He received the Graduate degree from Madurai Kamaraj University, Tamil Nadu, India in 1982, the Post-Graduate degree from Annamalai University, Annamalai Nagar, India in 1989 and the Ph.D. degree from CEG Anna University, Tamil Nadu, India in 2004 under QIP fellowship AICTE, India. He is the former head of the department and currently a Professor with the Department of Electrical Engineering, Faculty of Engineering and Technology, Annamalai University. He is having 33 years of experience to his credit as an educator and researcher. He has published more than 130 international journal and conference papers. International Journal Papers – 44, IEEE digital library – 36, International conference – 65, National conference – 9. According to Google scholar his citation is 1010, H index 16.  He was the outstanding reviewer for the Elsevier international journal of electric power and energy system 2015. He is an IEEE Madras Section Chairman, IEEE CIS Madras Chapter Chair and a Coordinator for more than 100 IEEE Madras Section organized FDP, Workshop, tech meet and TISP programs ect.. He was the recipient of the IEEE-NNS Outstanding Paper Travel Grant Award, Australia 2002, IEEE-WCCI Outstanding Paper Travel Grant Award, Canada 2016, the IEEE PES Student Program Award, USA 2003 and IEEE CIS Madras Chapter Best Chapter Award 2017. He was also a recipient of best researcher award, Annamalai University, 2018. His current research interests include power system operation and control, electricity price forecasting, EHV transmission fault diagnosis, FACTS devices, power system reliability, artificial intelligence techniques, micro grid, distributed generation and smart grid. Dr.Kumarappan is a Life Fellow of the Institution of Engineer’s (India) and a Life Member of the Indian Society of Technical Education. He was the recipient of the IEEE Madras Section Motivation Award in 2010 and the Certificate of Appreciation in 2012, third rank in the chapter activities 2015. He was the organizer of a special session in IEEE WCCI 2010 Spain, IEEE WCCI 2016 Canada and IEEE WCCI 2018 Brazil. He is a Speaker, Reviewer and Session Chair for IEEE/IET-U.K. international conferences and other international journals.