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Inductor-capacitor gain cell-based non-isolated high step-up converter for DC microgrid
One-line summary
A solar energy research paper on Inductor-capacitor gain cell-based non-isolated high step-up converter for DC microgrid.
Engineering notes
Engineering notes will be added by the Power for Solar editorial team.
Chinese explanation / 中文解读
中文解读待补充：本站会优先为光伏效率、钙钛矿太阳能电池、储能技术、太阳能热利用、BIPV、并网技术等高价值论文补充中文说明。
Original abstract
In this paper, a high-gain DC-DC converter with an ultra-step-up voltage gain value of 20 is introduced. The proposed converter is synthesized using two stages - stage 1 yields a voltage gain which is double that of a classical boost converter (CBC) and stage 2 employs an inductor-capacitor gain cell (ICGC) to obtain a quadratic voltage gain function. Since a voltage gain extension technique is employed, the voltage stress on the switches in stage 1 is significantly reduced. The proposed gain extension hypothesis is experimentally validated through a 20 V to 400 V, 200 W prototype converter that operates at 94.5% full-load efficiency. The proposed converter regulates the output voltage to 400 V over a wide range of input voltage and load current variations with minimal overshoots and undershoots. Further, the maximum voltage stress on two switches switch is only 10% of the output voltage. Due to the interleaved mechanism employed in stage 1, the input current is smooth and ripple-free. Based on the comparison with several state-of-the converters, the unique advantages of the proposed converter are clearly validated and found suitable for DC microgrid application.
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