By Topic

Effects of generator and static-load nonlinearities on electromechanical oscillations

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
D. J. Trudnowski ; Montana Univ., Butte, MT, USA ; J. E. Dagle

Linear analysis methods, such as eigenanalysis and Prony analysis, are becoming standard tools in studying power system electromechanical oscillations. Because the actual system is nonlinear, large-amplitude oscillatory swings will not necessarily have frequency and damping characteristics indicated by the eigensolution. Understanding the differences can be critical in comparing eigenanalysis and simulated results, and in applying Prony analysis to the nonlinear swings. This paper investigates the effects of excitation limiting, magnetic saturation, the swing equation, and static-load model properties on the linearity of a power swing. Simulation, eigenanalysis, and Prony analysis results are compared on a four-machine system operating under several conditions. It is found that significant differences occur between the eigenanalysis and simulation results when heavy excitation limiting occurs during the swing. Generator magnetic saturation tends to cause the simulated results to have more effective damping than the eigensolution. Other nonlinearities cause little or no differences. Prony analysis tends to match the simulated swing, except if excitation limiting occurs

Published in:

IEEE Transactions on Power Systems  (Volume:12 ,  Issue: 3 )