Reza Baghbani - Master of Science student in Electrical Engineering, Imam Hossein Comprehensive University
Reza Haghmaram - Associate Professor, Imam Hossein Comprehensive University

Power transformers, play a significant role in transmission and distribution substations. the temperature of the transformer's hottest point is a critical factor that affects its lifespan. The integration of low carbon technologies presents a technical challenge for distribution transformers because of their dynamic loading and potential overloading scenarios. to overcome this challenge and ensure safe operation, it is necessary to have a transformer dynamic thermal rating. the most cost-effective way to achieve this is by improving the accuracy of the dynamic thermal model, which relies on the top-oil temperature as a vital thermal parameter. Accurately predicting and determining the thermal response of the transformer's metallic parts is a crucial step in designing power transformers. The aim of this paper is to compare various proposed thermal modelsfor predicting the hot spot temperature and top oil temperature of power transformers.

Hot spot temperature, Top oil temperature, Power transformer, Thermal model