During the operation of a wind farm

there is often a control problem in which the voltage and power factor of the point of common coupling（PCC） cannot be considered simultaneously.In this paper

the constant voltage control with wind speed feed forward control is improvedand the reactive power limiting link is added.The joint control strategy of combining the improved constant voltage control and constant power factor on the basis of active prediction layer and the reactive control layer layered processing mode.The joint control dominant factor is calculated in accordance with the active and reactive power magnitude of the actual operation of the fan

and adjust the control strategy according to the change of the joint control dominant factor.The WSCC9 node system model is established by using power system analysis software package（PS ASP）

and the system control strategy is simulated and verified.It is shown by the result that the joint control strategy can ensure not only the stability of the PCC node voltage

but alsothe higher power factor of the unit.