The 52nd North American Power Symposium (NAPS)
Arizona State University, Tempe, Arizona

April 11-14, 2021

Download the Program PDF

The Organizing Committee

  • Chair: Dr. Mojdeh Khorsand Hedman
  • Co-Chair: Dr. Kory Hedman
  • Publication Chair: Dr. Kory Hedman and Dr. Yang Weng
  • Industry Relations Chair: Dr. Gerald Heydt 
  • Website management: Dr. Yang Weng
  • Treasurer: Dr. Mojdeh Khorsand Hedman
  • Student Program Chair: Dr. Anamitra Pal


  • Arizona State University
  • Salt River Project
  • Arizona Public Service

Distinguished Guest Speakers

Anuradha Annaswamy, PhD
Massachusetts Institute of Technology

Dr. Anuradha Annaswamy is Founder and Director of the Active-Adaptive Control Laboratory in the Department of Mechanical Engineering at MIT. Her research interests span adaptive control theory and its applications to aerospace, automotive, and propulsion systems as well as cyber-physical systems such as Smart Grids, Smart Cities, and Smart Infrastructures. Her current research team of 15 students and postdocs is supported at present by the US Air-Force Research Laboratory, US Department of Energy, Boeing, Ford-MIT Alliance, and NSF. She has received best paper awards (Axelby; CSM), Distinguished Member and Distinguished Lecturer awards from the IEEE Control Systems Society (CSS) and a Presidential Young Investigator award from NSF. She is the author of a graduate textbook on adaptive control, co-editor of two vision documents on smart grids as well as two editions of the Impact of Control Technology report, and a member of the National Academy of Sciences Committee that published a report on the Future of Electric Power in the United States in 2021. She is a Fellow of IEEE and IFAC. She was the President of CSS in 2020.

Ben Kroposki, PhD, PE, IEEE Fellow
Director – Power Systems Engineering Center
National Renewable Energy Laboratory

Dr. Ben Kroposki is the Director of the Power Systems Engineering Center at the National Renewable Energy Laboratory (NREL) where he leads NREL’s strategic research in the design, planning and operations ofelectrical power systems. He has over 30 years of experience in the design, testing, and integration of renewable and distributed power systems and has more than 150 publications in these areas with over 7,700 citations. Dr. Kroposki received his BSEE and MSEE from Virginia Tech and Ph.D. from the Colorado School of Mines. Dr. Kroposki is the recipient of the IEEE Power & Energy Society (PES) Ramakumar Family Renewable Energy Excellence Award. This award has been established to recognize outstanding contributions in the field of developing, utilizing and integrating renewable energy resources in the national and global energy scenarios. As an IEEE Fellow, Dr. Kroposki was recognized for his leadership in renewable and distributed energy systems integration. Dr. Kroposki is also an Adjunct professor at the Colorado School of Mines and University of Colorado and teaches courses on integrating renewable energy into power systems.

Duncan Callaway, PhD
University of California, Berkeley

Duncan Callaway is an Associate Professor of Energy and Resources at the University of California, Berkeley. He is also a faculty affiliate in Electrical Engineering and Computer Science, and a faculty scientist at Lawrence Berkeley Laboratory. He received his PhD from Cornell University. He has held engineering positions at Davis Energy Group and PowerLight Corporation, and academic positions at UC Davis, the University of Michigan and UC Berkeley. Duncan teaches courses on electric power systems and at the intersection of statistical learning and energy. His research focuses on grid integration of renewable electricity and models and control strategies for demand response, electric vehicles and electricity storage.


Sunday, 4/11/2021

1-2 p.m. IEEE PES PEEC Meeting
2-3 p.m. NAPS Steering Committee Meeting

Monday, 4/12/2021

7:45-9 a.m.

Welcome and Opening Remarks, Dr. Stephen Phillips, the Chair of School of Electrical, Computer, and Energy Engineering, ASU

Plenary Session 1. Distinguished Speaker: Dr. Anuradha Annaswamy

9-9:30 a.m. Break
9:30-11 a.m. Session 1.1 – Session 1.6
11-11:30 a.m. Break
11:30 a.m.-1 p.m. Session 2.1 – Session 2.6

Tuesday, 4/13/2021

8-9:00 a.m. Plenary Session 2. Distinguished Speaker: Dr. Ben Kroposki
9-9:30 a.m. Break
9:30-11 a.m. Session 3.1 – Session 3.6
11-11:30 a.m. Break
11:30 a.m.-1 p.m. Session 4.1 – Session 4.6

Wednesday, 4/14/2021

8-9:00 a.m. Plenary Session 3. Distinguished Speaker: Dr. Duncan Callaway
9-9:30 a.m. Break
9:30-11 a.m. Session 5.1 – Session 5.6
11-11:30 a.m. Break
11:30 a.m.-1 p.m. Session 6.1 – Session 6.6
1-1:30 p.m. Best Paper Selection and Closing Remarks

Plenary Sessions

Plenary Session 1: Monday 4/12/2021, 8:00am-9:00am

Guest Speaker: Dr. Anuradha Annaswamy
Title: Distributed Control and Optimization for Integration of Renewables in Smart Grids
Abstract: Significant changes have occurred over the past decade in the energy landscape, especially in the power sector. World over, there’s a big push towards a 100% incorporation of wind and solar power for electricity production. Natural gas prices have declined, costs of renewable energy technologies have come down, and large‐scale battery energy storage technologies have advanced rapidly. A large percentage of renewable energy resources are expected to be deployed on the distribution grid. This, along with the emergence of Internet‐of‐Things (IoT)‐networks, provides a unique opportunity to enhance situational awareness of distribution systems and enable resilient operation. There are however a host of challenges, most of which are due to the intermittency and unpredictability of the renewable energy resources. Most of the requisite solutions for the deep integration of these renewable resources for electricity production are control‐centric. A distributed optimization approach that judiciously
combines renewable generation with storage and flexible loads has the possibility for ensuring power balance. A distributed control approach that enables a coordinated network of millions of controllers, all integrated with solar and wind power generation nodes, storage sites, and flexible consumption can lead to effective frequency regulation and voltage control in real‐time. In this talk, some of these challenges and opportunities for future directions will be discussed. How private and secure communication, data aggregation, and retail market design can be used to leverage flexible loads for power grid operation, will also be addressed. Examples of use cases that illustrate the role of optimization and control in renewable‐rich power grids will be presented.

Plenary Session 2: Tuesday 4/13/2021, 8:00am-9:00am

Guest Speaker: Dr. Ben Kroposki
Title: The Power System – Moving towards a Clean Energy Future
Abstract: Across the US, more states and electric utilities are setting clean energy goals of which renewable technologies will be a major player. Variable renewable energy like wind and solar photovoltaics (PV) differ from conventional generation in that they use power electronic converters instead of synchronous generators to connect to electric power grids. At small levels, the power grid can easily handle the integration of variable renewable energy. At much higher levels, there are a number of technical concerns that must be addressed to ensure reliable and economic operations. This presentation will discuss the challenges and solutions to operating power system with high levels of variable renewables and how power electronic interfaces can be used to solve some of these challenges.

Plenary Session 3: Wednesday 4/14/2021, 8:00am-9:00am

Guest Speaker: Dr. Duncan Callaway
Title: Exploring Future Power System Stability
Abstract: As inverter based resources displace power generation from conventional synchronous machines, power system transient dynamics evolve from being dominated by electromechanical and electromagnetic phenomena to also including human-engineered control loops embedded within power electronic converters. How will these new control loops change the way power system engineers assess and plan for power system stability? This talk seeks to provide some answers to these questions byre-examining some of the assumptions we typically make when evaluating power system stability. I will discuss some of our recent work examining the role of line dynamics and dc-side converter modeling on power system stability, and discuss some paths forward for modeling and control design.