Prof. Hasan Komurcugil

Senior Member, IEEE

Eastern Mediterranean University
North Cyprus, Turkey

Hasan.Komurcugil@emu.edu.tr

Title: Sliding Mode Control and Its Applications in Power Converters

Abstract:

In the last decades, the sliding mode control (SMC) method has gained popularity in many areas such as robotics, aerial vehicles, power electronics, and electrical drives. This popularity comes from the distinguished features of the SMC which include fast dynamic response, insensitivity to parameter variations and disturbances, order reduction, and implementation simplicity. This presentation is limited to the sliding mode control of various power converters whose structure is subject to variations due to the switches and diodes. This implies that the position of the switches is always changed by the pulse width modulation (PWM) signals. Therefore, the fundamental operating principle of SMC developed for a specific power converter is usually based on altering the dynamics of the power converter by applying a discontinuous control input that forces the error variables to slide along the predetermined surface called the sliding surface. Despite of these attractive features, the SMC method suffers from chattering (i.e.: zigzag movements on the sliding surface) resulting in low control accuracy and losses in the power converters.
Firstly, the fundamentals of SMC theory for controlling power converters are explained briefly. Then, the design of continuous-time SMC (the sliding surface function design, sliding coefficient selection, control input selection, chattering reduction, and modulation technique) is presented. Thereafter, the SMC of various power converters (DC-DC buck converter, grid-connected inverter, UPS inverter, dynamic voltage restorer, and rectifier are presented with simulation as well as experimentally verified results. Finally, some conclusions are derived.

Biography:

Hasan Komurcugil received a Ph.D. degree in 1998 from the Eastern Mediterranean University, North Cyprus, Turkey, in electrical engineering.

He is currently a full-time Professor at the Eastern Mediterranean University. From 2004 to 2010, he was the Head of the Computer Engineering Department. In 2010, he played an active role in preparing the department's first self-study report for the use of the Accreditation Board for Engineering and Technology. In 2010, he was elected as the Board Member of the Higher Education, Planning, Evaluation, Accreditation and Coordination Council in North Cyprus. From 2010 to 2019, he played an active role in evaluating the universities in North Cyprus. In 2022, he visited the Electrical and Computer Engineering Program of Texas A&M University in Qatar as an Associate Research Scientist. His research interests include power electronics and innovative control methods for power converters such as sliding mode control, Lyapunov-based control, and model predictive control. He is a co-author of two books and one book chapter.

He has over 75 journal publications which include more than 40 IEEE Transactions. He was the recipient of the best presentation recognitions at the 41st and 42nd annual conferences of the IEEE Industrial Electronics Society (IECON) in 2015 and 2016, respectively. He is a Senior Member of the IEEE and a member of the IEEE Industrial Electronics Society (IES). Also, he is the Chair of the Renewable Energy Systems Subcommittee of the Power Electronics Technical Committee of IES and a member of two major committees (Awards and Honor Committee and Publications Committee) of IES.
He served as the Corresponding Guest Associate Editor of the IEEE TRANSACTIONS ON ENERGY CONVERSION and Guest Editor of the IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS. Currently, he serves as the Associate Editor of the IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS and the IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS.

Prof. Mohamed Benbouzid

IEEE Fellow

University of Brest
UMR CNRS 6027 IRDL – Institut de Recherche Dupuy de Lôme, Brest, France

Mohamed.Benbouzid@univ-brest.fr

Title: Exploring the Future of Tidal Stream Turbine Drivetrains: A Journey into Technology Options

Abstract:

Tidal stream energy is one of the promising solutions to lower CO₂ emissions. It is sustainable and predictable. Tidal current oscillations are highly predictable, unlike other types of energy. Tidal stream energy is usually harnessed using horizontal-axis tidal turbines, which are analogous to wind turbines. However, the maximum power extracted from a tidal turbine is 61% higher than a wind turbine of the same input power because of the higher density of water over air. Tidal stream turbines are submerged systems so they have to withstand high loading and harsh submerged conditions. Furthermore, many challenges have to be overcome to improve their reliability, and availability, and decrease maintenance costs. In particular, the turbine drivetrain and generator option choices affect the availability as well as the cost of energy.

In this challenging context, this keynote will address the critical issue of tidal stream turbine drivetrain options, while proposing trends and discussing potential and promising topology options.

Biography:

Mohamed Benbouzid received a Ph.D. degree in electrical and computer engineering from the National Polytechnic Institute of Grenoble, Grenoble, France, in 1994, and the Habilitation à Diriger des Recherches degree from the University of Amiens, Amiens, France, in 2000.

After receiving the Ph.D. degree, he joined the University of Amiens, Amiens, France where he was an Associate Professor of electrical and computer engineering. Since September 2004, he has been with the University of Brest, Brest, France, where he is a Full Professor of electrical engineering. Prof. Benbouzid is also a Distinguished Professor and a 1000 Talent Expert at the Shanghai Maritime University, Shanghai, China. His main research interests and experience include analysis, design, and control of electric machines, variable-speed drives for traction, propulsion, and renewable energy applications, and fault diagnosis of electric machines.

Prof. Benbouzid has been elevated as an IEEE Fellow for his contributions to the diagnosis and fault-tolerant control of electric machines and drives. He is also a Fellow of the IET. He is the Editor-in-Chief of the INTERNATIONAL JOURNAL ON ENERGY CONVERSION and the APPLIED SCIENCES (MDPI) Section on Electrical, Electronics and Communications Engineering. He is a Deputy Editor for the IET RENEWABLE POWER GENERATION.