Direct sizing and characterization of Energy Storage Systems in the Energy-Power plane

Abstract

This paper presents an original sizing method for Energy Storage Systems (ESS) based on directly matching their Energy and Power (EP) capabilities with the EP demand. Starting from the system requirements and from an energy management strategy the demanded power is calculated. The objective is to size the ESS such as its power and energy capabilities are not exceeded by both power and energy demanded. Comparison between different technologies of Energy Storage Devices (ESD) is possible using this energy vs power Safe Operation Area (SOA) characterization. Special attention should be paid to comparing specific SOA across devices. Diverse energy management strategies can be synthetized in the EP plane where they can be compared and analyzed. The sizing method converges extremely fast and is a suitable to integrate it in an optimization loop. The method allows to determine directly and efficiently which technology and which sizing are the most appropriate (in terms of indicators such as mass or cost) to a certain EP demand.<br /><br />