पूर्वोत्तर क्षेत्रीय विज्ञान एवं प्रौद्योगिकी संस्थान   
North Eastern Regional Institute of Science and Technology 
deemed-to-be-university under the Ministry of Education, Govt. of India
Nirjuli - 791109, Arunachal Pradesh 
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Dr. S. K. Bhagat


Reduced-Order Modelling & its application in Controller Design, Robust Control, Application of Control in Power Systems, H∞-Controller Design for Linear and Non-linear Systems, Control of Time-Delayed Stable/Unstable Systems, PID Controllers, Robust Control of Nonlinear Systems via Lyapunov Functions etc.

E-mail:skb[AT]nerist(dot)ac(dot)in, Phone(EPABX/Office): 0360-2257401-8 extn. 7003

  • Professional Background
  • Honors and Awards
  • Educational Details
  • Administrative Background
  • Memberships in Professional bodies
  • Teaching Engagements
  • Projects and Thesis Supervised/ Currently Supervising
  • Participation in short term courses
  • Books Authored
  • Publications in National/International Conferences:
Current  Designation To Type of Association Designation Date of Joining in  Organization
Professor 31/03/2015 Regular Lecturer 05/08/1991


From To Designation Organisation
31.03.2012 Till date Assoc. Professor  NERIST
31.03.2009 31.03.2012 Asstt. Professor -do-
05.08.1996 31.03.2009 Lecturer (Senior Scale) -do-
05.08.1991 05.08.1996 Lecturer -do-
Award Institute Year
National Merit Scholarship Holder from 1977 to 1984 Science College Patna (Patna University) 1977-79    
MIT Muzaffarpur (University of Bihar) 1979-84
Degree Subject University Year
Ph.D. Control Systems IIT Varanasi (erstwhile IT BHU) 2006
M. Tech. -do- University of Bihar, Muzaffarpur, Bihar 1991
B.Sc.(Engg.) Electrical Engineering Papers -do- 1984
From To Designation Organisation
Nov’2015 Cont. Electrical Engineer NERIST
July’ 2009 June’2012 Coordinator DoE Centre, NERIST -do-
Mar’2005 Sept’2005 Head of the Deptt. (EE) -do-
  1. ISTE (LM), IEEE
Title Course Code Module Semester
Basics of Electrical & Electronics Engineering ES-1200 BA II
Electrical Installation & Practice EE-2201 -do- II
Electrical Circuits EE-3201/EE-4401 DIP/ DE (Bridge) II
Fundamentals of Electrical Engineering EE-4121   I
Electromagnetic Fields EE-5104 DE I
Modern Control Engineering EE-6102 -do- I
Instrumentation & Process Control EE-6202 -do- II
Title of Project Names of Students
A) M. Tech. Dissertations Supervised
Tuning of PID Controller for Stable/Unstable Time-Delay Systems Ms. Mini Riba
Robust Control of Variable Speed Wind Turbine Ms. KirgamJini
Application of Model Order Reduction in Power Systems Mr. BinodRai
Voltage Stability Analysis using Lyapunov Energy Function Mr. Amresh Kumar
H-infinity Controller Design for Multi-Area Power Systems Mr. Satyam Rai
Robust Load Voltage Regulator Design using D-Statcom Ms. NilakshiKakati
Automatic Generation Control using LQR based PIController for Multi Area Interconnected Power System Ms. ChoklamNiji
B) B. Tech. Projects Guided
Design of Low Order Controller using MATLAB RamaniGogoi
Controller Design by Model Order Reduction via MATLAB Mintu Mandal &Sanat Kumar Paul
Low Order Controller Design using Model Reduction Technique Gitesh Das, GyatiOmo&Bonifide Rani
BimanHaloi&Prankrishna Das
Design of Robust Power System Stabilizer Y. Chandrakumar Singh &Anindya
Design of a PID Controller Bhattacharya
S. Sarkar &PrasanjitNath
Controller Design via Pole Placement TanujitSaha, Deep Chamuah, SubhrajitSaha&HirakJyoti Sinha
Controller Design via Reduced Order Modelling Nada Tangung, Yogendra Singh &NaniTangung
Robust Controller Design via Reduced Order Model-A Comparative Study
Course Name Sponsored By Date
Workshop on Engineering Optimization TEQIP Sponsored FDP One Week
May 14-18, 2012
  Soft Computing & Nano Technology in High Voltage Engineering AICTE Staff Development Programme Sept 17-28, 2012, Two Weeks 
Optical Techniques & Devices in Scientific & Engineering System Applications TEQIP Sponsored FDP One Week, Oct 28-1 Nov, 2013
Recent Advances in Signal Processing &Semiconductor Devices TEQIP Sponsored FDP One Week
Jan 24-29, 2014
Advances in Microprocessors, Microcontrollers & their Applications TEQIP Sponsored FDP Feb 17-21, 2015, One Week
Title Place Date
Model Reduction in Time-Domain & Frequency-Domain: An Overview (4-Lectures) NERIST 4-5 March’05
An Introduction to Robust Control (2-Lectures) -do- Oct 28-1st Nov, 2013
Publications (Total no. of Publications till date = 19 (7 (J) + 12 (C))); J = Journal, C = Conference
Publications in National/International Journals
1. Bhagat S. K., Rai B. and Kumar A., “GA based internal model ccontroller design for load frequency control in power system via reduced order model,” Int. J. Engg. Sci. Invention, vol. 3. no. 3, pp. 17-26, 2014.
2. Bhagat S. K., “BSPA based reduction algorithm for highly unstable systems,” Int. J. Electr. Electron. & Comp. Engg.,vol. 2, no. 2, pp. 1-6, December, 2013.
3. Bhagat S. K., “Balancing free reduction algorithm for singularly perturbed stable/unstable systems,” AMSE, Adv. in Mod.-C: Automat. Control (theory and applns.), vol. 67, no. 2, pp. 45-59, 2012, France.
4. Singh S. K.,Bhagat S. K., Nagar S. K. and Pal J., “Balanced realized reduced model for discrete-time non-minimal systems,” CSVTU Research J., India, vol.1, pp. 42-51, January, 2008.
5. Bhagat S. K. and Tewari J. P., “Reduced-order controller design using plant reduction technique,” AMSE, Adv. in Mod.-C: Automat. Control (theory and applns.), vol. 62, no. 3, pp. 21-35, 2007, France.
6. Bhagat S. K.,Tewari J. P. and Srinivasan T., “Some mixed methods for the simplification of high-order SISO systems,” J. of IE (India)-EL, vol. 85, pp. 120-123, September, 2004.
7. Tewari J. P. and Bhagat S. K., “Simplification of discrete-time system by improved Routh stability criterion via p-domain,” J. IE (India)-EL, vol. 84, pp. 189-192, March, 2004.
1. Kumar A. and Bhagat S. K., “A Comparative Study on Voltage Stability Analysisof Single Machine Infinite Bus System using Lyapunov Methods,” In Proc. IEEE Int. Conf. MICROCOM 2016, NIT Durgapur, India, 2016.
2. Bhagat S. K. , Kumar A. and Rai B., "Voltage statbility analysis using Lypanouv function obtained by Krasovskii’s method" In Proc. IEEE Int. Conf. ICPACE-2015, Bangalore, India, 2015.
3. Kumar A. and Bhagat S. K., “Voltage stability analysis using Lyapunov energy function,” In Proc., IEEE Conf., ICPDEN-2015, NERIST, Jan, 10-11, pp. 1-6, 2015.
4. Bhagat S. K., Rai B. and Kumar A., “Load frequency control in power systems via GA based IMC and model order reduction,” In Proc. IEEE Int. Conf. on Recent Adv. & Innov. in Engg., May, 9-11, Poornima University, Jaipur, India, 2014.
5. Bhagat S. K., “Robustness and fragility issues in control system design: A survey,” In Proc., Int. Conf. on Instr., Commun., Control & Automation, January, 3-5, 2013, KLU, Krishnankoil.
6. Bhagat S. K. andTewari J. P, “BFSR-SPA reduction algorithms for unstable systems,” In Proc., NCACAC-2009, pp. 1-8, Coimbatore, February, 7-8, 2009.
7. Bhagat S. K., S. K. Singh and Tewari J. P.,“Balancing free square root reduction algorithms for highly unstable/non-minimal systems,” In Proc., PPPPDSOC-2009, pp. 408-417, January, 23-24, 2009, Chandigarh, India.
8. BhagatS. K. andTewari J. P., “A new reduction method using dispersion analysis and least squares method,” In Proc., National Conf., TICE, Patiala, February, 5-6, 2004.
9. BhagatS. K., Tewari J. P. and Srinivasan T., “model/controller reduction using weighted recursive least squares estimates,” In Proc., National Conf., on Modelling and Simulation in Manufacturing, Annamalai Nagar, March, 15-16, 2003.
10. BhagatS. K., TewariJ. P. and SrinivasanT., “Least squares based model/controller reduction technique,” In Proc., Int. Symposium, PSEC, IIT Bombay, January, 3-4,  pp. 235-240, 2003.
11. BhagatS. K., TewariJ. P. and SrinivasanT., “A comparative study of conventional and identification based model reduction techniques,” In Proc., 26th National Syst. Conf., pp. 1-8, Hyderabad, India, Technical Session 4, November, 16-18, 2002.
12. Gupta D. K., Bhagat S. K. and J. P. Tewari, “A mixed method for the simplification of linear dynamic systems,” In Proc.,Int. Conf. CERA-01, IIT, Roorkee, February, 21-23, 2002.