Abstract: Based on the analysis of the dynamics of the doubly-fed induction generator（DFIG） in each stage of the fault, an equivalent method of DFIG-based wind farm considering the low voltage ride-through（LVRT） control is proposed. First, the LVRT control strategy is discussed, and a method for calculating the fault steady-state power flow of the power system with a DFIG-based wind farm is proposed. Under the consideration of the voltage transient process, the mechanism of changes in the rotor current of the DFIG after the short-circuit fault in the external system is analyzed. It is pointed out that the depth of voltage dip and wind power are the dominant factors affecting the short-circuit current, and the state of the Crowbar can be determined by the operation division line. Then, DFIGs in the wind farm are clustered into 3 groups according to the initial wind speed and the Crowbar state, and the equivalent DFIGs and the collection grid are aggregated. To improve the accuracy of the equivalent model in the recovery stage, the power recovery curve of the DFIG-based wind farm is estimated according to the steady-state voltage of the fault. On this basis, the recovery rate of the equivalent DFIGs is piecewise modified. Finally, equivalent calculations are performed on a case system with a DFIG-based wind farm. The simulation results show that the equivalent model effectively maintains the dynamics of the original system in each stage of the fault, simplifies the system, and improves the calculation speed while maintaining high accuracy.