Don Tan

Northrop Grumman Aerospace Systems, USA

Six Basic Characteristics of a Modern Grid

June 28, 9:20 am, Auditorium EL5
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Dong TanDr. Tan is Fellow and Power Products Manager with NGAS. He earned his Ph.D. from California Institute of Technology and is IEEE Fellow.

“A renowned world expert” in power electronics and energy systems, he is also known for his dual industry and academia careers as a chief technologist and a guest professor. He, together with his colleagues, has achieved many high-impact industry firsts with unparalleled performances, including resilient dc macro-grid, adiabatic power with record efficiency, highest precision pointing accuracy, lowest temperature cryogenic cooling for ultra low noise instrument, and highest beam quality in laser. He is a frequent keynote speaker and the principal author for more than 100 papers and presentations. His research has attracted more than $30M funding.

His recent recognitions include NGAS Engineering Choice Award for Innovation (2013, second place), NGAS Distinguished Engineer (2011), CIE USA Asian American Engineer of the Year Award (2010), AIAA Space System Award (2008), JANNAF Outstanding Achievement Award in Spacecraft Propulsion (2007), and NGST Distinguished Patent Award and President’s Award for Innovation (both in 2002). His double forward technology was licensed to a major telecommunications company.

He has been providing many IEEE and PELS leadership and services, including Member of the IEEE Board of Directors (2017 – 2018), Division II Director-Elect (2016), PELS Nomination Committee Chair (2015 – 2016), EiC (founding) of IEEE Journal of Emerging and Selected Topics in Power Electronics (2013 – present), PELS President (2013 – 2014), PELS Vice President for Operations (2009 – 2012), Guest EiC, IEEE Transactions on Power Electronics (2011), Guest EiC IEEE Transactions on Industry Applications (2012), Member of IEE PELS Fellow Committee (2010 – 2013), PELS AdCom Member at Large (2005 – 2009), PELS Vice President for Meetings (2001 – 2004), and Associated Editor for IEEE Transactions on power Electronics (1996-2000)

Abstract: Grid modernization requires a win-win-win approach for the environment, consumers, and grid owners. Electronictization will provide a foundation for active control and intelligence. The grid will have fractal architecture in order to be infinitely expandable. Structured microgrids will naturally integrate the renewables with storage to provide autonomous energy balance and control. Grid’s ability for fault isolation localizes any failure to minimize its impact. Built-in fault and redundancy management can enable self resiliency – to autonomously recover from natural or man-made disasters. And the back-to-back dc-dc will enable asynchronous generation to significantly enhance grid robustness while reducing grid operational cost.

Mohamed Belkhayat

Huntington Ingalls Industries, USA

Efficiency, Control, and Stability of Power Electronic Based Systems

June 28, 10:20 am, Auditorium EL5

Mohamed BelkhayatDr. Mohamed Belkhayat is currently a principal scientist with Huntington Ingalls Industries serving as a power and energy subject matter expert. He has been working in the field for over 25 years. He obtained his EE and Energy Systems Ph. D. from Purdue University in 1997. Dr. Belkhayat developed novel stability criteria and analysis techniques that have been actively studied and utilized in the power electronics research community and industry. He also holds several patents in the field and has published numerous papers on the stability of integrated DC and AC power systems. His research spans a wide range of energy sources, including nuclear, hydrocarbon, wind, solar, and sea waves. He also researched various conversion processes including thermo-photovoltaics, high voltage power electronics, and rotating machinery. He developed models for advanced multiphase rotating machinery as well as static multilevel power converters. Dr. Belkhayat also taught for over six years, energy conversion, controls, and modeling and simulation of power electronics systems at George Washington University, the Naval Post Graduate School in Monterey California, and at Qatar University.

Abstract: High power density and high efficiency of power electronics aboard ships is leading to ever more complex controls. At a high level, configuration management, resilience to faults, generator paralleling, load sharing, fast protection controls, and intelligent load shedding are now standard capabilities of shipboard supervisory controls. At a low level, various clamped and unclamped Pulse Width Modulation and Zero Volt Switching techniques have been devised to reduce losses and harmonics while increasing power density. The integration of all these controls has come with new challenges. Often times, the standards are in catch-up mode. In particular, stability of these systems has been a key factor and a challenge in the integration phase. The standard practice is to allow a significant period of time after installation for the tuning of the system. New stability criteria, standards, and measurement techniques are needed for successful and cost effective integration of these platforms.

Bjørn Gustavsen

SINTEF Energy Research, Norway

Frequency-dependent modelling of components in power electronics systems

June 29, 8:30 am, Auditorium EL5

Bjørn GustavsenBjørn Gustavsen was born in Norway in 1965. He received the M.Sc. degree and the Dr.Ing. degree in Electrical Engineering from the Norwegian Institute of Technology (NTH) in Trondheim, Norway, in 1989 and 1993, respectively. Since 1994 he has been working at SINTEF Energy Research where he is currently Chief Scientist. His interests include simulation of electromagnetic transients and modeling of frequency dependent effects. He spent 1996 as a Visiting Researcher at the University of Toronto, Canada, and the summer of 1998 at the Manitoba HVDC Research Centre, Winnipeg, Canada. He was a Marie Curie Fellow at the University of Stuttgart, Germany, August 2001–August 2002. He is convenor of CIGRE JWG A2/C4.52. (M’94–SM’2003–F’2014). More than ten years ago, Dr. Gustavsen developed the original version of the vector fitting method with Prof. Semlyen at the University of Toronto. The vector fitting method is one of the most widespread approaches for model extraction. In 2014 he was awarded IEEE fellowship for contributions to frequency-domain modeling techniques.
Abstract: The lecture focuses on the modelling of frequency-dependent behavior in components and subsystems. The following topics will be covered:
  1. Parameters for behavioral characterization of components: admittance parameters, scattering parameters, voltage transfers.
  2. Obtaining behavioral descriptions by calculations or measurements.
  3. Methods for extracting rational function-based models from behavioral descriptions, on pole-residue and state-space forms. Vector fitting, passivity assessment/enforcement. Interacting and non-interacting models.
  4. Methods for inclusion of models in circuit simulators.
  5. Application to modeling of transformers, sub-systems and cables.
  6. Application to power electronics components.

Aleks Prodic

The University of Toronto, Canada

Mixed-Signal Control of Emerging Hybrid Converter Topologies

June 30, 8:30 am, Auditorium EL5

Aleks ProdicProf. Prodic obtained his Dipl. Ing. degree from the University of Novi Sad (Serbia) in 1994 and received his M.Sc. and Ph.D. degrees from Colorado Power Electronics Center at the University of Colorado, Boulder, in 2000 and 2003, respectively. In 2003 he joined the Department of Electrical & Computer Engineering at the University of Toronto, where, in 2004, he formed Laboratory for Power Management and Integrated Switch-Mode Power Supplies (SMPS). Prof. Prodic’s general research interest is Power Electronics. Specific research interests include practical advanced control methods for power electronics, converter topologies, mixed-signal IC design for power electronics, low-power high-frequency switch-mode power supplies (SMPS) and power management systems. The applications of interest range from on-chip power supplies for portable devices to power management systems in vehicles. His research also covers use of power electronics in biomedical applications. In this area he has published more than 80 research papers. His research also resulted in more than 20 patents and patent applications, many of them have become commercial products.

Abstract: The lecture will start with a brief review of mixed-signal (digital) controllers that have pushed performance of switch-mode power supplies (SMPS) to their limit. Then, several new hybrid topologies (combining switched-capacitive SC and inductive energy processing will be presented. In this part, new control challenges related to regulation of the hybrid topologies will also be addressed. In the last part, several controllers offering possible solutions for the design challenges will be shown.