Decision and Control Lecture Series
Coordinated Science Laboratory
“Distributed Optimization Algorithms for Wide-Area Monitoring of Power Systems Using Synchrophasors”
Aranya Chakrabortty, Ph.D.
North Carolina State University
Wednesday, September 21, 2016
3:00 p.m. to 4:00 p.m.
CSL Auditorium (B02)
With the number of Phasor Measurement Units (PMUs) in the North American power grid scaling up into the thousands, system operators are gradually inclining towards distributed cyber-physical architectures for executing wide-area monitoring and control operations using Synchrophasors. Traditional centralized approaches, in fact, are anticipated to become untenable soon due to various factors such as data volume, security, single point of failure, communication overhead, and failure to adhere to real-time deadlines. In this talk I will propose three such distributed communication and computational architectures, and their associated distributed optimization algorithms, for one of the most critical applications run by utilities – namely, wide-area monitoring of power flow oscillations. In these architectures, the estimators located at the control center of a utility company run local convex optimization and consensus algorithms using Alternating Directions Multiplier Method (ADMM), and thereafter communicate with other control centers to reach a global solution. Both synchronous and asynchronous communication will be considered. I will discuss the convergence and accuracy trade-offs for each ADMM implementation, and also illustrate their architectural resiliency against denial-of-service and data-manipulation attacks using case studies from the recently federated ExoGENI-WAMS testbed between NC State and University and Renaissance Computing Institute at UNC Chapel Hill.
Aranya Chakrabortty is an Associate Professor in the Electrical & Computer Engineering department of North Carolina State University, Raleigh, NC. He received his Ph.D. degree from Rensselaer Polytechnic Institute, Troy, NY, in 2008 in Electrical Engineering. From 2008 to 2009 he was a post-doctoral research associate at University of Washington, Seattle. His research interests are in all branches of control theory, and their applications to power system dynamics and control using emerging technologies such as Wide-Area Measurement Systems (WAMS). Dr. Chakrabortty is a senior member of IEEE, and contributes actively to the North American Synchrophasor Initiative (NASPI). He received the NSF CAREER award in 2011.