Abstract
This work proposes optimally tuned turbine governor parameters of a hydro power station to improve the dynamic stability of a variable wind-penetrated power system network. A four-machine two-area system with four hydro generators is being considered for this study with wind sources. The governors of generators are coordinately controlled by a modified DE with WOA algorithm. The input wind penetrations are varied to create oscillations in power systems, and these oscillations are damped by turbine governor action with an optimally set of their parameters. The variation in angular frequency is taken as input to control action, and Woodward-type governors have been considered for all hydro generators. The objective function has been considered subject to sudden raise in input power to generator by 10%. It is observed that optimized hydro governors can efficiently provide sufficient damping torque to the electromechanical oscillation to enhance dynamic stability of power system due to variable wind source penetration.
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