Keynote Speakers

Professor Claudia Rahmann, SERC Director. University of Chile, Chile.

Key outcomes of the Task Force on Definition and Classification of Power System Stability – Revisited & Extended

A task force set up jointly by the IEEE Power System Dynamic Performance Committee and the CIGRE Study Committee (SC) 38, currently SC C4 – System Technical Performance, had addressed the issue of stability definition and classification in power systems from a fundamental viewpoint and had closely examined the practical ramifications. At the time this document was published in 2004, the dynamic behavior of power systems was predominantly determined by the dynamic performance of synchronous generators and their controls as well as the dynamic performance of the loads. Consequently, [1] primarily dealt with fairly slow, electromechanical phenomena, typically present in power systems dominated by synchronous machines, while fast transients related to the network and other fast-response devices were considered out of scope and thus neglected. Thus, for the purposes of stability analysis in the bandwidth of interest, all fast-electromagnetic transients are neglected as they typically decay rapidly. Since the publication of [1], however, electric power systems worldwide have experienced a significant transformation, which has been predominantly characterized by an increased penetration of power electronic converter interfaced technologies. Among these new technologies are wind and photovoltaic generation, various storage technologies, FACTS devices, HVDC lines, and power electronic interfaced loads. With significant integration of converter interfaced generation (CIGs), loads, and transmission devices, the dynamic response of power systems has progressively become more dependent on (complex) fast-response power electronic devices, thus, altering the power system dynamic behavior. Accordingly, new stability concerns have arisen which need to be appropriately characterized, classified, and defined. This presentation will summarize the key outcomes and insights obtained by the Task Force after 3 years of joint work.

About Professor Rahmann

Professor Claudia Rahmann was born in Santiago, Chile, on September 15, 1979. She received the degree in Electrical Engineering from University of Chile, Chile in 2005 and the PhD in Electrical Engineering from the RWTH Aachen University, Germany, in 2010. She is currently Associate Professor in the Electrical Engineering Department at the University of Chile, Santiago, Chile and director of the Solar Energy Research Center of Chile, SERC. She has actively participated in different activities of the IEEE Power & Energy Society, being editor of the scientific journals such as IEEE Transactions on Sustainable Energy and IEEE Transactions on Smart Grids as well as secretary of the Task Force on “Stability definitions and characterization of dynamic behavior in systems with high penetration of power electronic interfaced technologies” created by the Power System Dynamic Performance Committee of the IEEE. Her main interests are dynamic modeling of electrical power systems, power systems control and stability, energy storage systems, control strategies for integration of wind and PV power plants into power systems, and optimization algorithms for power systems.

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Professor Raul Monroy Instituto Tecnológico de Monterrey, México.

A family of contrast-pattern based classifiers for class-imbalance problems

In this talk an overview of a family of contrast-pattern based classification mechanisms, especially designed to deal with class-imbalance problems, is presented. In particular, the internal workings of three classifiers, namely: PBC4cip, MHLDT and FT4cip will be addressed. Pros and cons will be elucidated, as well as giving an outline of some greatest hits.

About Professor Monroy

Professor Raúl Monroy obtained a PhD in Artificial Intelligence in 1998 from Edinburgh University, under the supervision of Prof. Alan Bundy. He has been in Computing at Tecnologico de Monterrey, since 1985, where he is a (full) Professor and and the founder of the research group in Advanced Artificial Intelligence. Prof. Monroy is a member of the CONACYT-SNI Mexican Research System, currently rank 3 (top). He is a fellow of the Mexican Academy of Sciences and of the Mexican Academy of Computing. His research focuses on the design and development of novel machine learning models, which he often applies in the domain of cyber security, public security, etc. Prof. Monroy has held 15 research grants from several funding agencies, and he is the sole or joint author of over 90 published papers. He has been President of the Mexican Society for Artificial Intelligence (2010 — 2012), chair of the CONACYT Research Network on ICT (2012 — 2014), and Secretary Elected to the Mexican Academy of Computing (2018 — 2020).

Dr. Roberto S. Murphy Arteaga, IEEE Electron Devices Society Distinguished Lecturer. INAOE, Mexico

Semiconductor Devices and Passive Components Characterization for High Frequency Applications

The development of integrated circuit manufacturing processes in the last few years has translated into ever more smaller features for the elements they are comprised of, being now just 5 nm. This makes it possible to attain higher frequencies of operation, in the order of tens and hundreds of GHz. Since modern processes are based on silicon, and circuits are designed mostly using CMOS technology, circuits can be designed and manufactured to operate with very low power, making them ideal for high frequency, wireless communications with hand-held devices. But besides having transistors, integrated circuits include passive devices such as inductors, capacitors, resistors and interconnects, among others.

Before sending a circuit to the fab, the designer has to be sure that it is going to work as desired, and thus its behavior has to be extensively simulated suing computers. In order to achieve trustworthy simulations, however, it is fundamental to have models —physical, mathematical, electrical— for each device and component, models which are obtained from individual characterization processes. This talk focuses on presenting some of the basic concepts of device characterization and modeling techniques for high frequency applications, highlighting the second-order effects present in this frequency range, suggesting a methodology to use to obtain trustworthy models for simulation routines.

About Dr. Murphy

Dr. Roberto Murphy is a Senior Researcher at the Astronomy, Optics and Electronic National Institute (INAOE), where he works since 1988 associated with the Electronics Coordination. His field of interest focuses on high-frequency electronics, especially in physics, modeling and characterization of devices for wireless communications applications.

Additionally, he has performed administrative tasks at INAOE for more than 17 years; was Director of Academic Training and Director of Research, and now he is the head of the Electronics Department. Served as Treasurer, Vice President and President of the Mexican Council of Postgraduate Studies, A.C. (COMEPO), and has also been a member of the Board of Directors and later President of the Iberoamerican Science and Technology Education Consortium (ISTEC), a non-profit academic organization based in Albuquerque, New Mexico, USA.

He has published more than 150 papers in scientific journals, conferences and newspapers, has taught more than 90 postgraduate courses and has supervised 32 degree dissertations. He is Level 2 in the National System of Researchers, member of the Academy Mexicana de Ciencias, from the European Microwave Association, and is a Senior Member of the Institute of Electrical and Electronics Engineers (IEEE), association professional of which he is also a “Distinguished Lecturer” for the Society of Electronic Devices (EDS).

Professor Glauco N. Taranto, Federal University of Rio de Janeiro, Brazil.

“Synchronized-Measurement Applications in Power System Stability, Protection and Control”

Synchronized measurements obtained from phasor measurement units (PMU) are a reality in many electric power systems (EPS) around the globe. State estimation, wide-area monitoring, protection and control, fault detection, parameter estimation, dynamic line rating, out-of-step protection, voltage stability, oscillatory modal identification, are few examples of applications that have been deployed in EPS. While some of the applications are in early stages with only simulation results available to support their effectiveness,
others have been successfully implemented in the field. The talk will highlight three prospective applications of synchronized measurements in EPS. The first application will be on voltage stability assessment in transmission systems, the second application will be on out-of-step protection for controlled islanding, and the third application will be on angle difference control of embedded HVDC links to reduce system losses and avoid power loop flows.

About Dr. Taranto

Glauco N. Taranto obtained the B.Sc. degree from State University of Rio de Janeiro (1988), the M.Sc. degree from Pontifical Catholic University of Rio de Janeiro (1991), and the Ph.D. degree from Rensselaer Polytechnic Institute, Troy, NY, USA (1994), all in Electrical Engineering with emphasis in power systems. In 2006 he was a visiting fellow in Centro Elettrotecnico Sperimentale Italiano, Milan, Italy. Dr. Taranto is Professor of the Federal University of Rio de Janeiro, Brazil. He is the chair of the Power System Stability Subcommittee of the IEEE PES Power System Dynamic Performance Technical Committee, and chair of the Task Force on “Integrating Relay Models in RMS Dynamic Simulations”. He was Editor of the IEEE Transactions on Power Systems (2016-2020). Prof. Taranto was the general chair of four International Workshops on Synchrophasor Applications in Rio de Janeiro, 2012-2015. He was awarded by FAPERJ – Rio de Janeiro R&D Agency – as distinguished scientist of Rio de Janeiro State. He is member of the steering committee of
the Smart Grid Synchronized Measurements and Analytics (SGSMA) conference and member of the technical program committee of Power System Computation Conference (PSCC). Prof. Taranto has supervised over 60 Ph.D. and M.Sc. students and published over 200 journal and conference papers.

Prof. Keyue Ma Smedley, IEEE Fellow, IEEE PELS DLP, University of California at Irvine

Challenging the Barrier of Bulky Magnetics in Power Conversion

PWM converters have been the workhorse for most power conversion applications today. However, their bulky magnetics limit further power density improvement. Researchers in the community have been searching for new solutions with better efficiency, regulation, and power density at the confluence of PWM, resonant, and switching-capacitor converters. The UCI (UC Irvine) Power Electronics Laboratory has dedicated its effort to this search for the last eight years. We have discovered several new switched-capacitor converters and resonant switched-capacitor converters. Recently, we made a breakthrough to realize full-range voltage regulation of resonant switched capacitor converters with a small inductor. In this speech, Dr. Smedley will present a general “PWM-like” control method for resonant switched-capacitor converters with only a 2X frequency swing and only one small inductor (nano-henry scale without DC bias). This new generation of power converters can replace a wide array of conventional PWM converters, dramatically reduce magnetic components, and eventually eliminate the bulky magnetics in fully integrated power chips.

About Professor Ma Smedley

Professor Keyue Smedley, Caltech Ph.D. is currently a Professor in the Department of EECS at the University of California, Irvine (UCI), the Director of the UCI Power Electronics Laboratory, and a co-founder of One-Cycle Control, Inc. Her work has resulted in more than 200 technical publications, numerous U.S. and international patents, and wide industrial applications. Dr. Smedley is a recipient of the UCI Innovation Award 2005. She was elevated as IEEE Fellow in 2008 for her contribution to high-performance switching power conversion. Her work with One-Cycle Control, Inc. won the Department of Army Achievement Award in Pentagon in 2010. Dr. Smedley is an IEEE PEL Distinguished Lecturer since 2021.