Wide-Area Modeling, Monitoring and Control of Large Power Systems Using Phasor Measurement Technology
In this talk I will present an analytical framework for constructing tools for wide-area modeling, monitoring and damping control of power systems using Synchrophasor measurements with the objective of capturing and analyzing the macroscopic properties of such system dynamics over different time-scales of operation. Traditional methods of dynamic equivalencing are either based on model-based methods, which are computationally expensive, or on simulation-based techniques, which are too simplistic to capture the inter-area dynamics between the oscillation clusters in multi-modal systems. The first part of the talk will circumvent this problem by developing model-reduction methods by which the electro-mechanical dynamics coupling different parts of a large grid can be modeled accurately based solely on electrical measurements available from Phasor Measurement Units (PMU). The second part of the presentation will focus on deploying these macroscopic models for developing tools for situational awareness, transient stability monitoring and inter-area oscillation damping control. Ideas from passivity theory and model reference control will be used to construct such designs. A brief note on how the PMUs should be placed optimally in the network for generating the most accurate modeling and control strategies, especially when the PMU data are noisy and unreliable, will also be discussed. The overall motivation of the talk would be to understand how the WAMS technology can help us in gaining valuable insight about the physical behavior of the North American grid as it becomes more expansive, and, therefore, more complex over the next few years.
Aranya Chakrabortty is an Assistant Professor in the Electrical & Computer Engineering department of North Carolina State University, Raleigh, NC. Before joining NC State, he was an Assistant Professor in Texas Tech University, Lubbock, TX, prior to which he was a post-doctoral research associate in the Aeronautics and Astronautics department of the University of Washington, Seattle. He received his Ph.D degree in Electrical Engineering from Rensselaer Polytechnic Institute, Troy, NY in 2008. His research interests are in power systems dynamics and control using emerging technologies such as Wide-Area Monitoring systems (WAMS). Dr. Chakrabortty is a member of IEEE Power and Energy Society (PES), IEEE Control Systems Society (CSS), and contributes actively to the North American Synchrophasor Initiative (NASPI). He received the NSF CAREER award in 2011.
The seminar series is presented by the Trustworthy Cyber Infrastructure for the Power Grid (TCIPG) Project, an $18 million multi-university research effort whose partner institutions include the University of Illinois at Urbana-Champaign, Arizona State University, Dartmouth, and Washington State University. The TCIPG Project, a successor to the earlier NSF-funded TCIP Center, was founded in 2009 with support from the U.S. Department of Energy and the U.S. Department of Homeland Security. It is housed in the Information Trust Institute, University of Illinois at Urbana-Champaign.