Control methods for power storage devices in distributed power system

Recently, energy policies have been adopted by various countries around the world to realize a low oxygen society. Attention has been paid to self-sufficient smart home technologies to reduce energy consumption. Power storage devices integrated into photovoltaic power generation devices have been introduced in smart homes. Such power storage devices are mainly used to decrease power peaks and shift peak loads in addition to providing emergency power supply. However, how to discharge the power storage device is not considered much. Furthermore, it has been reported that the service life of power storage devices depends on their operation method. In this study, we propose a control method of power storage system used for grid system for distributed power supply and investigated the characteristics of power storage device in each control method. The experimental results show that the tested discharge control method is operated without putting a heavy burden on the electricity storage device.