A Novel Dual-Input Single-Output High-Gain DC-DC Converter for Interfacing Fuel-Cell with High-Way Charging Station Applications

This paper presents a novel dual-input single-output high-gain DC-DC converter designed specifically for interfacing fuel-cells (FCs) with high-way charging station applications. The converter boasts several notable features, including high output voltage gain achieved with only two switches, continuous input current, reduced switch stress, and the ability to provide a reliable continuous power supply. The paper elucidates the two operating modes of the converter along with their corresponding switching states. Additionally, it delves into the design and analysis of the proposed converter, covering various aspects such as the development of a state-space model and the derivation of the small signal transfer function to comprehend the dynamic behavior of the converter. Moreover, a suitable control strategy using the k-factor method has been devised to effectively regulate the output voltage and ensure stability, even in the face of input voltage fluctuations. To validate the effectiveness of both the proposed converter and controller, a 150W prototype was meticulously constructed and experimentally verified in a laboratory setting.