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This paper studies the use of static synchronous compensator (STATCOM) for wind farms integration based on DFIG, and proposes a reactive power cooperative control strategy for the wind farm combined with STATCOM. A whole dynamic model for variable-speed constant-frequency wind energy system and the STATCOM are established in the PSCAD/EMTDC environment. On the basis of this model, the reactive power limit of DFIG wind power generation system based on the power relationships of overall system is calculated. Then optimization cooperative control strategy of the DFIG is proposed. Finally, simulation studies are carried out to examine the dynamic performance of the PCC with and without STATCOM. Results show that the wind farm with STATCOM cooperative compensate control strategy optimizes the reactive power and improves the dynamic performance of the wind farm when the system is in fault.