Abstract

For a power system, a large power angle error or generator relative speed could result in unrecoverable failure or system damage. To deal with this problem, in this paper, a performance guaranteed adaptive excitation controller is designed for a single machine infinity bus power system. The Direct Feedback Linearization (DFL) technique is used to transfer the original system model to a linear one which is independent of the operating points. The transient performance is shaped by predefined constraints which can be made arbitrarily by the users. To ensure constraint satisfaction, an error transformation technique is introduced to generate a new system, whose stability is enough to solve the constraint problem. Moreover, a backstepping based adaptive control methodology is proposed with some uncertainties of system dynamics, which are compensated by some adaptive tuning variables. With the help of the standard Lyapunov synthesis, the closed-loop system is proved to be asymptotically stable, and all the other signals are bounded. Eventually, the theoretical results are illustrated in the simulation studies.

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