Performance Comparison of a DC–DC Boost Converter With Conventional and Non-linear SMC Controller in Dual Loop Structure

Abstract

Generally, the control system confronts various control techniques in the dual-loop control concept. Most of the studies deal with two different controllers in their loops, which increases the problem of designing two distinct procedures with lengthened calculations. In this article, different control techniques like conventional proportional integral (PI), proportional integral derivative (PID), and nonlinear sliding mode control (SMC) have been discussed, and the implementation of SMC in the Dual loop control of a DC–DC Boost converter is presented. The converter’s dynamic behavior is observed by driving their analytical equations. The effective controller for the proposed converter is ascertained by their comparative analysis. The proposed concept is validated with MATLAB/Simulink and a hardware prototype. The controller’s response is compared for various disturbances. Here, dual-loop SMC is put forward in both loops and its competence is confirmed with a minimal settling period of 0.005 sec and a percentage overshoot of 0.2% during the startup conditions, whereas during the line disturbances a minimum peak time of 0.0001 sec is achieved with a settling time of 0.025 sec. Additionally, a nil percentage overshoot and a settling time of 0.02 sec with a 0.001 sec peak time are attained during the load variations. Furthermore, a settling time of 0.01 sec and a percentage overshoot of 0.8% is reached during the reference voltage variations. From the numerical analysis, it is contemplated that an appropriate selection of SMC controllers in both the outer and inner loop results in optimal performance of the converter during the closed loop operation. Finally, the SMC + SMC controller exhibits superior controlling action compared to PI + PI and PID + PID controllers.

Keywords:

• SMC controller
• PI controller
• dual-loop control
• boost converter
• DC–DC converter

AUTHORS’ CONTRIBUTIONS

All authors contributed equally to this work.

DISCLOSURE STATEMENT

Conflict of interest is not applicable in this work.

DATA AVAILABILITY STATEMENT

Data sharing does not apply to this article.

Additional information

Notes on contributors

Rekha Yoganathan

Rekha Yoganathan received her Graduate degree in Electrical and Electronics Engineering from Bharathidasan University, Tiruchirappalli in 2003 and a Master’s degree in Power Electronics and Drives from Anna University, Chennai in 2012. Currently, she is pursuing her Ph.D. degree at Anna University, Chennai. She has teaching experience of 9 years in various Engineering colleges. Her research interests include power electronic converters, non-linear controllers, renewable energy technologies, and optimization techniques. So far, she has published papers in 3 International Journals and presented papers at 4 International conferences and 5 National Conferences.

Jamuna Venkatesan

Jamuna Venkatesan is a Professor and Head of the Electrical and Electronics Engineering Department and student affairs of Jerusalem College of Engineering, Chennai, India. She received her B.E degree in Electrical and Electronics Engineering from St.Peters Engineering College, Chennai in 1999, her M.E degree in Power Electronics and Drives from Jerusalem College of Engineering, Chennai in 2005, and a Ph.D. from Anna University, Chennai in 2010. She has secured a fifth university rank in the P.G. degree. She has been working in the teaching field for about 22 years, including 16 years of research experience in the field of Drives, Power Converters, Multilevel inverters, and Green energy systems. She has published over 150 technical papers in national and international conference proceedings/journals. She is a life member of the Indian Society for Technical Education, Institution of Engineers, Institution of Electronics and Telecommunication Engineers, and International Association of Engineers.

T.V. Narmadha

T.V. Narmadha is a professor in the Department of Electrical and Electronics Engineering, St. Joseph’s College of Engineering, Chennai, India. She obtained her AMIE (ECE), AMIE (Electrical) from the Institution of Engineers, India, and M.E and Ph.D. degrees from the College of Engineering, Anna University, Chennai. She has more than 22 years of teaching experience. She has published more than 35 research papers in national/international journals/conference proceedings. Her teaching and research interests include electrical drives, auto-tuning, control algorithms, and optimization techniques. She is an associate member of IE (I).

I. William Christopher

I. William Christopher received his AMIE degree in Electronics and Communication Engineering from The Institution of Engineers (India), Kolkata in 2001, M.E degree in Power Electronics and Drives Engineering from Anna University, Chennai in 2005, and Ph.D. from Faculty of Electrical Engineering, College of Engineering Guindy, Anna University, Chennai in 2014. He is currently working as an Associate Professor in the Department of Electrical and Electronics Engineering, Loyola-ICAM College of Engineering & Technology (LICET), Chennai and he has teaching experience of 17 Years and 2 Years of Industrial experience. He is a recipient of the IET (UK) YPS Young Teacher Award from the IET(UK) Chennai Network for his contribution toward the profession and IET. He has to his credit of publishing 52 research papers in reputed international journals and in various international and national conferences. He is a guest reviewer for a few reputed Journals. He is a member of several Professional societies like IE(India), IETE, ISTE, and IAENG.His research interests are power converter topologies, renewable energy systems, e-mobility, and smart grid.