A simple and effective methodology for sizing electrical energy storage (EES) systems based on energy balance

Kichou, Sofiane, Markvart, Tom, Wolf, Petr, Silvestre, Santiago and Chouder, Aissa (2022) A simple and effective methodology for sizing electrical energy storage (EES) systems based on energy balance. Journal of Energy Storage, 49, [104085]. (doi:10.1016/j.est.2022.104085).

Abstract

The use of the electrical energy storage (EES) plays an important role in the transition of energy generation towards renewable energy sources (RESs). An effective sizing of EES systems is very important in order to cope with the volatility of RESs and to ensure a reliable energy supply. The present paper provides a methodology which helps to determine the minimum required EES size for conceiving a fully standalone system. Its approach is based on the evaluation of the energy balance for a given design period, and it can also be applied for sizing the EES system in grid-connected applications. The methodology was validated using measurement data obtained from two different systems corresponding to: a) a near-zero energy building with local generation sources, and b) a large-scale battery energy storage system (BESS) installed in a factory and used for peak-shaving. The obtained results confirmed the effectiveness of the proposed methodology by estimating the required size of the EES system. A good correlation was found between the estimated and the installed BESS size in the considered systems. The deviation between real and estimated BESS capacities was found to be less than 5%.

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