Abstract: Aiming at the problems of low fault tolerance, the grid-connected inrush current is large, complex controller parameter adjustment and slow dynamic response of grid-side converters of traditional doubly fed induction generators (DFIG), a three-phase four-switch converter was studied. And a triple deadbeat control strategy is proposed.Compared with the hatraditional six-switch structure, the three-phase four-switch topology reduces the number of switches, reduces switching losses, and improves equipment fault tolerance.In addition, this paper focuses on the working principle and mathematical model of the topology, and proposes a triple deadbeat control strategy.In this control strategy, the two capacitor voltage controllers on the DC side and the current inner loop controller all adopt digital deadbeat control, which realizes the balance of the capacitor voltage on the DC side, greatly improves the dynamic performance of the system, and the parameter design is simple and easy to implement in engineering.Finally, the correctness and effectiveness are verified by PSIM6.0 simulation.