Optimal Configuration of Integrated Energy Storage for Wind Farms Based on Battery Characteristics

To cope with high wind power penetration, a higher requirement for the stability of the regional power grid, where the find farm locates, is put forward. As the key factor to cope with high wind power penetration, the configuration of energy storage is closely related to the final stability of power grid. To solve the problem that it would cause high investment cost because of improving power grid stability by relying on single type of energy storage equipments and it was necessary to consider both the economy and reliability of energy storage, based on the characteristics of different sorts of batteries a configuration scheme of energy storage equipments, which combined the strong power regulation performance of the lithium battery with the high energy storage capacity of the liquid flow battery, was proposed, Based on the technical indices established according to the actual demand and combining with the objective function, in which the average usage cost was minimized, the proposed configuration scheme was solved by immune algorithm, thus a comprehensive configuration scheme of energy storage power and capacity were obtained. Finally, a case-study based on the data of a certain wind farm located in Shandong province was conducted to evaluate the improvement of wind farm output under the proposed energy storage equipment configuration in the proposed scheme to verify the economy and the reliability of the proposed scheme.