A DC-DC Converter with Multistage Boost Input and High Voltage Gain for Solar PV Applications

This research paper presents a grid-connected DC/DC converter with multiple inputs, emphasizing a substantial voltage gain and non-isolated operation. The structure can accommodate a number of input stages and allows independently performing the MPPT function and power sharing. Since a higher voltage increase is obtained in the offered converter with more input sources, there will be no need to connect solar modules in series or parallel to achieve higher voltage and power ratings. The converter inherently offers higher reliability. The converter also draws current with minimal ripple for inputs, which is preferred by solar PV systems. These properties allow using this converter as a suitable and high-quality converter for high power to connect solar PV energy sources to distribution network.