Abstract: The ripple of the DC bus capacitor in double-fed wind power converters poses a threat to the safe operation of the system. This study establishes the coupling relationship between power pulsation and ripple current through mechanism analysis, revealing that the second slip frequency component dominates the ripple characteristics. Based on this, a collaborative suppression architecture combining model predictive control and resonant control is designed. Experiments show that this approach overcomes traditional physical limitations, achieving a ripple suppression rate exceeding 96%, a dynamic response speed improvement of 60%, and additional losses below 1%. This provides core technical support for highly reliable wind power systems.