Family of Capacitor-Diode Network Extended High Gain Quadratic Boost Converters for Microgrid Applications

Recent advancements in dc microgrids demand high-gain dc-dc converters for efficient energy conversion. In this regard, this article proposes a family of five new quadratic boost converters based on the extended capacitor-diode network. All the proposed converters have the ability to produce wide-range voltage gain with continuous source current features, which makes them an interesting choice for microgrid applications. This work conducts a detailed operational, steady-state, and control analysis of the proposed converters. Further, the comparison studies with existing converters highlight the superiority of proposed converters in terms of the high voltage gain, low electric stress, and high switch utilizing factor. Furthermore, 500 W, 400 V, and 50 kHz laboratory prototypes are fabricated to evaluate the practical feasibility, and corresponding experimental results are presented. For the given design, the converter proposed converter (PC) I exhibited a better efficiency of 94.3%, followed by the efficiencies of PC II, PC III, PC V, and PC IV are 93.9%, 94%, 92.5%, and 93.1%, respectively.