A “Globally” Convergent Controller for Multi-Machine Power Systems Using Structure-Preserving Models |
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Authors: | Dib W. Ortega R. Barabanov A. Lamnabhi-Lagarrigue F. |
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Affiliation: | Lab. des Signaux et Syst., CNRS-SUPELEC, Gif-sur-Yvette, France; |
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Abstract: | 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. |
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