Charge-discharge strategy for battery energy storage to smooth power fluctuations from wind farms

The variable and non-dispatchable characteristics of wind power present great challenges for the security and reliability of power system. Integration a battery energy storage system (BESS) can smooth the fluctuation of wind power effectively. This paper proposes a novel charge-discharge strategy for BESS to limit the wind power fluctuation between two adjacent time intervals. The charge-discharge strategy considers the potential contribution (CSPC) of charging/discharging at the current time interval to the future time intervals during its valid time (Tval). The effectiveness of the charge-discharge strategy has been tested by using actual power out of a wind farm. The results show that the fluctuation of wind power can be improved greatly, and CSPC performs better and more effective than the simple strategy in operation and coordination of energy storage system.