Development of Supercapacitor System and Operation Strategy for Frequency Regulation

The increase in renewable energy, which has intermittent high output volatility, can cause instability to grid frequency, and the need for energy storage technology to respond flexibly to the instablility is increasing. Recently, energy storage technology using supercapacitors with improved capacity and advantages such as high output, high-speed response, and long lifespan is being developed. Supercapacitors are attracting attention as energy storage devices suitable for frequency regulation in short-cycle areas with high frequency and short duration. In this paper, we introduced a MW-class supercapacitor system and proposed its operation strategy for frequency regulation.