The PJM Interconnection has successfully implemented an on-line transient stability assessment (TSA) system at its energy control center. The strategy of using an effective scheme to screen out a large number of stable contingencies, capture critical contingencies, and apply detailed simulation programs to only potentially unstable contingencies is well recognized. We extend this strategy to on-line transient stability and low-damping of a large list of contingencies. Given a set of credible contingencies, the strategy would break the task into three stages:
Stage 1: Perform dynamic contingency screening to quickly screen out contingencies that are definitely stable. Stage 2: Perform low-damping contingency screening to quickly screen out contingencies that are definitely high-damping from the set contingencies screened out at Stage 1. Stage 3: Perform a detailed assessment of the dynamic performance for each contingency remaining at Stage 1 and Stage 2.
TEPCO-BCU was selected as a fast screening tool to improve on-line performance of the PJM TSA system. An evaluation study of TEPCO-BCU in a real-time environment has been conducted on a 14,500-bus, 3000-generator realistic system.
Dr. Chiang received his Ph.D. degree in EECS from the University of California at Berkeley. He is Professor of Electrical Engineering at Cornell University, Ithaca, New York. He and his research team have published more than 400 papers in refereed journals and conference proceedings. His current research interests include nonlinear system theory, nonlinear computation, nonlinear optimization and their practical applications. He holds 17 U.S. and oversea patents. His book, “Direct Methods for Power System Stability Analysis” was published by Wiley and IEEE Press in 2010. His second book, “Stability Regions of Nonlinear Dynamical Systems: Theory, Estimation and Applications” will be published by Cambridge Press in 2015. He is the founder of BigwoodSystems Inc. (1995, NY, USA) and of Global Optimal Technology Inc. (2000, NY, USA).
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