Improved Y-source inverter for distributed power generation

In this paper, an improved Y-source inverter with continuous input current has been proposed for distributed power generation. Continuous input current is a promising feature in converters working with renewable energy sources. Low current ripple drawn from renewable energies like fuel cell and photovoltaic systems are always desirable. Furthermore, the need for large input filters in the proposed Y-source inverter has been eliminated. Principals and analysis of the improved Y-source inverter have been discussed and corresponding equations have been derived. Computer simulations using PSIM software have been done to validate performance of the proposed inverter in photovoltaic systems. It is shown that all theoretical expressions are in accordance with the simulation results.