This study presents a family of novel high gain non-isolated hybrid dc–dc converter for dc micro grid application. The proposed family of the converter is developed by employing both inductor-capacitor-inductor (LCL) based switched inductor (SI) and switched capacitor (SC) technique to achieve high voltage gain. Appropriate increase in the number of LCL-based SI cells in the power circuits in order to achieve ultra-high voltage gain allows formulating a generalised structure of the circuit. Incorporation of SI & SC techniques and the structure of the circuit with one stage power transfer ensure high voltage gain at low voltage stress across the switches and diodes. The study includes the principle of operation, steady-state analysis and performance analysis in detail for the converters. Experimental results from the developed hardware prototype of 380 V/250 W validate the adopted concept, design and exemplify that the proposed family of converter operates at a full load efficiency of 94%.

中文翻译：

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具有开关电感器和开关电容器单元的模块化，可扩展，高增益DC-DC转换器系列

这项研究提出了一系列适用于直流微电网应用的新型高增益非隔离混合式dc-dc转换器。通过采用基于电感器-电容器-电感器（LCL）的开关式电感器（SI）和开关式电容器（SC）技术来实现高电压增益，可以开发出该转换器系列。为了实现超高电压增益，电源电路中基于LCL的SI单元的数量适当增加，就可以制定一种通用的电路结构。将SI＆SC技术与具有一级功率传输的电路结构相结合，可确保在开关和二极管两端的低压应力下获得高电压增益。研究内容包括转换器的工作原理，稳态分析和性能分析。