H∞ optimisation-based power system stabiliser design

Abstract
An H∞ optimal control method is outlined to deal with uncertainties in power system modelling and operation as they affect the design of a power system stabiliser (PSS). The paper focuses on the design process for PSS using a nominal model with an uncertainty description which represents the possible perturbation of a synchronous generator around its normal operating-point. The uncertainties are due to incomplete knowledge of the physical system in the model formulation process and system abnormal operating conditions. The proposed excitation controller enables the power system to remain stable over a wide range of operating conditions.

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