A Single Switch High Voltage Gain DC-DC Converter Based on Coupled Inductor and Switched-Capacitor for Renewable Energy Systems

In this paper, a single-switch high voltage gain DC-DC converter for DC bus regulation in various low voltage level sources, especially photovoltaic system is proposed. In this converter, coupled inductor and switched-capacitors are used to achieve high voltage gain. Also, only an active switch is used. Meanwhile, using a clamp capacitor the energy stored in the leakage inductance of the coupled inductor is recycled, which results improved efficiency. Operating principles and operating mode analysis are discussed for both continuous conduction mode (CCM) and discontinuous conduction mode (DCM). Also, boundary condition mode (BCM) is calculated. Finally, the simulation results confirm the correct performance of the proposed converter.