Optimal Allocation Method of Hybrid Energy Storage Capacity to Stabilize Wind Power Fluctuation

This paper proposes an optimal allocation method for hybrid energy storage capacity to stabilize wind power fluctuation, taking into account the power fluctuation caused by connected wind power to the power grid and the optimization of hybrid energy storage capacity. Firstly, the original power of wind power is decomposed using variational mode decomposition (VMD). The grid-connected power and the compensation power of the hybrid energy storage system are obtained respectively based on satisfying the power fluctuation requirements. Secondly, by considering the state of charge and charge and discharge power constraints of energy storage, we establish a full life cycle cost model for the hybrid energy storage system. We then complete the optimal capacity allocation of the hybrid energy storage system with the aim of achieving economic optimization. Finally, an example is presented to validate that the configuration method proposed in this paper can stabilize power fluctuations and enhance the economy of the hybrid energy storage system (HESS).