Adaptive nonlinear excitation control of synchronous generators

  • Gilney Damm
  • Riccardo Marino
  • Françoise Lamnabhi-Lagarrigue
Conference paper
Part of the Lecture Notes in Control and Information Sciences book series (LNCIS, volume 281)


In this paper, continuing the line of our previous works, a nonlinear adaptive excitation control is designed for a synchronous generator modeled by a standard third order model on the basis of the physically available measurements of relative angular speed, active electric power and terminal voltage. The power angle, which is a crucial variable for the excitation control, is not assumed to be available for feedback, as mechanical power is also considered as an unknown variable. The feedback control is supposed to achieve transient stabilization and voltage regulation when faults occur to the turbines so that the mechanical power may permanently take any (unknown) value within its physical bounds. Transient stabilization and voltage regulation are achieved by a nonlinear adaptive controller, which generates both on-line converging estimates of the mechanical power and a trajectory to be followed by the power angle that converges to the new equilibrium point compatible with the required terminal voltage. The main contributions here, compared with our previous works, is the use of on-line computation and tracking of equilibrium power angle, and the proof of exponential stability of the closed loop system for states and parameter estimates, instead of the previous asymptotical one.


Equilibrium Point Close Loop System Mechanical Power Voltage Regulation Terminal Voltage 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Gilney Damm
    • 1
  • Riccardo Marino
    • 2
  • Françoise Lamnabhi-Lagarrigue
    • 1
  1. 1.Laboratoire des Signaux et SystèmesCNRSGif-sur-Yvette CedexFrance
  2. 2.Dipartimento di Ingegneria ElettronicaUniversità di Roma Tor VergataRomeItaly

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