With the continuous development and utilization of wind energy resources

the proportion of wind power in power system increases rapidly. At present

most of wind turbines especially the PMSG have no ability to provide power support when power system oscillates. Therefore

the integration of large scale PMSG will weaken the relative inertia and damping characteristics of the system. To solve this problem

controlling the electronic devices to set up the coupling relationship between PMSG and the system and adding PSS control to enable PMSG to damp the power system oscillations were presented to improve the stability of regional power grid. Finally

a time-domain simulation in four-machine two-area IEEE power system was conducted to indicate the proposed method. Simulation results show that this method is helpful for improving the system inertia and damping ratio of the power system with large wind power integration

and strengthen the ability to damp the power system oscillations.