Analysis of thermal models to determine the loss of life of mineral oil immersed transformers

Mohammad Tolou Askari (Islamic Azad University)
Mohammad Javad Mohammadi (Islamic Azad University)
Jagadeesh Pasupuleti (Universiti Tenaga Nasional (UNITEN))
Mehrdad Tahmasebi (Islamic Azad University)
Shangari K. Raveendran (Universiti Tenaga Nasional (UNITEN))
Mohd Zainal Abdin Ab Kadir (Universiti Putra Malaysia)

Bulletin of Electrical Engineering and Informatics
Vol 10, No 5: October 2021

Hot spot as well as top oil temperatures have played the most effective parameters on the life of the electrical transformers. The prognostication of these factors is very vital for determining the residual life of the electrical transformers in the transmission and distribution systems. Thus, an accurate mathematical method is required to calculate the critical temperature such as hot spot and top oil temperature based on the different types of thermal models. In this study calculates the service life of the transformers based on an accurate top oil temperature. Accordingly, An approach solution is given for calculating the thermal model. Also, findings are validated with true temperatures. Finally, this method is implemented on 2500 KVA electrical transformer.