Optimal configuration of ESS requirements for stable VRE integration; a case study of Korea

Renewable energy is one of the most important carbon-free resources for energy transition and net-zero goal. To reduce carbon emission, Korea has planned to supply variable renewable energy focusing on photovoltaic and wind. However, solar or wind energy is inherently resources with high variability and uncertainty depending on weather conditions such as solar radiation and wind speed. Korea has an island system without an electrical interconnection with neighbouring grids, which is expected to have more difficulties with issues about renewable energy compared to other countries. Accordingly, it is necessary to prepare comprehensive countermeasures for expanding renewable energy, in order to stably integrate renewable energy into the power system. Since Korea has considered energy storage system as a key technology and established a plan to expand it, it is important to arrange an optimal plan for energy storage system.