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An Optimal Control Lay by Eigenvalue Assignment for Improved Dynamic Stability in Power Systems

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2 Author(s)
Kumar, A.B.R. ; Harris Controls ; Richards, E.F.

Whenever control laws are computed on the basis of linear optimal control theory and implemented on non-linear systems, such as power systems, the performance is not as good as expected because of saturation type non-linearities in the system components. The only way to ensure that a control law is adequate, short of actually testing the real system, is to observe the simulated behavior of the system. Departure between a calculated linear control law and the actual response can be minimized by (a) computing a feedback control law with gains of small magnitudes to achieve a pre-assigned set of eigenvalues for the closed loop system and by (b) judicious assignment of the eigenvalues to be achieved. This paper discusses a method for achieving such a control law.

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Power Apparatus and Systems, IEEE Transactions on  (Volume:PAS-101 ,  Issue: 6 )