Abstract
Virtual inertia control of wind turbines can provide frequency regulation for the power grid, which is an effective way to maintain the frequency stability of the power system with high penetration of renewable generations. The arrangement of virtual inertia control and the tuning of the virtual inertia controller parameters determine its frequency support effect and system frequency response, which also influence the operation and mechanical wear of the wind turbines. In this paper, the selection of the virtual inertia controller parameters is investigated from the system level considering the power disturbances possibility. First, the power disturbances possibility of a power system with high penetration of wind power is discussed considering the fluctuations of wind power and disturbances of the loads. Then, the requirement of the system inertia to maintain the frequency stability (frequency response indices in the limited ranges) is investigated, and the inertia needed from the wind turbines is calculated according to the requirement. Finally, the IEEE 10 machine 39 bus power system model is utilized to validate the proposed virtual inertia controller parameter tuning method. The proposed method will be helpful for deploying the frequency control strategies of the power system with high penetration of wind power and maintain its frequency stability.
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