Abstract: A mathematic model of doubly-fed induction generator wind energy generation system is established based on dual PWM converters.The voltage fed-forward control scheme of generator side converter and grid side converter are given.The decoupled control of doubly-fed induction generator connected to grid is completed.A simulation model by using MATLAB SIMULINK toolbox is realized to demonstrate the transient effect of doubly-fed induction generator under typical grid faults.The simulation results verify the validity of the model and the feasibility of the control scheme.Finally, the transient analysis under grid faults is given.