ABSTRACT

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%.

摘要

本文提出了一种新型二次升压转换器，具有高电压转换比、高效率和相对较低的电感器电流，使用减少的冗余功率处理和电压提升配置，适用于光伏应用。所提出的二次升压转换器 (QBC) 由更少的元件组成，并在较低占空比下提高了电压增益。此外，还控制电感器和电容器以减少输出电流和电压纹波。清晰地讨论了连续导通模式下转换器的工作模式、稳态分析、设计方面和动态建模。将所提出的 QBC 的性能与现有的不同转换器在元件数量、电压增益、开关元件的电压和电流应力、有效指标、开关器件总功率、和元件损耗。A110W硬件原型已经开发出来。转换器的仿真和实验结果验证了其性能和所述优势。给出了所提出的 QBC 对于各种负载电流的效率曲线，峰值效率为 93.8%。