A Quadratic High Step-Up Interleaved Converter with Coupled Inductor for Renewable Energy Applications

This paper presents a high gain DC-DC configuration using coupled inductor and voltage multiplier circuit suitable for PV application. In order to reduce the current stress at the input side, the interleaved configuration is used at the input. The voltage multiplier circuit not only ensures the high voltage gain but also provides an effective clamping of the switch voltage stress. The proposed configuration achieves a high reduction in the switch voltage stress compared to the similar configurations with a high gain structure. The proposed configuration is presented with the comparison of voltage gains, and active switch stress levels across the switches for similar topologies. The converter input current is continuous and due to interleaved configuration along with quadratic boost configuration, the input side inductance is decreased. The various modes of operation of the converter and the simulation results are presented.