The access of large-scale wind power seriously threatens the safe and stable operation of the power system. In this paper, a novel energy function based transient stability analysis approach is proposed for the power system integrated with Double Fed Induction Generator (DFIG). First, the network structure-preserving model of power system integrated with DFIG is established, where generators adopt 3th order electromechanical model, and its energy function is deduced. Next, the energy function of post-fault system is approximately calculated by trapezoidal integral path, and energy function based transient stability criteria are put forward to access the stability of the post-fault system. Finally, the New England-39 bus system integrated with DFIG is used as test system to investigate the validity of the proposed approach.

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