Abstract: Virtual coupling relationship between variable-speed wind turbines and synchronous generators will be the key to high-ratio wind power grids to achieve high-efficiency power oscillation suppression. This paper first analyzed the power oscillation characteristics and transfer mechanism when the shaft system of the variable-speed wind turbine and the synchronous generator was in a decoupled, rigid, and flexible coupling relationship. Secondly, the virtual coupling model of the doubly-fed induction generator was established, and a two-degree-of-freedom rotating dynamic model was constructed with the synchronous generator. On this basis, a wind turbine power oscillation suppression method based on flexible virtual coupling was proposed by using anti-resonance theory, and the controller parameters were optimized according to the optimal tuning and fixed point theory. Finally, a wind power high penetration grid simulation system was built to verify that wind turbines can effectively suppress power oscillations under the proposed control strategy, and significantly improve the performance of active support to the grid.