Abstract
As the penetration level of variable-speed wind turbines continues to increase, characteristics of low inertia and lack of synchronous power of such devices can have a serious impact on the transient stability of a grid. One solution toward stabilizing such a grid with renewable energy sources is to provide additional inertia and synchronizing power in a virtual manner. This paper proposes an optimal control method that can follow the virtual generator model under constraints. As a result, it was shown that proposed method was possible to suppress the peak of the filter input power in instantaneous voltage drop.
