Quadratic Boost DC-DC Converter with High Step-Up Ability for Solar PV Application

Quadratic Boost Converters (QBC) has merged as the proficient solution, which provides high step-up dc output from a low dc voltage. Significant circuit modification in QBC as proposed in recent-art topologies with QBC combination requires higher number of components to achieve very high step-up output. To address the shortcomings of the existing structures, a novel QBC with Switched Capacitor (SC) utilizing a single switch is proposed in this work. Two inductors, four capacitors and five diodes are required to step-up the voltage to almost 750 V from a 48 V dc source at 0.65 duty cycle. A detailed analysis is conducted on the proposed converter’s functioning in both continuous and discontinuous modes. The performance of the proposed converter is analyzed with respect to design of components and stress across all the components. Power losses are evaluated in detail considering the parasitic elements. Simulation and detailed analytical results are acquired to justify the feasibility of the proposed converter.