Plenary Sessions

Edison Roberto Cabral da Silva (Federal University of Paraíba, Brazil)

Plenary: Power electronics in Brazil: Evolution and Challenges

In this talk, 60 years of power electronics history in Brazil will reviewed: actors and first challenges. An attempt of exposing the main contributions and impact of Brazilian research at international level will be given. The situation of power electronics in Brazil nowadays will be described and  challenges addressed.


Edison Roberto Cabral da Silva received the B.S.E.E. degree from the Polytechnic School of Pernambuco, Recife, Brazil, in 1965, the M.S.E.E. degree from the University of Rio de Janeiro, Rio de Janeiro, Brazil, in 1968, and the Dr. Eng. degree from the University Paul Sabatier, Toulouse, France, in 1972. From 1967 to 2002, he was with the Department of Electrical Engineering, Federal University of Paraiba, Brazil, and where he currently collaborates as researcher. From 2002 to 2012, he was with the Department of Electrical Engineering, Federal University of Campina Grande (UFCG), Brazil, where he is Professor Emeritus. At UFCG, he was the Head of the Electrical Engineering Department, and the Coordinator of Graduate Courses. Also he was the Director of the Research Laboratory on Industrial Electronics and Machine Drives (LEIAM) for 30 years. He was Visiting Professor at the Federal University of Rio de Janeiro and at the Federal University of Paraiba, Brazil, and at the University of Wisconsin-Madison, USA. Dr. Silva was the General Chairman of the 1984 Joint Brazilian and Latin-American Conference on Automatic Control, sponsored by the Brazilian Society on Automation and Control (SBA), of the IEEE Power Electronics Specialists Conference (PESC) in 2005 and of the Brazilian Conference on Automatic Control in 2012 and 2018. He is a Past President of the SBA and also served as member of both IEEE IAS and PELS boards. He is currently the Chair of the IEEE Joint IAS, PES, PEL Nordeste 1 Chapter / Bahia Section. Dr. Silva is an IEEE Life Fellow and National Research and Development Council (CNPq) Senior Researcher. He was an IAS DL for 2006-2007 and PELS DL for 2008-2010, and is an IAS Regional Speaker since 2008. His research activities are mainly in the area of power electronics with application to renewable energy and drive systems. He has been particularly interested in multilevel structures and photovoltaic systems.

Maria Ines Valla (Universidad Nacional de La Plata, Argentina)
Finite state Model Predictive Control of Multilevel Converters

Plenary: Finite state Model Predictive Control of Multilevel Converters

The increase in penetration of alternative energies sources in a distributed generation scheme, have introduced new concepts in the electrical network. It is necessary to integrate different energy sources with different power levels as well as high variability of the power provided by each source. Behind these high‐profile research areas as Renewable Energy or Smart Grids, Power Electronics has been almost hidden, but it is the vital part of many essential systems. Different converters topologies are necessary to connect different power sources and storage elements. In Medium and High voltage Grids the use of multilevel converters is almost mandatory. In this kind of converters, a critical point is to obtain a perfect balance of the voltage on the capacitors which provide the different voltage levels. All this imposes new challenges to the control system in order to obtain the best performance of the converters, the energy sources and the loads. Then a multi objective control strategy, which can deal with external as well as internal variables, is desirable. The Finite State Model Predictive Control (FSMPC) is a particular case of the well‐known Model Based Predictive Control (MPC), which has been used for low dynamic, multivariable and nonlinear processes for a long time. The classical MPC, is an optimal control which predicts the future state of the plant with a horizon of several samples. In the case of the Finite State Predictive Control, the computational burden increases geometrically with the number of samples used in the prediction horizon, so the number of samples is reduced to 1, 2 or 3 samples. This kind of control is very well‐suited to be applied in the control of multilevel converters, since it deals with multi‐objective goals, as well as it can include any kind of limitations on the actuators signals. It is very simple to integrate the control of external variables such as current, voltages or power, together with the converter internal variables such as voltage balance within the DC bus capacitors. In this talk, the FSMPC is applied to two multilevel converters such Diode Clamped Multilevel converter (DCMC) and the Cascade Asymmetric Multilevel Converter (CAMC).


María Inés Valla (S’79-M’80-SM’97-F’10) received the Electronics Engineer and Doctor in Engineering degrees from the National University of La Plata (UNLP), La Plata, Argentina, in 1980 and 1994, respectively. She is currently a Full Professor with the Department of Electrical Engineering, Engineering Faculty, UNLP. She has the highest membership level at the National Research Council of Argentina (CONICET). She is engaged in teaching and research on Electric Drives, Power Converters, Power Quality and Renewable Energies. Dr. Valla has been Co-Editor in chief of the IEEE Transactions on Industrial Electronics (2013-2018), she is member of the IEEE Fellow Committee of the Power Electronics and the Industrial Electronics Societies, member of the IEEE Education Medal Committee. She is Distinguished Lecturer of the IEEE Industrial Electronics and the Industry Applications Societies. She is Life AdCom Member of the Industrial Electronics Society. She is also a member of the Buenos Aires Academy of Engineering in Argentina.

Paolo Mattavelli (University of Padova, Italy)
On recent control-oriented research issues in microgrids developed at the University of Padova

Plenary: On recent control-oriented research issues in microgrids developed at the University of Padova

The presentation will describe some recent control-oriented research issues in power-electronics based microgrids developed at the University of Padova. The presentation will cover topics related to dc, ac and hybrid microgrids, including optimal energy management, seamless transition, small-signal stability, self-tuning and stability monitoring, impedance synthesis using power electronics converters and the effect of high-performance current/voltage control. Examples will cover a set of different scenarios, including theoretical contributions, small lab-scaled microgrids, applications to unintentional islanding test benches, active loads, and renewable energy resources emulators. Finally, the experience of a microgrid in the Venice area will be also described.


Paolo Mattavelli received the Ph. D. degree in electrical engineering from the University of Padova (Italy) 1995. From 1995 to 2001, he was a researcher at the University of Padova. From 2001 to 2005 he was an associate professor the University of Udine, where he led the Power Electronics Laboratory. In 2005 he joined the University of Padova in Vicenza with the same duties. From 2010 to 2012 he was a professor and member of the Center for Power Electronics Systems (CPES) at Virginia Tech. He is currently (2017) a professor at the University of Padova, leading the Power Electronics Lab. in Vicenza. His major field of interest includes analysis, modeling and analog and digital control of power converters, grid-connected converters for renewable energy systems and micro-grids, high-temperature and high-power density power electronics. In these research fields, he has been leading several industrial and government projects. He has published more than 100 journal papers and more than 250 conference papers. His current google h-index is 57. From 2003 to 2012 he served as an Associate Editor for IEEE Transactions on Power Electronics. From 2005 to 2010 he was the IPCC (Industrial Power Converter Committee) Technical Review Chair for the IEEE Transactions on Industry Applications. For terms 2003-2006, 2006-2009 and 2013-2015 he has been a member-at-large of the IEEE Power Electronics Society’s Administrative Committee. He also received in 2005, 2006, 2011 and 2012 the Prize Paper Award in the IEEE Transactions on Power Electronics and in 2007, the 2nd Prize Paper Award at the IEEE Industry Application Annual Meeting. He is an IEEE Fellow.

Prasad Enjeti (Texas A&M University, EUA)
Integrated Solid State Transformer Concepts for Utility Interface of Power Conversion Systems

Plenary: Integrated Solid State Transformer Concepts for Utility Interface of Power Conversion Systems

In this presentation, integrated solid state transformer (SST) concepts for utility interface of adjustable speed drives, ac to dc fast chargers, renewable energy systems such as solar/wind and battery energy systems are detailed. Different configurations of the SST with medium frequency and high frequency transformer isolation are examined in detail. Advantages of the integrated SST concept include higher power density; higher input current quality and robust operation are detailed with extensive simulations. Results for laboratory prototype converter systems are discussed.


Prasad N. Enjeti (M'85-SM’88-F'00) received his B.E. degree from Osmania University, Hyderabad, India, in 1980, the M.Tech degree from Indian Institute of Technology, Kanpur, in 1982, and Ph.D. degree from Concordia University, Montreal, Canada, in 1988, all in Electrical Engineering. He has been a member of Texas A&M University faculty since 1988 and is widely acknowledged to be a distinguished teacher, scholar and researcher. He currently holds the Texas Instruments (TI) Professorship in Analog Engineering and serves as the Associate Dean for Academic Affairs in the College of Engineering. His research emphasis on industry-based issues, solved within an academic context, has attracted significant external funding. To date he has graduated 33 PhD and 51 MS students. Fourteen of his PhD students currently serve as faculty in institutions at home and across the world while others have leadership positions in industry. He along with his students have received numerous best paper awards from the IEEE Industry Applications and Power Electronics Society. His primary research interests are in advancing power electronic converter designs to address complex power management issues. His recent research focus has been on innovative power electronic solutions to interface renewable energy sources to electric utility. Among the many honors he has received are the Texas A&M University Association of Former Students University Level teaching award in 2001 and the R. David Middlebrook Technical Achievement Award from the IEEE Power Electronics Society in 2012.

Udaya Madawala (University of Auckland, New Zealand)
Grid Integration of EVs for V2G Applications: Wired or Wireless?

Plenary: Grid Integration of EVs for V2G Applications: Wired or Wireless?

Electric vehicles (EVs) improve air-quality, offer grid services through the vehicle-to-grid (V2G) concept and are ideal for sustainable living. As a result, they are becoming increasingly popular as the means of future transport. For V2G applications, EVs essentially require a bi-directional power interface with the electricity network (grid) to allow for both storing (charging) and retrieval (discharging) of energy, which can be achieved by either wired or wireless means. The latter, based primarily on Inductive Power Transfer (IPT) technology, is more attractive being convenient, safe, and ideal for both stationary and dynamic (while on the move) charging of EVs. This seminar presents trends and the latest advances in grid integration of EVs for V2G applications, highlighting the standards, challenges and future directions. Both wired and wireless technologies are discussed, focusing particularly on the bi-directional wireless power transfer (BD-WPT) technology developed for V2G applications.


Udaya K. Madawala graduated with a B.Sc. (Electrical Engineering) (Hons) degree from The University of Moratuwa, Sri Lanka in 1987, and received his PhD (Power Electronics) from The University of Auckland, New Zealand in 1993 as a Commonwealth Doctoral Scholar. At the completion of his PhD, he was employed by Fisher & Paykel Ltd, New Zealand, as a Research and Development Engineer to develop new technologies for motor drives. In 1997 he joined the Department of Electrical and Computer Engineering at The University of Auckland and, at present as a Full Professor, he focuses on a number of power electronics projects related to wireless grid integration of EVs for V2G applications and renewable energy. Udaya is a Fellow of the IEEE and a Distinguished Lecturer of the IEEE Power Electronic Society (PELS), and has over 30 years of both industry and research experience in the fields of power electronics and energy. He has served both the IEEE Power Electronics and Industrial Electronics Societies in numerous roles, relating to editorial, conference, technical committee and chapter activities. Currently, Udaya is an Associate Editor for IEEE Transactions on Power Electronics, and a member of both the Administrative Committee and Membership Development Committee of the IEEE Power Electronics Society. He was the General Chair of the 2nd IEEE Southern Power Electronics Conference (SPEC)- 2016, held in New Zealand, and is also the Chair of SPEC Steering Committee. Udaya, who has over 300 IEEE and IET journal and conference publications, holds a number of patents related to wireless power transfer (WPT) and power converters, and is a consultant to industry.