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New Mexico Tech

Electric Power

In support of ICASA's mission to solve critical infrastructure protection problems, the Electric Power team focuses on two research areas: 1) understanding fundamental behavior and vulnerabilities between power system components as they interact through the network, and 2) developing means by which precursors to large failures can be detected and their impact mitigated. Key elements of the research are modeling and simulation of electric power systems as hybrid dynamical systems, and analysis methods founded in control and systems theory.
Electric Power Lines

Hybrid dynamical system models provide the framework through which the two fundamentally different, yet joined, electric power system functions can be represented: 1) the network of interconnected dynamic components (generators, loads, controllers, transmission lines, etc.) responsible for power delivery and 2) the logical switching (breakers, load-tap changers, saturation, etc.) responsible for power quality and safety. Resulting models are of varied, user-selected resolution and form a set of switched differential-algebraic equations that are solved numerically through computer simulation. Computer simulation permits transient responses, component interactions, and global responses. System studies are cast within an “input-output” systems/control theory context where the influence of inputs and parameters on particular outputs is quantified through linear and nonlinear dynamical system analysis techniques. Implications of these studies include identification and level of interaction among components, and estimation of grid status and states from limited measurements.

Point of Contact: Dr. Kevin Wedeward

Electric Power Publications

Title
 
Authors
"A Reduced Generator Model with Excitation Limits." 2005 IASTED Power and Energy Systems Conference

  S. Ball, K. Wedeward, E. Barany, S. Schaffer
"A Research Code for Dynamic System Simulation and Analysis." Proc. International Test and Evaluation Association Modeling and Simulation Conference, Las Cruces, NM, December 2007

  S. Schaffer, K. Wedeward, and S. Ball.
"Parameter Estimation of Hybrid Dynamical Systems with Delayed Switching." Proc. International Test and Evaluation Association Modeling and Simulation Conference, Las Cruces, NM, December 2007.

  M. Hoffman, S. Schaffer, and K. Wedeward.
"Modeling, Simulation, and Vulnerability Analysis of Electric Power Systems," 73rd Military Operations Research Society Symposium Abstract

  M. Marshall, D. Ackley, K. Wedeward, and S. Ball
"Visualization Techniques for Dynamic Simulations of Electric Power Systems," 73rd Military Operations Research Society Symposium Abstract

  M. Marshall, D. Ackley, K. Wedeward, and S. Ball
"Nonlinear Controllability of Singularly Perturbed Models of Power Flow Networks," 2004 Conference on Decision Control

  E. Barany, S. Schaffer, K. Wedeward, and S. Ball
"Nonlinear Control of Power Network Models Using Feedback Linearization," 2005 International Association of Science and Technology for Development CSS

  S. Ball, E. Barany, S. Schaffer, and K. Wedeward
"An Integrated Approach to Modeling, Simulation, and Analysis of Critical Infrastructure Systems," Phalanx, December 2005

  S. Ball, M. Marshall, S. Schaffer, and K. Wedeward
“Cascades of Failure and Extinction in Evolving Complex Systems,” Journal of Artificial Societies and Social Simulation, Vol. 9, No. 4, 2006.   P. Ormerod and R. Colbaugh
“Estimation and Observation in the Presence of Missing Data and Uncertainty,” Presentation at the 74th Military Operations Research Society Symposium, Colorado Springs, CO, June 2006   M.A. Horejs, M. Marshall, S. Schaffer, K. Wedeward, and S. Ball
“SCADA/EMS and Vulnerability Analysis,” Presentation at the Military Operations Research Society Workshop on Transforming Information Assurance for Netcentric Operations, The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, March 2007   R. Hebert, S. Ball, K. Wedeward, and S. Schaffer,
“Electric Power System Modeling, Simulation and Analysis: Applications of Nonlinear Optimization to System Identification,” Presentation at the 75th Military Operations Research Society Symposium, Annapolis, MD, June 2007.   S. Ball, K. Wedeward, S. Schaffer, and M. Horejs,
“Electric Power System Modeling, Simulation and Analysis: A Tutorial,” Presentation at the 75th Military Operations Research Society Symposium, Annapolis, MD, June 2007.   K. Wedeward, S. Schaffer, M. Horejs, S. Orr, and S. Ball,
“Communications and Infrastructure Model Integration,” Presentation at the 76th Military Operations Research Society Symposium, New London, CT, June 2008.   L. Nolan, K. Wedeward, and M. Horejs,
"Parameter Estimation of Hybrid Dynamical Systems with Delayed Switching," Proc. International Test and Evaluation Association Modeling and Simulation Conference, Las Cruces, NM, December 2007   M. Hoffman, S. Schaffer, and K. Wedeward
"A Research Code for Dynamic System Simulation and Analysis," Proc. International Test and Evaluation Association Modeling and Simulation Conference, Las Cruces, NM, December 2007   S. Ball, S. Schaffer, and K. Wedeward 
"Estimation with Event Detection and Location in Electric Power Systems Using Constrained Optimization," M.S. Thesis, New Mexico Institute of Mining and Technology, 2008.   M. Smith
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