グリッド柔軟性と再生可能エネルギー統合のためのセカンドライフ電池

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:セカンドライフ電池の系統連系ストレージとしての経済性評価手法（二段階MILP）と、その感度要因を理解できる。

🏢実務担当者:EV電池リユース事業や蓄電池導入の投資回収条件を検討する際の評価フレームとして活用可能。

🏛政策担当者:再エネ統合と資源循環を両立する蓄電池政策（リユース促進、系統用蓄電池への支援）の設計に示唆。

The increasing penetration of renewable energy sources in modern power systems introduces significant operational and economic challenges, since solar and wind generation are inherently variable and only partially dispatchable. Their fluctuating output may contribute to network congestion, frequency stability issues, and increased electricity price volatility. In this context, Battery Energy Storage Systems (BESS) represent an important source of flexibility, enabling services such as energy time-shifting, frequency and voltage support, congestion mitigation, and energy arbitrage. At the same time, the rapid diffusion of electric vehicles (EVs) is expected to generate a substantial number of end-of-life traction batteries in the coming years. Although these batteries are no longer suitable for automotive applications, they typically retain 70–80% of their original capacity and may therefore still provide valuable performance for stationary storage applications. This paper investigates the technical and economic potential of second-life batteries, compared with conventional first-life BESS technologies, for grid-connected storage systems, renewable energy integration, microgrids, and behind-the-meter applications. To this aim, a two-stage mixed-integer linear programming (MILP) framework is proposed. In the first stage, the optimal charging and discharging schedule of the BESS is determined using historical load, renewable generation, and electricity market data. In the second stage, the Net Present Value (NPV) of the investment is maximized in order to identify the optimal storage sizing configuration. The proposed methodology is validated through a real case study including photovoltaic generation, electrical loads, and battery storage. The results show that the economic viability of second-life batteries strongly depends on factors such as the cost difference with respect to first-life batteries, the residual state of health, and the revenues achievable through services including arbitrage, peak shaving, and flexibility support. The paper highlights the conditions under which second-life batteries can represent a technically feasible and economically attractive solution for stationary energy storage applications.

• Zenodo https://zenodo.org/records/23055405first seen 2026-10-09 04:13:10 · last seen 2026-10-10 04:16:22