A Review on Hybrid Energy Storage Systems in Microgrids

Energy storages have numerous benefits, for instance, improvement of generation and demand balance, power quality and intermittency of renewable resources. Presently, available energy storage systems (ESS) are inadequate to achieve the desired applications on their own. Hybrid energy storage systems (HESSs) are featured by the combination of two or more energy storage technologies to accomplish the desired results. This paper gives an overview of HESSs applications in microgrids (MGs). Initially, benefits and applications of hybridization have been discussed. Then, a brief comparison of capacity sizing for HESSs is presented. The reviewed methodologies have significant implication in defining HESS capacity in MGs, while considering several constraints such as storage life span, cost and efficiency.