INST ANTANEOUS ACTIVE AND REACTIVE POWER CONTROL IN OFF-GRID SMART HOUSE

Reduction of carbon dioxide emissions is a big challenge for the entire world. Therefore, a residential photovoltaic (PV) system has recently begun to spread and the increasing penetration rate of the renewable energy is expected. However, output power from PV depends on isolation condition and entails uncertainty. So if many PV systems are integrated into the electrical power system, voltage and frequency fluctuation in the power system will occur. Therefore, reduction of PV generation or isolation from the power system is required to the demand side. In this study, the completely off-grid smart house which is not connected with the power system is proposed. In the house, off-grid PV system, storage battery, electrical vehicle (EV), and Home Energy Management System (HEMS) are introduced.