Analysis and Design of transformer less Single Switch based High Gain DC-DC Converter for Renewable Energy Applications

Abstract

Conventional boost converters have limited gain with high duty ratios, high voltage stress on semiconductors, and high current ripples leads to increase in power loss and efficiency depreciation. This leads to restrict traditional boost converter in many industrial applications. A battery-grid connected non isolated single switch high gain DC-DC (SSHGDC) converter is proposed in this paper to attain high voltage conversion ratio within limited duty ratio. The SSHGDC converter is proposed with single switch and limited number of passive elements compared to existing converters. As only one switch present in design of this converter it reduces current and voltage stress across MOSFET and further reduces switching losses. In addition, it reduces current ripples, power losses and it leads to restrict electromagnetic interferences. The advantages of proposed converter along with comparative analysis with existing topologies is tabulated in this paper. Operating principle and steady-state analysis along with design considerations and simulation results were presented.