A coupled inductor based high gain Z source DC DC converter with low voltage stress on switches for solar PV applications

To attain a high voltage gain between the source and the load, source-impedance networks are employed. Unlike the first suggested topologies without magnetically connected inductors, magnetically coupled source-impedance networks are suggested to obtain higher voltage gain with a shorter transition time. This work proposes a new, non-isolated, high-gain, and highly efficient DC-DC converter that uses active linked inductor impedance source to boost a solar panel's output power. An ideal switching pulse generator and coupled inductors are used in the suggested structure to boost the voltage gain. In the meantime, the suggested converter exhibits a low duty ratio and large voltage gain. Because it is used in the first input voltage stage, the switch voltage strains are also lessened. Efficiency is raised and conduction losses are decreased by using low voltage switches and minimal on-state resistance since the switch voltage stresses are lower than the output voltage. The usage of a π-like transformer connection type has also produced a very high gain in this converter. The performance of the suggested converter has been verified using simulations conducted with MATLAB/Simulink. In order to get the transformer coefficients, the Starfish optimization technique was also used to optimize the suggested circuit. According to the simulation results, the suggested converter can be used with photovoltaic systems and other renewable energy source applications.