Disturbance-rejecting Method for Half-Bridge Inverters by Hysteresis Current Control

In recent years, digital grid, which is composed of multiple small grids connected asynchronously by Digital Grid Routers (DGR), has been proposed as a new electrical power grid. The DGR consists of multi-functional inverters connected by a common DC bus. This study proposes a disturbance-rejecting method for the output current of the multi-functional inverter in the DGR by using hysteresis current control. The proposed method can suppress not only the harmonic elements of the utility but also the resonance made by suddenly changes of the reference current. The simulation results show good performances of the proposed control method.