malfunctions. conclusion. As a result of the study, based on the developed numerical model, the existing operating modes of a transformer with dry insulation were analyzed, and their effects were investigated taking into account the heating temperature of the transformer windings.