As a kind of new energy power generation technology in the 21st century, hydrogen fuel cell plays an indispensable role in energy network. However, due to its characteristics of low output voltage and large fluctuation, direct current–direct current (DC–DC) converter with high step-up voltage gain has become a key part for safe and stable operation of fuel cell. In this paper, by replacing the inductors on the input side of interleaved boost converter with switched-inductor units (small current ripple) and adding a capacitor–diode unit with strong voltage multiplication to the output side, an innovative interleaved high step-up DC–DC converter is proposed with high step-up voltage gain, small inductor current, and low voltage/current stresses. In addition, working principle, steady-state performance, device parameter design, and theoretical efficiency calculation for the entire duty cycle range (duty cycle D < 0.5 and D > 0.5) are carried out, respectively, to verify its validity and feasibility. Finally, a 150-W experimental prototype of fuel cell front-stage power conversion is established. When the input voltage and output current are 16 V and 1.25 A, respectively, the efficiency of the entire system can reach about 92.6%.

中文翻译：

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一种用于氢燃料电池动力系统的具有开关电感器/电容器-二极管单元的创新型交错式高升压直流-直流转换器

氢燃料电池作为21世纪的一种新能源发电技术，在能源网络中扮演着不可或缺的角色。然而，由于其输出电压低、波动大的特点，具有高升压增益的直流-直流（DC-DC）转换器已成为燃料电池安全稳定运行的关键部件。本文通过用开关电感单元（小电流纹波）代替交错式升压转换器输入侧的电感，并在输出侧增加一个具有强电压倍增的电容-二极管单元，一种创新的交错式高升压直流– DC 转换器具有高升压增益、小电感电流和低电压/电流应力。此外，工作原理、稳态性能、器件参数设计、D  < 0.5 和D  > 0.5) 分别进行，以验证其有效性和可行性。最后，建立了150W燃料电池前级功率转换实验样机。当输入电压和输出电流分别为16 V和1.25 A时，整个系统的效率可达92.6%左右。