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Events at Department of Energy Technology

Guest lectures by Prof. Jorma Kyyrä and Dr. Alireza Nami


03.12.2019 kl. 10.00 - 12.00


There will be two guest lectures on December 3 prior to the PhD defence of Mohamed Alhasheem


Current Power Electronics Research Activities at Aalto University


Prof. Jorma Kyyrä, Aalto University, School of Electrical Engineering, Dept. of Electrical Engineering and Automation, Finland


10:00 -11:00


The presentation will give an overview on the research in power electronics (Prof. Kyyrä), electric drives (Prof. Hinkkanen) and renewable energies for power systems (Prof. Pouresmaeil).  Also, three more detailed topics are discussed. Disturbance-Observer-Based Integral Terminal Sliding Mode Controller for three-phase active converter shows that response to dynamic load changes is faster than with standard PI controller.  Second example discusses wireless charging of EVs based on a three-phase bidirectional converter, which is based on matrix converter. In the third case, the design and construction of a 5 kW aircraft auxiliary power supply with GaN-devices is presented.

About the lecturer

Prof. Jorma Kyyrä received M.Sc., Lic.Sc. and D.Sc. degrees from Helsinki University of Technology (TKK), Helsinki, Finland, in 1987, 1991, and 1995, respectively. He has worked at the university since 1985 in various positions Associate Professor of Power Electronics since 1996, Professor of Power Electronics since 1998, Dean of the Faculty of Electronics, Communications and Automation during 2008-2009, Vice President at Aalto during 2009-2011 and presently head of the department of electrical engineering and automation at Aalto.

His research interest is power electronics at large. Power electronics group at Aalto University has expertise e.g. in power electronics for ac drives, dc-dc converters, modeling of converters, filtering of EMI, power factor correction, distributed power systems and hybrid electric vehicles. He has been lecturing a full semester course on EMI, for many years.


Power Electronics for Future Power Grids: Drivers and Challenges


Dr. Alireza Nami, ABB Power Grids Research Center, Sweden


11:00 - 12:00


Currently, electric power systems start to shift toward more environment friendly energy productions to limit the climate change and reduce pollutions. The major focus is the variability of the new energy sources, and reliability of the supply. The challenge for the future electric power grids is how to integrate a widespread addition of renewable sources with intermittent nature in both transmission and distribution grids without compromising reliability, stability and cost of the service to the consumers. A system that can handle a generation mix with a high percentage of renewables will become a necessity which requires solutions as increased transmission capacity through AC and DC solutions, and/or a larger energy storage capacity in the grids. Grid-connected converter technologies have had a truly revolutionary impact on the way that electrical energy is delivered to consumers all over the world, and has become an indispensable part of the electric power systems today. It is anticipated that by 2030 all electric power generated utilizes power electronics somewhere between the point of generation and its end. Power electronics contribute in many ways to more efficient use of energy, which allows for energy savings, which in turn leads to reduced environmental impact. The R&D in this field aims at optimizing complex decisions and solutions that are required for the design of these power electronic converters to deliver innovation for the future conversion, processing, transmission, distribution as well as storage of energy across a wide range of applications.

This presentation will start with an overview of the main drivers for the future grids. Then the historical, the present and the future power grid will be discussed including the developments of power electronics in grid-connected applications such as HVDC and FACTS together with more futuristic applications. Moreover, the key design parameters of power electronics and its functionalities will be described in the context of megatrends and grand challenges of the electric power system evolution. Finally, the current state of the art and topics for the future research will be presented.

About the lecturer

Dr. Alireza Nami received his Ph.D. in Power Electronics from Queensland University of Technology, Australia, in 2010. From 2010 to 2011, he was a Postdoctoral Research Fellow in Global Center of Excellence, Kumamoto University, Japan. Since 2011, he has been with ABB Corporate Research Sweden and took several roles as a Principal Scientist in the area of high-power converter systems and control, R&D Project leader, and R&D manager for power electronics team. Currently, he is a Research Center manager for Power Grids Research in Vasteras, Sweden. ABB Power Grids Research in Sweden is a leading research groups in high-power grid connected products with extensive laboratory facilities including multi-megawatt testing capabilities enabling cutting edge research.

Dr. Nami has served several leading power electronics conferences as an invited speaker for industrial sessions and workshops, an instructor of tutorials, and a technical chair. He is author/co-author of number of conference and journal publications. He is inventor/co-inventor of several patent applications which have been adopted by the industry. He is an Associate Editor of the IEEE Transaction on Power Electronics, a member of Cigre working groups, and a member of the International Scientific Committee of the European Power Electronics and Drives Association.

THE guest lectures WILL TAKE PLACE in Pon 111 in room 1.177 and aLL are welcome


Department of Energy Technology


Pontoppidanstræde 111, auditorium 1.177