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A New Excitation Control for Multimachine Power Systems I: Decentralized Nonlinear Adaptive Control Design and Stability Analysis  

Psillakis Haris E. (Department of Electrical and Computer Engineering, University of Patras)
Alexandridis Antonio T. (Department of Electrical and Computer Engineering, University of Patras)
Publication Information
International Journal of Control, Automation, and Systems / v.3, no.spc2, 2005 , pp. 278-287 More about this Journal
Abstract
In this paper a new excitation control scheme that improves the transient stability of multi machine power systems is proposed. To this end the backstepping technique is used to transform the system to a suitable partially linear form. On this system, a combination of both feedback linearization and adaptive control techniques are used to confront the nonlinearities. As shown in the paper, the resulting nonlinear control law ensures the uniform boundedness of all the state and estimated variables. Furthermore, it is proven that all the error variables are uniformly ultimately bounded (DUB) i.e. they converge to arbitrarily selected small regions around zero in finite-time. Simulation tests on a two generator infinite bus power system demonstrate the effectiveness of the proposed control.
Keywords
Multimachine power system control; adaptive control; backstepping design; decentralized control;
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