An energy stored improved Y-source single-phase inverter for photovoltaic system applications

The family of Z-source inverters (ZSI) equipped with battery are able to balance probable fluctuations of photovoltaic (PV) power injected into the grid/load, but their existing topologies have voltage gain limitations, draw discontinuous current from PV panels, and need to use higher battery capacity and PV voltage. This paper proposes a new single-phase topology called Battery Energy Storage Improved Y-Source Inverter (BES-IYSI) to overcome these disadvantages. The operating principles of the proposed topology is analyzed in detail and compared to the existing topologies. In addition, a control scheme is proposed in order to extract maximum power from PV panels, control the injected power into the grid, and manage the power of resources. Simulation results are also presented using the MATLAB/Simulink software, which show the performance of the proposed system.