Speaker
Professor Udaya Annakage, Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg, Manitoba, Canada
Topic
Power System Applications of Eigenstructure Assignment
Abstract
The well-known control system design technique of pole assignment (or eigenvalue assignment) aims to achieve desired damping performance by placing the closed loop poles (closed loop eigenvalues) of a control system at desired locations in the complex plane. If we are interested in placing only a few eigenvalues at desired locations, there are many different controllers that can give exactly the same desired eigenvalue locations. This provides the control designer with extra degrees of freedom to specify additional performance criteria. While the closed loop eigenvalues determine the frequency and damping of the modes, the shape of the response of outputs is governed by the eigenvectors. The additional degree of freedom mentioned above can be utilized to assign eigenvectors. In a typical power system there are many oscillatory modes, but except for only a few oscillation modes the rest are well damped. The goal of control design is to improve the damping of only the few poorly damped modes. Therefore, eigenstructure assignment is well suited for the problem of power oscillation damping controller design. In this presentation, two power system applications will be presented after a brief introduction to the basic concepts of eigenstructure assignment. The first example is on designing a damping controller and the second example is on identifying controller transfer functions for a black-boxed device connected to a power system.
About the Speaker
Dr. Udaya Annakkage has more than 30 years of experience in teaching, research and consulting. His main strength is in the area of power system stability. He received the B.Sc. (Eng.) degree from the University of Moratuwa, Sri Lanka, in 1982 and the M.Sc. and Ph.D. degrees from the University of Manchester Institute of Science and Technology (UMIST), Manchester, U.K., in 1984 and 1987, respectively. He has supervised more than fifteen PhD students and several MSc students at the University of Manitoba, Canada, and the University of Auckland in New Zealand. He has served on several IEEE and CIGRE working groups. He was an editor of IEEE Transactions on Power Systems from 2009 – 2012 and the Head of Electrical and Computer Engineering Department at the University of Manitoba from 2008 - 2012. He is currently the convenor of CIGRE Working Group on “Application of Phasor Measurement Units for Monitoring Power System Dynamic Performance”.
Invited by Professor Kankar Bhattacharya.