Strategy for mitigating curtaliment and operation plan using reused batteries for electric vehicles in Jeju

As Jeju Special Self-Governing Province advances policies to expand the adoption of renewable energy, the issue of power curtailment exceeding the capacity limits of the Jeju power system has emerged. This study analyzes a strategy to mitigate output constraints based on an energy storage system (ESS) using reused batteries from electric vehicles, which is more cost-effective than the existing ESS construction in Jeju, and can also be expected to have the effect of resource recycling by using used batteries recovered from electric vehicles that have reached the end of their life. It also proposes a way to supplement renewable energy variability through this. Jeju Island has the highest electric vehicle penetration rate in Korea, which makes it possible to build an ESS using used batteries. This study examines the operation model and charging/discharging strategy of a reusable battery-based ESS and analyzes the optimal ESS utilization plan to alleviate the curtailment problem. Based on this, we propose a strategy for building an ESS based on reusable batteries for electric vehicles to ensure the stable operation of the power system in Jeju.