Özet:

Before starting the design of the transformator, the knowledge of temperature distribution and thermal limits is of great importance for a proper design. The temperature above the permitted thermal limits can cause serious damage to the transformator components. In this study, a model for thermal field analysis was presented. Thus, the combination simulation software ANSYS@Maxwell and ANSYS@Mechanical, based on the combined electromechanical end-elements method (SEY) technology, based on all conditions from the heat that occurs in the active parts of the transformator to the temperature of the environment, and the thermal field analysis of a three-phase transformator has been carried out. A transformator with a nominal value of 15 MVA 33/11 kV is selected to verify the recommended model. The values obtained from the simulation have been verified by comparing the models and results with the experimental values. Thanks to the designed model, the temperature distribution occurring in the transformator's nucleus and shells and the temperature of the specific points in the areas where the transformator's temperature is not measured has been determined.

Anahtar Kelimeler:

Özet:

Before starting the transformer design, knowing the temperature distribution and the thermal limits are of great importance for a correct design. The temperature above the permissible thermal limits may cause serious damage to the transformer components. In this study, a model for thermal field analysis is presented. In this way, temperature distribution and thermal field analysis of a three-phase transformer were performed by ANSYS@Maxwell and ANSYS@Mechanical combination simulation software based on the combined electromechanical Finite Element Method (FEM) technique based on all conditions ranging from the heat occurring in the active parts of the transformer to the temperature of the environment. To verify the proposed model, a transformer with a nominal value of 15 MVA of 33/11 kV was selected. The values ​​obtained from the simulation were compared with the experimental values ​​and the models and results were confirmed. Thanks to the designed model, the temperature distribution in the core and the windings of the transformer and the temperature of the specific points in the undetectable areas of the transformer temperature were determined.