On the basis of double battery energy storage systems (BESSs), a new control strategy is proposed to smooth fluctuating components of wind power and improve output characteristics of wind farm. It is based on the current control strategy and the effect of wind power fluctuations in future which can affect the charge and discharge behavior of BESS what can be taken into account. Double BESSs charge or discharge according to policy requirements, once any BESS arrives at its state of full charging or discharging, two BESSs switch their states immediately. The new control strategy reaches to dynamic control with wind forecast and rolling optimization. Practice shows that the new control strategy not only achieves good stabilizing effect in wind power output characteristics but also reduces instant power fluctuations because of insufficient storage capacity. It can reduce battery charge and discharge times and extend battery life because of using double BESSs. This work is supported by National Natural Science Foundation of China (No. 51407097), The 12th Fund Project of Jiangsu “Six Talents Summits” Plan (No. 2015-ZNDW-009), and Natural Science Foundation of Jiangsu Universities (No. 16KJB470014).