Coupled Electromagnetic-Thermal Model Applicable for Distribution Transformers

Abstract

Distribution transformers, with their specific passive cooling mechanism, are investigated in this research. FEM based approach was used for electromagnetic field distribution and losses calculation, following with the methodology for thermal modelling. Detailed temperature measurements using thermocouples and thermal camera were done on 1600 kVA unit, the results of which are compared against calculated values. The aim of this research is to present a viable approach for adequate thermal modelling of distribution transformers applicable for research and design purposes.