Wind farm dynamic equivalent model should be compared with its detailed model for effect evaluation. RT-LAB simulation platform with powerful computing capability can ensure simulation of large-scale wind farm. A dynamic detailed wind farm model consisting of 48 units of 2 MW doubly-fed induction generators (DFIG) is established on the platform. The motor models and control strategies for idle load grid-connection are studied. Wind farm operating scenarios such as maximum power point tracking (MPPT), power dispatching, grid-connection and cutting-off are simulated. The results show that the model can reflect the dynamic characteristics of the wind farm. It is useful for the evaluation of dynamic equivalent model and the development of wind farm controllers.