The increase of wind power penetration has brought new problems to the safe and stable operation of power system

especially the voltage stability after wind power integration. In order to make full use of DFIG’s voltage control ability

a direct voltage control strategy is proposed in this paper

which takes the current reference value obtained from the first-order inertia step of the voltage deviation as the DFIG converter inner-loop current control of the input signal to the output power of the DFIG as the control object

to achieve voltage control. The simulation results show that the wind farm using direct voltage control strategy

with fast reactive voltage regulation during system disturbances

can effectively control the wind farm grid-connected point voltage and local system voltage levels can be restored well. This can lay the foundation for DFIG wind farm to participate in system coordinated voltage control.