Investigation on the factors affecting inrush current of transformers based on finite element modelling

Abstract

A finite element model of a single phase transformer coupled with a voltage fed electric circuit is presented. The model can be used for various purposes. It is also capable to include the eddy-current effect in the core and/or in solid bars, if needed. A time-stepping finite element solution is used to study the influence of some major parameters on the inrush current level, including the primary winding distance from the core, the primary winding resistance, residual magnetic flux density in the core and its polarity. Simulation results showed a good agreement with corresponding test results.

Key Words:

• Inrush current
• transformers
• finite element method

Additional information

Notes on contributors

M R Feyzi

M Reza Feyzi

M Reza Feyzi received his BSc and MSc in 1975 from university of Tabriz in Iran with honours degree. He worked in the same university during 1975 to 1993. He started his PhD work in the University of Adelaide, Australia in 1993. Soon after his graduation, he rejoined to the University of Tabriz. Currently, he is an associate professor in the same university.

His research interests are finite element analysis, design and simulation of electrical machines and transformers.

M B B Sharifian

Mohammad Bagher Bannae Sharifian

MBB Sharifian was born in 1965 studied Electrical Power Engineering at the University of Tabriz, Tabriz, Iran. He received the BSc and MSc degrees in 1989 and 1992 respectively from University of Tabriz. In 1992 he joined the Electrical Engineering Department of the University of Tabriz as a lecturer. He received the PhD degree in Electrical Engineering from the same University in 2000. In 2000 he rejoined the Electrical Power Department of Faculty of Electrical and Computer Engineering of the same university as assistant professor. He is currently associate professor of the mentioned Department. His research interests are in the areas of design, modelling and analysis of electrical machines, transformers, and electric and hybrid electric vehicle drives.