Design and dynamic power management of energy storage system for wind plant

To integrate wind energy into power grid, energy storage system (ESS) is needed to smooth out fluctuations of wind power output. As power and energy requirements for energy storage in wind application are high, ESS cost is high. In this paper, selection of storage technologies and sizing of storage units in ESS to achieve high power, high energy capacity and low cost are presented. A Dynamic Power Manager is introduced for management of power dynamics and constraints of energy storages inside ESS, while improving controllability of wind plant at PCC. Simulation result shows that the Dynamic Power Manager is effective to manage the ESS and improve power at PCC with RMS ripple down from 17.97 % to 6.42 %.