Optimization of energy storage scheduling considering variable-type minimum SOC for enhanced disaster preparedness

초록

Recent trends in climate change have led to more frequent extreme weather events, such as typhoons and wildfires. These events pose significant risks to power grids, especially as we increasingly rely on renewable energy sources in the future. To address this, there 's a growing need for strategies ensuring that grids can quickly recover from outages caused by high impact low possibility (HILP) events. Currently, grids use energy storage to maximize economic benefits, but during disasters, this might not suffice to meet high demand, worsening the impact of outages. This paper suggests using energy storage systems like battery energy storage systems (BESS) and hydrogen storage systems (HSS) to proactively store energy, improving grid resilience by maintaining a minimum charge level. Through simulations on an IEEE 123 -bus system with variable energy sources such as photovoltaics (PVs), wind turbines (WTs), and storage, the simulation results show that the proposed variabletype minimum state of charge (SOC) incurs an operating cost loss of 2.5 % to 2.8 % compared to the fixed-type minimum SOC, but provides a power supply capacity improvement of 11.43 % to 18.53 %.

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