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A suboptimal control law to improve the transient stability of power systems

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2 Author(s)
Kumar, A.B.R. ; University of Missouri-Rolla, Rolla, Missouri ; Richards, E.F.

The application of optimal control theory to damp the electromechanical oscillations associated with the transient conditions in power systems has been given little attention. A suboptimal control law which minimizes the sum of the performance indices of the two linear systems given by a piece-wise linear model of a power system improves the transient stability better than the usual "optimal" control law obtained from a linearized model. Further, the suboptimal control law presented in this paper assures stability of the system for all disturbances resulting in rotor oscillations of magnitudes less than a preselected limit.

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Power Apparatus and Systems, IEEE Transactions on  (Volume:95 ,  Issue: 1 )