THREE-PHASE EXPANDABLE AC SYSTEM BASED ON BATTERY RECONFIGURATION AND CONTROL METHOD THEREOF

A three-phase expandable AC system based on battery reconfiguration and a control method thereof are provided. The system includes a reconfigurable battery array capable of connecting to a load or being tied to a grid, and having a plurality of battery array modules. The reconfigurable battery array may perform charging or discharging with respect to the load or the grid, and may perform one of operations including: generating a single-phase AC voltage corresponding respectively to outputs of the battery array modules; generating a three-phase AC voltage corresponding to three battery array modules selected from the plurality of battery array modules; and generating a plurality of three-phase AC voltages in parallel from the plurality of battery array modules, and merging the three-phase AC voltages in parallel to scale power.