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A “Globally” Convergent Controller for Multi-Machine Power Systems Using Structure-Preserving Models

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4 Author(s)
Dib, W. ; Lab. des Signaux et Syst., CNRS-SUPELEC, Gif-sur-Yvette, France ; Ortega, R. ; Barabanov, A. ; Lamnabhi-Lagarrigue, F.

The design of excitation controllers to improve transient stabilization of power systems is a topic of renewed interest in the control community. Existence of a state-feedback stabilizing law for multi-machine aggregated reduced network models has recently been established. In this paper we extend this result in two directions: first, in contrast with aggregated models, we consider the more natural and widely popular structure-preserving models that preserve the identity of the network components (generators, loads and lines) and allow for a more realistic treatment of the loads. Second, we explicitly compute a control law that, under a detectability assumption, ensures that all trajectories converge to the desired equilibrium point, provided that they start and remain in the region where the model makes physical sense.

Published in:

Automatic Control, IEEE Transactions on  (Volume:54 ,  Issue: 9 )