Ranjbar received the Master of Science and Doctor of Philosophy degrees in Electrical Engineering from University of Tehran in 1967 and Imperial College London in 1975, respectively with a thesis titled "Computer protection of high voltage transmission lines.".
Since then, he has been at Sharif University of Technology Department of Electrical Engineering, where he is currently a full professor Ranjbar is the Editor-in-Chief of the Journal of Electrical Science and Technology since 1989 and the Director of Niroo Research Institute since 1996 too. His main research interests are in the areas of electric power systems protection and operation, Electrical Machines and Smart Grids.
