A non-cascading DC/DC quadratic boost converter with high voltage gain for PV applications

This paper proposed a new quadratic boost converter featuring a high voltage conversion ratio, high efficiency, and comparatively low inductor currents using reduced redundant power processing and voltage lift configurations for PV applications. The proposed Quadratic Boost Converter (QBC) consists of fewer components and improves voltage gain at a lower duty cycle. Furthermore, the inductor and capacitor are controlled to reduce output current and voltage ripples. The operational modes, steady-state analysis, design aspects, and dynamic modelling of the converter in continuous conduction mode are discussed clearly. The performance of the proposed QBC is compared with different existing converters in terms of component count, voltage gain, voltage and current stress of the switching components, effective index, total switching device power, and component losses. A110W hardware prototype has been developed. The simulation and experimental results of the converter validate its performance and stated benefits. The efficiency curves for the proposed QBC for various load currents are presented, with a peak efficiency of 93.8%.