A Single Switch Transformer-Less DC-DC Converter with Continuous Input Current for Photovoltaic Applications.

In this paper, a single switch transformer-less DC-DC converter with continuous input current for photovoltaic applications is proposed. The suggested configuration utilizes a CL1C2D2 structure to achieve a high voltage gain and alleviate voltage stress on the semiconductor components. The voltage gain of the proposed converter is enhanced through a reduction in the turn ratio of the coupled inductor, offering a significant benefit in minimizing the overall size of the converter. The reduction in the turns ratio of the coupled inductor results in lowered voltage stress on the semiconductor elements. Additionally, employing just one power switch in the converter simplifies control and reduces expenses. With its continuous input current, this converter is particularly well-suited for integration in photovoltaic systems. Simulation results conducted using PSCAD/EMTDC software validate the efficacy of the proposed power converter. Furthermore, the maximum power output of the photovoltaic module through an MPPT (Maximum Power Point Tracking) controller under varying irradiance levels is determined, and simulations are executed using PSCAD/EMTDC. [ABSTRACT FROM AUTHOR]