This talk deals with the development of a new electromagnetic transient (EMT)-transient stability (TS) hybrid simulation platform and its application to fault-induced delay voltage recovery (FIDVR) study on the WECC system. The first part of the talk focuses on the development of the EMT-TS hybrid simulation platform, which integrates PSCAD/EMTDC and the open source power system simulation software InterPSS. The developed platform features a decoupled architecture and flexible switch of interaction protocols. A socket-based communication framework is developed to provide inter-process communication between the two simulators. A new hybrid interaction protocol with a corresponding protocol switching algorithm is also proposed. A multi-port three-phase Thévenin equivalent is proposed for representing an external network in an EMT simulator, which allows simulation of unsymmetrical faults within the internal network without the constraint of balanced voltages at the boundary. The second part of the paper deals with detailed simulation of residential air conditioner (A/C) compressor motor stalling and the corresponding fault induced delayed voltage recovery (FIDVR) event in a region within the WECC system, using the EMT-TS hybrid simulation developed in its companion paper. A fault voltage magnitude-based criterion is proposed for internal network boundary identification. Modeling of the internal network with multi-port three-phase Thévenin equivalents in PSCAD is discussed. A special two-step initialization approach is introduced to initialize internal networks with a large percentage of induction motor loads. Detailed simulation of residential air conditioner (A/C) compressor motor stalling and FIDVR phenomenon within a large power system under symmetrical faults is realized for the first time. The phenomenon of A/C motor stalling spreading to A/C units on the unfaulted phase is observed and analyzed. In addition, the sensitivity of simulation results with respect to load composition is studied. Finally, the point-on-wave effects of the A/C stalling are also analyzed.
VIJAY VITTAL was born in Bengaluru, India. He received the B.E. degree in electrical engineering from the B.M.S. College of Engineering, Bangalore, India, in 1977; the M.Tech. degree in electrical engineering from the Indian Institute of Technology, Kanpur, India, in 1979; and the Ph.D. degree in electrical engineering from Iowa State University, Ames, in 1982. Currently he is the Ira A. Fulton Chair Professor in the School of Electrical, Computer and Energy Engineering at Arizona State University. From 1982 – 2004 he served as a faculty member at Iowa State University. His research interests are in the area of power system dynamics, dynamic security assessment of power systems, power system operation and control, and application of robust control techniques to power systems. He is the author and co-author of several papers in his field. In 1992 he co-authored the textbook entitled Power System Transient Stability Assessment Using the Transient Energy Function Method with A. A. Fouad, in 1999 he co-authored the textbook entitled Power System Analysis with A. R. Bergen, in 2012 he co-authored the textbook entitled Grid Integration and Dynamic Impact of Wind Energy with Raja Ayyanar and in 2014 he co-authored the textbook entitled Application of Time-Synchronized Measurements in Power System Transmission Networks with Mladen Kezunovic, Sakis Meliopoulos and Vaithianathan Venkatasubramanian. He is a recipient of the 1985 U.S. Presidential Young Investigator Award. In 1997, he was elected as a Fellow of IEEE for contributions “to the development of the transient energy function method and its application to power system dynamic security assessment, and for leadership in power engineering education and research.” He was also the recipient of the 2000 IEEE Power Engineering Society Outstanding Power Engineering Educator Award. From 1998-2000 he was the Chairman of the IEEE Power Engineering Society System Dynamic Performance Committee. He was the technical program chair for the 2001 IEEE PES Summer Power Meeting. He was elected to the U.S. National Academy of Engineering in 2004. From 2005-2011 he served as the Editor in Chief of the IEEE Transactions on Power Systems. In 2013 he was awarded the IEEE Herman Halperin T&D Field Award. Since 2005 Dr. Vittal has also served as the Director of the Power System Engi-neering Research Center, a Phase III National Science Foundation, Industry/University Collaborative Research Center consisting of 13 member universities and 40 industry members.