With the increasing penetration of wind energy and due to the large-scale utilization of wind turbines

the present power grid is developing into a system with the loss of rotational inertia

thus it brings about various stability problems. However

as the virtual synchronous generator(VSG)technology can mimic the characteristics of the conventional synchronous generator

the equivalent inertia and damping coefficient of wind turbines and the penetration rate of wind energy in the grid are improved. Firstly

the research prospect of VSG technologies which applied in the field of wind turbine control are introduced. Then

the coordinated control of maximum power point tracking(MPPT)and frequency support is discussed

as well as the energy balance between the actual turbine shaft and virtual shaft is revealed. Also

the designs and stability analysis of key parameters of VSG controlled wind turbines are elaborated. The specific applications in wind turbines are illustrated via the simulations on a permanent magnetic synchronous generator(PMSG)-based wind turbine and a doubly-fed induction generator(DFIG)-based wind turbine. Moreover

the feasibility and prospect of the VSG controlled wind turbines in the area of large wind farm aggregation and specific control methods are addressed. Finally

some remaining difficulties and perspective solutions are also demonstrated.