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This webinar is being sponsored by the IEEE Power Electronics Society Technical Committee on Sustainable Energy Systems
Wednesday, 27 January 2021 11:00 AM ET
Presenters: Juan Carlos Balda & Yue Zhao, University of Arkansas, USA
Abstract: Distributed generation is becoming more prevalent in electric power distribution systems as costs are reaching grid parity, in particular for solar generation. At the same time, the need for energy storage is becoming more important since peak generations very often do not coincide with peak demands. Therefore, developing grid interfaces based on power electronics that combine solar generation and energy storage is of interest. In this webinar, a case study will be presented on the design and validation of an all silicon carbide (SiC) 150-kW triple-active-bridge (TAB) converter stage for combined integration of solar array and energy storage. The detailed design methodology used for power electronics building blocks (e.g., the H-bridge converters and active-neutral-point-clamped (ANPC) using 1.7kV SiC modules), and the 20-kHz three-port transformer will be presented together with experimental results on the built prototype. In addition, a design case study of a 4.16kV grid-tied inverter using the TAB converters will be presented.
Biography: Juan Carlos Balda (IEEE M'78 SM'94) received his B.Sc. in Electrical Engineering from the Universidad Nacional del Sur (Bahía Blanca, Argentina) in 1979, and his Ph.D. degree in Electrical Engineering from the University of Natal (Durban, South Africa) in 1986. He was first employed as a researcher and a part-time lecturer at the University of Natal until July 1987. He spent two years as a visiting Assistant Professor at Clemson University, South Carolina. He has been at the University of Arkansas at Fayetteville since July 1989 where he is currently a University Professor, Department Head, associate director for applications of the National Center for Reliable Electric Power Transmission (NCREPT) and campus director for the NSF IUCRC Grid-connected Advanced Power Electronic Systems (GRAPES). His main research interests are Power Electronics, Electric Power Distribution Systems, Motor Drives and Electric Power Quality. He is a senior member of the IEEE, member of the Power Electronics and Power & Energy Societies, and the honor societies Eta Kappa Nu and Tau Beta Pi. He is also a vice-chair of IEEE PELS TC5 committee and faculty advisor to the local chapter of the IEEE Power Electronics Society.
Biography: Yue Zhao (S’10 - M’14 - SM’20) received a Ph.D. degree in electrical engineering from the University of Nebraska-Lincoln, Lincoln, USA, in 2014. He was an Assistant Professor in the Department of Electrical and Computer Engineering at the Virginia Commonwealth University, Richmond, USA, in 2014-2015. Since 2015, he has been with the University of Arkansas (UA), Fayetteville, USA, where he is currently an Assistant Professor in the Department of Electrical Engineering. His current research interests include electric machines and drives, power electronics, and renewable energy systems. He has 4 U.S. patents granted and co-authored more than 80 papers in refereed journals and international conference proceedings. Dr. Zhao is an Associated Editor of the IEEE Transactions on Industry Applications and IEEE Open Journal of Power Electronics. He was a recipient of 2018 U.S. National Science Foundation CAREER Award, the 2020 IEEE Industry Applications Society Andrew W. Smith Outstanding Young Member Achievement Award and the 2020 UA College of Engineering Dean’s Award of Excellence.
This webinar is being sponsored by the IEEE Power Electronics Society History Committee
Tuesday, 9 February 2021 11:00 AM ET
Presenter: W. Bernard Carlson, University of Virginia/National University of Ireland Galway
Abstract: In 1887, Nikola Tesla perfected his polyphase motor by using two out-of-phase alternating currents to create a rotating magnetic field in the stator. Initially, he delivered these two currents separately by using four wires to connect his motor to the generator. However, Tesla and his backers quickly realized that there would be little demand for an AC motor requiring four [or even more] wires; could he develop a polyphase motor that would run on existing two-wire networks? In response, Tesla figured out how to use resistors, capacitors, and inductance coils to split a single alternating current coming into his motor into several out-of-phase currents. In this webinar, we will explore how Tesla solved this intricate problem and discuss whether his introduction of these electronic components represents one of the first examples of power electronics.
Biography: Bernie Carlson is the Vaughan Professor of Humanities and Chair of the Department of Engineering and Society at the University of Virginia as well as a lecturer in the TechInnovate program at the National University of Ireland Galway.
Bernie studied history and physics as an undergraduate at Holy Cross College, earned his Ph.D. in the history and sociology of science at the University of Pennsylvania, and did his postdoctoral work at the Harvard Business School. He has written widely on the innovation process as well as on the role of technology in the rise and fall of civilizations. His books include Innovation as a Social Process: Elihu Thomson and the Rise of General Electric, 1870-1900 (Cambridge University Press, 1991) and Technology in World History, 7 volumes (Oxford University Press, 2005). His most recent book, Tesla: Inventor of the Electrical Age. (Princeton University Press, 2013) has been translated into nine languages. In 2015, Bernie won both the Sally Hacker Prize from the Society for the History of Technology as well as the IEEE’s Middleton Award in Electrical History. In addition to his books, Bernie has filmed 36 lectures on "Understanding the Inventions that Changed the World" for The Great Courses.
Bernie has advised a variety of organizations on the culture of innovation, and for over a decade, consulted with Corning Incorporated. He has served on the editorial board of IEEE Spectrum as well as on the IEEE History Committee.
This webinar is being sponsored by the IEEE Power Electronics Society DMC
Thursday, 25 February 2021 11:00 AM ET
Presenter: Ralph M. Burkart, ABB Corporate Research, Switzerland
Abstract: Optimized product performance, low R&D costs and short time to market are important prerequisites for an industrial company to be competitive. In this respect, the availability of powerful, versatile and easy to use design tools is typically a key enabler. This webinar talk presents the example of the introduction of a state-of-the-art tool for automated design and optimization of power electronic converters in the R&D units of Hitachi ABB Powergrids. In the first part, the talk will present the main principles and technical features of the design tool. Important aspects like the workflow, the available optimization variables and parameters as well as the search algorithm will be covered. The second part of the talk focuses on the practical aspects of the introduction and dissemination of the design tool. The challenges of empowerment and motivation that are key ingredients to establish a sustainable and broad user base will be addressed. A palette of organizational and technical measures will be presented that helped us to overcome these challenges and successfully establish the tool.
Biography: Ralph M. Burkart (S’11-M’16) received the M.Sc. and Ph.D. degrees in electrical engineering from ETH Zurich, Switzerland, in 2011 and 2016, respectively.
During his Ph.D. studies at the Power Electronic Systems Laboratory, ETH Zurich, he was working on advanced multi-objective optimization techniques and multi-physics modeling of components for comparative benchmarking of power electronic converter systems. His research interests included in particular the analysis of WBG semiconductors and different converter modulation schemes on the system-level converter performance as well as the accurate modeling of magnetic components.
In 2016, Dr. Burkart joined the ABB Corporate Research Center in Baden-Dättwil, Switzerland. He was working on the design and optimization of Si and SiC MV converters for PV and drives applications, both as a researcher and as project leader. Since November 2019, Dr. Burkart is with Hitachi ABB Powergrids Research in Baden-Dättwil where he leads a research team working in the areas of EMC design, medium frequency transformers and gas circuit breakers.
Opportunities and Challenges of Multiwinding Transformer-Based DC-DC Converters
This webinar is being sponsored by the IEEE Power Electronics Society Technical Committee on Control and Modeling of Power Electronics
Tuesday, 9 March 2021 11:00 AM ET
Presenter: Marco Liserre, Christian-Albrechts-Universitat zu Kiel, Germany
Abstract: Multiwinding-Transformer-based (MWT) DC/DC converter did emerge in the last 25 years as an interesting possibility to connect several energy systems and/or to offer higher power density because of the reduction of transformer core material and reduction of power converter stages. MWT DC/DC converters can be considered as an interesting compromise between non-modular DC/DC Converter and a modular DC/DC converter since they are themselves modular in the construction. This eventually lead to some fault tolerant possibilities because the MWT connects more ports and if one of them is not working anymore and it can be isolated still the others can continue operating. Unfortunately, it is exactly the MWT which create most of the technical challenges of this class of DC/DC converters because of the cross-coupling effects which make especially the resonant-topology very challenging to be designed. This webinar will review the history of the MWT DC/DC and then provide a classification of them, comparing them with Figure of Merits and focusing on which is the maximum possible number of windings and which are the most suited magnetic core types. The problems coming from cross-coupling and the possible fault tolerant operation are analyzed with the help of simulation and experimental results.
The Webinar has the following TOC
1. History of MWT DC/DC converters
2. Operation principle, potential and architecture classification
3. Comparative analysis of MWT DC/DC converters
4. Interconnection and operation modes of MWT DC/DC
5. Failure Analysis and Fault Tolerant Capability of MWT DC/DC
6. Comparison of MWT DC/DC converters in relation to the application
Biography: Marco Liserre (S'00-M'02-SM'07-F´13) received the MSc and PhD degree in Electrical Engineering from the Bari Polytechnic, respectively in 1998 and 2002. He has been Associate Professor at Bari Polytechnic and from 2012 Professor in reliable power electronics at Aalborg University (Denmark). From 2013 he is Full Professor and he holds the Chair of Power Electronics at Kiel University (Germany). He has published 500 technical papers (1/3 of them in international peer-reviewed journals) and a book. These works have received more than 35000 citations. Marco Liserre is listed in ISI Thomson report “The world’s most influential scientific minds” from 2014.
He has been awarded with an ERC Consolidator Grant for the project “The Highly Efficient And Reliable smart Transformer (HEART), a new Heart for the Electric Distribution System”.
He is member of IAS, PELS, PES and IES. He has been serving all these societies in different capacities. He has received the IES 2009 Early Career Award, the IES 2011 Anthony J. Hornfeck Service Award, the 2014 Dr. Bimal Bose Energy Systems Award, the 2011 Industrial Electronics Magazine best paper award and the Third Prize paper award by the Industrial Power Converter Committee at ECCE 2012 & 2017 IEEE PELS Sustainable Energy Systems Technical Achievement Award and the 2018 IEEE-IES Mittelmann Achievement Award.
This webinar is being sponsored by the IEEE Power Electronics Society Young Professionals
Wednesday, 17 March 2021 9:00 AM ET
Presenter: Katherine A. Kim, National Taiwan University, Taiwan
Abstract: As a result of the coronavirus pandemic, the move toward online education has been accelerated and many educators find themselves moving their lectures to online videos. Developing educational videos can be daunting and challenging, but there are also benefits to both educators and learners. I have been developing lecture videos on power electronics and control for flipped-learning teaching since 2014 and sharing them publicly on YouTube. Along the way, there have been many lessons learned from both personal experience and feedback from students/viewers. This webinar will share best practices for recording equipment, editing software, video making tips, video format, and video/course hosting platforms. Study results that examine the effect of self-made and professional videos on student learning will also be shared, along with feedback from students and viewers from around the world.
Biography: Prof. Katherine A. Kim received the B.S. degree in Electrical and Computer Engineering (ECE) from the Franklin W. Olin College of Engineering in 2007. She received the M.S. degree and Ph.D. degrees in ECE from the University of Illinois at Urbana-Champaign in 2011 and 2014, respectively. She was an Assistant Professor of ECE at Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea, from 2014-2018. Since 2019, she has been an Associate Professor of Electrical Engineering at National Taiwan University, Taipei, Taiwan. She received the Outstanding Teaching Award from UNIST in 2015, the Richard M. Bass Outstanding Young Power Electronics Engineer Award from IEEE PELS in 2019, and recognition as an Innovator Under 35 for the Asia Pacific Region by the MIT Technology Review in 2020. For IEEE PELS, she served as the Student Membership Chair in 2013-2014, PELS Member-At-Large for 2016-2018, PELS Women in Engineering Chair in 2018-2020, and currently leads the PELS Educational Videos Committee.
This webinar is being sponsored by the IEEE Power Electronics Society Technical Committee on Control and Modeling of Power Electronics
Tuesday, 23 March 2021 11:00 AM ET
Presenter: Lennart Harnefors, ABB, Switzerland
Abstract: Achieving stability and good performance of a voltage-source converter (VSC) connected to a weak grid – that is, with a low short-circuit ratio (SCR) – is often challenging. Moreover, it is desirable to use the same controller tuning irrespective of the SCR. This is because the SCR may be varying, perhaps in an unknown way. This objective is called robust control – a well-studied topic in the field of process control. Roughly 15 years ago it was recognized that the conventional method vector current control (VCC) is not robust, as it generally gives unsatisfactory performance for weak grids. Due to the particular system structure, cut-and-dried methods from robust process control are not immediately applicable to converter control. Instead, the problem was circumvented by emulating the dynamics of a synchronous machine, called power-synchronization control (PSC). However, PSC was found to be inferior to VCC for strong grids, that is, neither PSC is robust. In this webinar, we present the key evolutionary steps in which VCC and PSC were robustified to both perform well irrespective of the SCR. The somewhat surprising end result of this process is that the two schemes become near identical and can be unified in a universal controller.
Biography: Lennart Harnefors received the M.Sc., Licentiate, and Ph.D. degrees in electrical engineering from the Royal Institute of Technology (KTH), Stockholm, Sweden, and the Docent (D.Sc.) degree in industrial automation from Lund University, Lund, Sweden, in 1993, 1995, 1997, and 2000, respectively. From 1994 to 2005, he was with Mälardalen University, Västerås, Sweden, from 2001 as a Professor of electrical engineering. From 2001 to 2005, he was, in addition, a part-time Visiting Professor of electrical drives with Chalmers University of Technology, Göteborg, Sweden. In 2005, he joined ABB, HVDC Product Group, Ludvika, Sweden, where, among other duties, he led the control development of the first generation of multilevel-converter HVDC Light. In 2012, he joined ABB, Corporate Research, Västerås, where he was appointed as a Senior Principal Scientist in 2013. He is, in addition, a part-time Adjunct Professor of power electronics with KTH. Dr. Harnefors is an IEEE Fellow. He is an Editor of the IEEE Journal of Emerging and Selected Topics in Power Electronics and an Associate Editor of IET Electric Power Applications. He was the recipient of the 2020 IEEE Modeling and Control Technical Achieved Award and was acknowledged as an outstanding reviewer of IEEE Transactions of Power Electronics in 2018. His research interests include control and dynamic analysis of power electronic systems, particularly grid-connected converters and ac drives.
Opportunities, Challenges and Potential Solutions in High-frequency SiC Motor Drives
This webinar is being sponsored by the IEEE Power Electronics Society Technical Committee on Electrical Machines, Drives and Automation
Thursday, 6 May 2021 10:00 AM ET - Please note the date of the webinar has changed from 24 February to 6 May.
Presenter: Xibo Yuan, University of Bristol, United Kingdom
Abstract: The fast-switching speed, higher voltage and higher temperature capabilities of SiC power devices have brought in clear opportunities in achieving high-density, higher-efficiency, higher-frequency and highly-integrated motor drives. This webinar will first provide an overview of the performance of state-of-the-art SiC devices and converters and their applications in motor drive area. Then, the issues due to high frequency switching and their impact on electric machines will be explained. For example, high dv/dt and high switching frequency can cause increased level of motor over-voltage, insulation and bearing degradation and electro-magnetic interference. Under the high dv/dt of SiC drives, motor terminals will see clear over-voltage with much shorter cables than that under Si IGBT motor drives and the voltage stress will mostly drop on the first several turns of the motor windings. How the switching speed and switching frequency will affect the winding insulation (e.g. partial discharge) and motor bearing current will be explained. Experimental test results with SiC motor drives will be given and the theory behind the experimental observations will be provided. Several potential solutions in addressing the above negative side-effects of high-frequency SiC drives will be discussed, including filters, waveform shaping through soft-switching and gate drive, alterative converter topologies, quasi-multilevel modulation, etc. A couple of SiC motor drive examples and research projects in this area will also be presented to further demonstrate the opportunities, challenges and potential solutions mentioned above.
Biography: Xibo Yuan (Senior Member, IEEE) received the Ph.D. degree from Tsinghua University in 2010. He has been a Professor since 2017 in the Electrical Energy Management Group, Department of Electrical and Electronic Engineering, University of Bristol, Bristol, U.K, where he became Lecturer, Senior Lecturer and Reader in 2011, 2015 and 2016, respectively. He also holds the Royal Academy of Engineering/Safran Chair in Advanced Aircraft Power Generation Systems. He is an executive committee member of the UK National Centre for Power Electronics and the IET Power Electronics, Machines and Drives (PEMD) network. His research interests include power electronics and motor drives, wind power generation, multilevel converters, application of wide-bandgap devices and more electric aircraft technologies. Professor Yuan is an Associate Editor of IEEE Transactions on Industry Applications and IEEE Journal of Emerging and Selected Topics in Power Electronics. He is a Fellow of IET and received The Isao Takahashi Power Electronics Award in 2018.
Adaptive EMC Design for Wide Bandgap Power Converters in Aviation Applications
This webinar is being jointly sponsored by the IEEE Power Electronics Society Technical Committee on Aerospace Power
Wednesday, 21 July 2021 9:00 AM ET
Presenter: Cong Li, GE Global Research Center, Niskayuna, NY
Abstract: This webinar provides engineers with techniques to develop and construct electromagnetically compatible Wide Bandgap (WBG) power electronic converters used in aviation applications. Real-world examples and issues are demonstrated with high-frequency construction methods necessary to meet the Electromagnetic Compatibility (EMC) requirements. The webinar provides fundamental EMC theory for SiC power electronics, a new “SOLVE” EMC design flow for WBG power converters, and practical design, construction, and measurement techniques.
Biography: Dr. Cong Li (S’09-M’15-SM’19) received the Ph.D. degree in electrical engineering specializing in power electronics from The Ohio State University, Columbus, OH, USA, in 2014.
He joined GE Global Research Center at Niskayuna, NY, USA as a Research Engineer in 2014 and is currently a Senior Power Electronics Engineer and EMC Lead. His research interests include power electronics topologies, Wide bandgap devices, high-density high power Silicon Carbide converters for automotive and aviation applications, and EMI mitigation techniques. He has authored more than dozens of technical papers, and patent applications in the area of power electronics and EMC. He is a voting member of commercial aviation DO-160 standard working group.
He is currently a Senior Member of IEEE, Associate Editor at IEEE Open Journal of Power Electronics and IEEE Transactions on Industry Applications. He is serving as secretary of IEEE-IAS-IPCSD-Power Electronics Devices & Components Committee (PEDCC), secretary of IEEE-EMCS-SC5 Power Electronics EMC, as well as Technicl Committee member of IEEE APEC, ECCE, ITEC conferences. He is a member of SAE and AIAA, and the recipient of the 2019 Promising Professional Award from the Society of Asian Scientists and Engineers (SASE).
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