Dr. Hyoung-Kyu Yang (Advisor: Prof. Jung-Wook Park) in Power System Research Center for Great Energy Transition (PREFER) is selected as the 2021 Research Staff Program supported by National Research Foundation of Korea (NRF) and Ministry of Education. The total grant is about 60M KRW for 1 year (`21~`22). The object of this research is to improve the flexibility of photovoltaic power generation by developing a smart inverter control.