In this talk, a transient stability analysis of an 18205 bus Western Electricity Coordinating Council (WECC) system has been carried out when all conventional sources have been replaced with converter interfaced generation (CIG). A novel positive sequence model of the converter based sources has been developed in commercial transient stability analysis software. A simple and computationally economical model of the converter has been developed while ensuring a reliable representation of the detailed converter behavior. This model has been implemented as a user defined model in commercial positive sequence software such as PSLF. The behavior of the proposed model in positive sequence has the same form as the behavior obtained from detailed point on wave simulation. In this 100% CIG system, the only rotating machines directly connected to the network are wound rotor induction generator wind turbines and induction motor loads. The inertia contribution of these rotating devices is small. With close to zero inertia in the system, the dynamic performance of the system under different contingencies is examined and discussed. The analysis conducted demonstrates that while such a futuristic system can survive certain contingencies, well designed coordinated wide-area converter control action may have to be incorporated to enhance the reliability of the system. The examination of the importance of modeling the source behind the inverter due to practical limitations on the size of the dc bus capacitor is also considered emphasized.
SmartGrid Seminar Winter 2016: Our speakers will discuss exciting new ideas and technologies that are changing the electricity industry. The theme of the seminar series is on smart grids and energy systems, with speakers from academic institutions and industry. The hour-long seminars, including ample time for discussion, are held at 1:00 pm or 1:15 pm approximately every Thursday.
VIJAY VITTAL is the Ira A. Fulton Chair Professor in the School of Electrical, Computer and Energy Engineering at Arizona State University. He received the Ph.D. degree in electrical engineering from Iowa State University in 1982. 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. 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 also co-authored the textbook entitled Application of Time-Synchronized Measurements in Power System Transmission Networks with M. Kezunovic, S. Meliopoulos, and V. Venkatasubramanian. During 1993-1994 he was the Program Director of the Power Systems Program at the U. S. National Science Foundation. He is a recipient of the 1985 U.S. Presidential Young Investigator Award. In 1997, he was elected as a Fellow of IEEE. He was also the recipient of the 2000 IEEE Power Engineering Society Outstanding Power Engineering Educator Award. In 2003 he received Iowa State University Foundation Award for Outstanding Achievement in Research and was also 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 Engineering Research Center, a Phase III National Science Foundation, Industry/University Collaborative Research Center consisting of 13 member universities and 40 industry members.