Operation Strategy of Multi-Energy Storage System for Ancillary Service

Abstract

Energy storage systems (ESSs) used for ancillary purposes in power systems have different capacities and output characteristics, and so need to be scheduled and operated together based on their state of charge (SOC) rather than individually. This paper proposes a simple but effective method for properly allocating energy in a multi-ESS used for spinning reserve. Through different case studies, it is shown that power demands are more effectively distributed across each ESS using the newly proposed allocation method.