An Improved Switched-Inductor and Switched-Capacitor Networks-Based High-Step-Up-Ratio DC–DC Converter

Abstract

Achieving higher voltage at load side is essential in many applications, especially in small-scale solar PV systems. Traditional boost converter fails to lift the voltage level beyond five times due to saturation in the passive elements. In order to attain high voltage gain ratio, a novel switched-inductor and switched-capacitor networks-based high-gain step-up converter is proposed in this paper. It can attain higher voltage gain at lower duty ratios, thereby reducing the losses associated with the converter and enhancing the efficiency. The detailed analysis of the proposed converter has been made under the CCM and DCM conditions. Moreover, investigation on device stresses is carried out and the results are compared with recently derived converters. Also, the performance comparison of the proposed converter with other published topologies is presented in this paper. In order to validate the operation details, the measured results are presented and the same have been confirmed with the theoretical approach. Furthermore, experimental works have been carried out and the results are presented to confirm the feasibility of the operation.