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This study investigates a novel operating method of the interconnected power grid to improve dynamic stability using variable inertia control of large wind farms. In this scheme, the system inertia is considered as an adjustable operating parameter which can be regulated for inter-area power oscillation control and frequency support. Based on the linear state equations derived from a two-area interconnected...
The power system frequency stability depends on system power balance, and the required active power for the power balance can be quickly obtained from the kinetic energy stored in the rotating mass. A power control strategy of the permanent magnet synchronous generator (PMSG) is presented for the system dynamic frequency support. On the one hand, a supplemental active power control loop is added in...
This paper investigates the frequency control scheme of a doubly fed induction generator (DFIG)-based wind farms to provide frequency support for the power system steady operation. Due to the decoupling of the rotor speed and the grid frequency by the connected converters, the DFIG-based wind farm rarely contributes to the network effective inertia. This is particularly true in the small isolated...
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