Raghu Selvaraj

Senior Research Scholar


Off: rs@wr.iitr.ac.in
Pers: raghu.selvaraj89@gmail.com

Educational Qualifications

  1. Doctor of Philosophy in Variable Speed Hydropower generating units,
    College, University:
    IIT Roorkee (India)

    Thesis Title Adopted: Investigation of Power and Control Redundancies in Large Asynchronous Hydro   Generating Units.
    Pursuing from July 2016
  2. Master of Technology in Power Electronics and Drives

    College, University: SRM University (Kattankulathur–Campus),
    Thesis: Space vector pulse-width (SVPWM) modulation for multilevel Inverter and solutions to modulation dependent problems
    June. 2010 to May. 2012

  3. Bachelor of Engineering in Electrical and Electronics Engineering
    College, University:
    Nandha Engineering College, Anna University
    Project Title:
    Improved Z-Source Inverter With Reduced Z-Source Capacitor Voltage Stress and Soft-Start Capability.
    June. 2006 to May. 2010                                                     

Raghu Selvaraj received the Bachelor degree in electrical engineering from Nandha Engineering College, India, in 2010 and the master’s degree in power electronics and drives from SRM University, Chennai, India in 2012. He is currently working toward the doctoral degree with the Power Electronics and Hydro-Electric Machines Laboratory, Department of Water Resource Development & Management, Indian Institute of Technology Roorkee, India.

From 2011 to 2016 he served as Teaching Faculty at Marwadi University, NIT Calicut and SRM University, India. His research interests include hydroelectric system, industrial drives, pulse-width modulation techniques, and fault-tolerant operation of drives. He has presented many research papers in various national and international conferences and journals.

  • Senior Research Fellow, IIT Roorkee, India, 08/2018 to Till Date
  • Junior Research Fellow, IIT Roorkee, India, 07/2016 to 07/2018
  • Assistant Professor, SRM University, India, 06/2014 to 06/2016
  • Ad hoc-teaching faculty, National Institute of Technology, Calicut, India, 12/2013 to 05/2014
  • Assistant Professor, Marwadi Education Foundation Group of Institutions, India, 06/2012 to 11/2013

Operation of 2-Level, Multilevel, Parallel connected converters and Z-source inverter, Different PWM techniques, Hybrid inverters, Coupled inductor inverters, PV and micro inverters. Speed control of induction motor, Doubly fed Induction motor, thermal behavior analysis of power converter, common mode voltage in medium drives, Front end capacitor balancing in Inverters, Harmonic analysis in the converter & Inverter, space vector PWM, Hysteresis current controller.

ORCID ID: 0000-0002-9034-2260
Refereed Journal Articles (SCI Published)

  1. K. Desingu, R. Selvaraj and T. R. R. Chelliah, “Control of Reactive Power for Stabilized Junction Temperature in Power Electronic Devices Serving to a 250 MW Asynchronous Hydro-Generating Unit,” in IEEE Transactions on Industry Applications. doi: 10.1109/TIA.2019.2933514.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8789401&isnumber=4957013
  2. K. Desingu, R. Selvaraj, T. R. Chelliah and D. Khare, “Effective Utilization of Parallel Connected Megawatt Three-Level Back-to-Back Power Converters in Variable Speed Pumped Storage Units,” in IEEE Transactions on Industry Applications. doi: 10.1109/TIA.2019.2936365.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8807249&isnumber=4957013
  3. R. R. Semwal, R. Selvaraj, K. Desingu, T. R. Chelliah and A. Joseph, “Two-Stage Protection Circuit for Multi-Channeled Power Electronic Converter Fed Large Asynchronous Hydro-Generating Unit,” in IEEE Transactions on Industry Applications. doi: 10.1109/TIA.2019.2931873.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8779666&isnumber=4957013
  4. A. Joseph, R. Selvaraj, T. R. Chelliah and S. V. A. Sarma, “Starting and Braking of a Large Variable Speed Hydrogenerating Unit Subjected to Converter and Sensor Faults,” in IEEE Transactions on Industry Applications, vol. 54, no. 4, pp. 3372-3382, July-Aug. 2018.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8318704&isnumber=8411799
  5. B. A. Kumar, R. Selvaraj, T. R. Chelliah and U. S. Ramesh, “Improved Fuel-Use Efficiency in Diesel–Electric Tugboats With an Asynchronous Power Generating Unit,” in IEEE Transactions on Transportation Electrification, vol. 5, no. 2, pp. 565-578, June 2019.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8672125&isnumber=8741042
  6. C. Bharatiraja, R. Selvaraj, T. R. Chelliah, J. L. Munda, M. Tariq and A. I. Maswood, “Design and Implementation of Fourth Arm for Elimination of Bearing Current in NPC-MLI-Fed Induction Motor Drive,” in IEEE Transactions on Industry Applications, vol. 54, no. 1, pp. 745-754, Jan.-Feb. 2018.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8059854&isnumber=8263327
  7. A. Joseph, T. R. Chelliah, R. Selvaraj and K. Lee, “Fault Diagnosis and Fault-Tolerant Control of Megawatt Power Electronic Converter-Fed Large Rated Asynchronous Hydro-Generator,” in IEEE Journal of Emerging and Selected Topics in Power Electronics. doi: 10.1109/JESTPE.2018.2881427.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8536388&isnumber=6507303
  8. R. R. Singh, R. Selvaraj, H. Mohan and T. R. Chelliah, “Dynamic Performance of Doubly Fed Hydroelectric Machines Under Voltage Unbalance—A Relative Electrothermomechanical Analysis,” in IEEE Transactions on Industry Applications, vol. 54, no. 5, pp. 4156-4166, Sept.-Oct. 2018.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8355601&isnumber=8467512
  9. R. Selvaraj, K. Desingu, T. R. Chelliah, D. Khare and C. Bharatiraja, “Fault Tolerant Operation of Parallel-Connected 3L-Neutral-Point Clamped Back-to-Back Converters Serving to Large Hydro-Generating Units,” in IEEE Transactions on Industry Applications, vol. 54, no. 5, pp. 5429-5443, Sept.-Oct. 2018.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8400490&isnumber=8467516 

In International conference

  1. K. Desingu, R. Selvaraj, T. R. Chelliah and D. Khare, “Effective Utilization of Parallel Connected Megawatt Three-Level Back-to-Back Power Converters in Variable Speed Pumped Storage Units,” 2018 IEEE Industry Applications Society Annual Meeting (IAS), Portland, OR, 2018, pp. 1-8.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8544656&isnumber=8544462
  2. K. Desingu, R. Selvaraj, T. R. Chelliah, D. Khare and L. P. Joshi, “Thermal Loading of Multi-Megawatt Medium-Voltage Power Converters Serving to Variable Speed Large Pumped Storage Units,” 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Chennai, India, 2018, pp. 1-6.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8707902&isnumber=8707440
  3. R. Selvaraj, T. R. Chelliah and D. Khare, “A novel switching strategy for DC link voltage balance in parallel connected three-level diode clamped back-to-back converter systems serving to variable speed pumped storage plant,” 2017 IEEE Transportation Electrification Conference (ITEC-India), Pune, 2017, pp. 1-6.
    URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8356957&isnumber=8333707
  1. Received Applied Power Electronics Student Travel grant of $1000 to attend the 35th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2020) to be held in New Orleans (USA) during 15-19th March 2020. 
  2. Received project grant of $1000 from Design Innovation Centre, IIT Roorkee to design and implement quasi ᴦ-source μ-inverter for plug and play PV module in 2018-2019.
  3. Presented an article in the title of “Design Challenges on Redundancy in Power and Control Circuit of Large Variable Speed Hydro Generating Unit” in International R&DConclave – Ministry of Power, India, February 2018.
  4. Received Ph.D fellowship from CPRI, India for pursuing Doctoral degree at IIT Roorkee. (CPR-949-WRC)
  5. Participated & Won cash prize of Rs. 3000 for the project entitled “Prepaid billing for electricity board using Microcontroller” in Hindustan University.
  6. Participated & Won First Prize in “Circuit Debugging”, Conducted by Hindustan University, Chennai.
  7. Designed and analyzed the impedance source inverter for induction motor drive applications in Kelvin appliances (As a part of undergraduate project)