Applications of battery energy storage system for wind power dispatchability purpose

In this paper, a dual battery energy storage system (BESS) scheme is adopted to compensate power mismatch between wind power and desired power schedule for dispatching wind power on an hourly basis. The two BESSs are utilized to cope with the positive and negative power mismatch respectively, and the roles of them can be interchanged according to the predefined thresholds on state of charge (SOC). Three hourly indices, entitled as expected wind power curtailment (EWPC), expected wind power deficiency (EWPD) and probability of wind power deficiency (PWPD) respectively, are proposed to evaluate the performance on wind power dispatchability provided by the BESS. Sequential Monte Carlo simulation (SMCS) is utilized to compute the three hourly indices. Finally, simulation results on a real Chinese costal wind farm justify the feasibility of the methodology proposed in this paper.

► We adopt battery as an energy buffer to dispatch wind power on an hourly basis.
► The battery is sized for dispatching wind power with the desired confidence level.
► We design an operational strategy of the battery adopted for dispatchability.
► We propose three indices for assessing performance on wind power dispatchability.
► Simulation on a real wind farm justifies the feasibility of the scheme.