A Novel High Step‐Up Dual‐Switch Quasi‐Z‐Source DC–DC Converter

To stabilize high DC voltage outputs in renewable energy systems such as photovoltaic and fuel cell applications, a novel high step‐up dual‐switch quasi‐Z‐source DC–DC converter is proposed in this paper. Based on the conventional quasi‐Z‐source topology, the design incorporates an additional switching transistor and diode to form a dual‐switch quasi‐Z‐source framework. By integrating a three‐winding coupled inductor with a switched‐capacitor module, the converter achieves high voltage gain under low duty cycles and reduced total turns ratio while enabling flexible gain modulation. Key advantages include continuous input current, low voltage stress on switching components, shared input–output grounding, and enhanced voltage gain. The operational principles, steady‐state performance, and parameter design of the topology are analyzed in detail, with comparative evaluations against existing quasi‐Z‐source DC–DC converters. Experimental validation using a 200‐W prototype confirms the theoretical feasibility and practical performance of the proposed design.