A power system stabilizing technology is introduced into the wind turbine with a doubly fed induction generator（DFIG）， by use of the slip signal as feedbacks into the rotor side converter control model. During the power oscillation of a power system， a damping active power is injected into the network from the DFIG machine via regulating the rotor excitation voltage angle. This will improve the overall system damping characteristic. A testing system including a wind farm is established in DIgSILENT/Power Factory. The eigenvalue analysis and time response simulation studies are conducted with and without the proposed control model. The results illustrate those wind turbines using the proposed controller can improve the system damping. The power oscillations are restrained and the dynamic stability enhanced.