In different applications, wind farm model parameters need to modify simultaneously. Nowadays, doubly-fed induction generators are widely used in previous wind farm. Proportional integral controller parameters modification are rarely mentioned in the past paper. To solve the problem, a wind farm model is built in PSCAD/EMTDC simulation environment in this paper. In the model, transient process of doubly-fed induction generator is ignored. Stator flux orientation and grid voltage orientation strategy are used respectively in rotor-side converter and grid-side converter. Direct power control model with SPWM modulation are used in both rotor-side converter and grid-side converter. The controller parameter determination method is based on transfer function. The model can be a resolution on controller parameters modification problem. GE 1.5 MW doubly-fed induction generator parameters are used in the model. Comparing simulation results with that in Matlab/Simulink platform, the controller parameter determination method has got an ideal effect. The output parameters are of certain conformity.