Hybrid systems for electrical generation with energy storage

Control of hybrid energy systems in presence of disturbances due to renewable power generators is key issue that must be focused on in order to achieve an optimum power system. Indeed, the questions arise about the preferred configuration to use (AC coupled or DC coupled), the storage devices to adopt, and the control strategy to apply. A hybrid Energy Storage System (ESS) using batteries and supercapacitors (SC) seems to be a good device to answer the second constraint. The objective of the paper is to study the influence of the control strategy for a hybrid ESS using DC coupled configuration and the control strategy for ESS only composed of SC using AC coupled configuration.