Abstract—If a wind farm is weakly connected to a power grid,

then the voltage of the connection point fluctuates frequently

due to the changeable wind speed. The active and reactive power

of a doubly-fed induction generator (DFIG) can be decoupling

controlled and the grid-side converter (GSC) of a DFIG can also

generate some reactive power by adjusting the power factor,

thus a DFIG can be considered as a reactive power resource to

stabilize the voltage of the connection bus.