Techno-Economic Assessment of Hybrid Energy Storage System for Grid Resilience: A Case Study

The global transition toward integrating Renewable Energy Sources (RES) into modern power systems has been increasing over the past few decades. However, the intermittent nature of RES introduces significant challenges to grid stability and reliability. Energy Storage Systems (ESS) are used to mitigate these challenges, but a single ESS often fails to simultaneously meet high power demands and long-term energy requirements. This research study proposes a Hybrid Energy Storage System (HESS) configuration to address these limitations by combining a Li-ion battery for high power density for short-term outages and a fuel cell for high energy density for long-term backup for grid resilience using HOMER Pro software. The result showed that the HESS configuration significantly improved the reliability metrics of Loss of Load Probability (LOLP) to 2.91% as compared to 5.21% for the ESS configuration, while maintaining a competitive Levelized Cost of Electricity (LCOE) to enhance renewable-dominated grid reliability by ensuring an uninterrupted power supply during grid outages.