Computation of Margins to Power System Loadability Limits Using Phasor Measurement Unit Data

Presented By:
Pete Sauer, Grainger Professor of Electrical Engineering, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign
Date and Location:
Friday, April 6, 2012 - 1:00pm
NCSA Auditorium | Webcast
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This talk will discuss an algorithm to evaluate the margins to loadability limits of power systems without a full mathematical model. It will utilize the concept of Thevenin equivalents behind key transmission line terminals whose voltages and currents are available as phasor measurement unit data. Loadability will be described in terms of the thermal, voltage and stability constraints obtained from these Thevenin equivalents. The talk will begin with the origins of these loadability limits and the potential problems with their use. It will present some challenges associated with the computation of the Thevenin equivalent needed to apply the loadability limit criteria. It will conclude with a discussion of the cyber infrastructure needed to compute these margins.


Pete Sauer obtained his BSEE from the University of Missouri at Rolla in 1969, and the M.S. and Ph.D. degrees in Electrical Engineering from Purdue University in 1974 and 1977 respectively. He served as a facilities design engineer in the U.S. Air Force from 1969 to 1973. He is currently the Grainger Professor of Electrical Engineering at the University of Illinois at Urbana-Champaign. His main work is in modeling and simulation of power system dynamics with applications to steady-state and transient stability analysis. He served as the program director for power systems at the National Science Foundation from 1990 to 1991. He was a cofounder of PowerWorld Corporation and the Power Systems Engineering Research Center (PSERC). He is a registered Professional Engineer in Virginia and Illinois, a Fellow of the IEEE, and a member of the U.S. National Academy of Engineering.

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About the TCIPG Seminar Series:

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.