Virtual Inertia and Primary Frequency Regulation Characterization Based on Doubly-fed Wind Turbine
Doubly-fed wind turbine itself does not have the ability to make timely response to the grid frequency change,which to some extent affects its stable operation in the complex and changeable grid environment.For this reason,this paper combines inertia and primary frequency control,studies the frequency nature of wind turbines,utilizes the frequency control strategy of pitch control technology to adjust the static regulation coefficient of wind turbines,and combines the virtual inertia control with additional improvement of the sag control to complete the comprehensive frequency regulation of wind turbines on the system.Simulation results show that the integrated frequency control scheme can effectively reduce the amplitude of system frequency rise(fall)as well as the static frequency deviation when the unit load is suddenly increased(decreased),thus effectively supporting the system inertia.
doubly-fed wind turbinevirtual inertiasag controlprimary frequency regulation
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