Battery-hydrogen vs. flywheel-battery hybrid storage systems for renewable energy integration in mini-grid: A techno-economic comparison

• DOI: 10.1016/j.est.2023.106968
• Publication Date: 2023-03-02T17:42:19Z
• Authors: Dario Pelosi; Arianna Baldinelli; Giovanni Cinti; Dana-Alexandra Ci...; Andrea Ottaviano; Francesca Santori; Federico Carere; Linda Barelli
• Keywords: Flywheel

Decentralized renewables power production is rapidly growing because of environmental concerns. With the purpose maximizing renewable exploitation, energy storage systems integration in Mini-Grids (MGs) needed. Hybrid (HESSs) are promising to obtain enhanced performances terms both capacity and responsiveness, yet their feasibility may be hindered by design management choices impacting economic competitiveness. In this paper, two HESSs analysed compared a real case-study, namely reversible solid oxide cell (rSOC)/Li-ion battery flywheel/Li-ion systems. The analysis here developed handles annual photovoltaic generation electric load actual dataset includes: i) statistical most representative days, ii) dynamic modeling HESSs, iii) simulations define components sizing extrapolate evolution state-of-charge, iv) lifespan assessment through application rainflow cycle counting algorithm, v) detailed evaluation (Levelized Cost LCOE, Levelized cost Storage LCOS sensitivity electricity market price) including subsidies for self-consumption. For performance indexes reduction withdrawal from grid self-consumption increase fixed at about 30 % 70 respectively, with reference features investigated MG. As main outcomes integrated methodology, it appears that rewards (i.e.110 €/MWh) let HESS reach agreeing 2021 average parity. On contrary, more than two-fold rSOC/Li-ion HESS, being equal impact on MG its independence grid. methodology adequate critically reviewing understanding profitability sub-system, insight units.