Strategy of Smoothing Wind Power Fluctuation Based on H-P filtering Method

Advances in battery energy storage technology have provided new ideas for smoothing wind power fluctuations. However due to the high cost, battery energy storage cannot be configured on a large scale in power systems. By applying the H-P filtering method, the time-varying wind power fluctuation can be decomposed into long-term trend component parts and short-term fluctuation component parts. A coordinated control method is proposed in this paper that the long-term trend component parts of wind power fluctuations are stabilized by thermal power units while short-term fluctuation component parts are suppressed by battery energy storage systems (BESS). Thereby avoiding frequent regulation of the thermal power units and saving the capacity requirement of the BESS. Finally, the effectiveness of the proposed strategy is verified based on the PSCAD/EMTDC simulation model. The simulation results indicate the feasibility and advantage of the proposed coordinated control method.