An approach in dual-control of battery energy storage systems in windfarm output power smoothing

Intermittent nature of wind power impacts negatively on power system stability, reliability and power quality. These phenomenon challenges the large-scale wind power integration to the electric grid. The Battery Energy Storage System (BESS) can contribute to the mitigation of the intermittency behavior of wind power output, which provides added benefit in large-scale integration of wind farms. This paper proposes a dual control strategy of BESS for Doubly Fed Induction Generator (DFIG) based wind farm output power smoothing to provide nearly constant power at wind farm's output terminal. Dual control of two-stage BESS charging/discharging allows regulating the wind farm power to be as smooth as possible.