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

Mohammad Tolou Askari, Mohammad Javad Mohammadi, Jagadeesh Pasupuleti, Mehrdad Tahmasebi, Shangari K. Raveendran, Mohd Zainal Abdin Ab Kadir


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.


Electrical transformer; Hot spot temperature; Numerical analysis; Thermal model

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Bulletin of Electrical Engineering and Informatics (BEEI)
ISSN: 2089-3191, e-ISSN: 2302-9285
This journal is published by the Institute of Advanced Engineering and Science (IAES) in collaboration with Universitas Ahmad Dahlan (UAD) and Intelektual Pustaka Media Utama (IPMU).