Comparative Studies on High-Power Density and Light-Weight Step-Up DC-DC Power Converter for Hydrogen-Fuel-Cell Hybrid System

2022 IEEE 21st Mediterranean Electrotechnical Conference (MELECON) Pub Date : 2022-06-14 DOI:10.1109/MELECON53508.2022.9843075

S. Ryu, H. Lee, C.B Park, J. Lee, J.C Kim, D. Kim, J. Lim

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引用次数: 1

Abstract

Recently, the railway and electric vehicle (EV) propulsion system, based on the energy-efficient hydrogen-fuel-cell (HFC) and battery, has attracted attention. Due to the high price of the HFC, it is difficult to directly supply the high DC voltage of the inverter for driving the traction motor, a step-up DC-DC converter is required between the HFC and the inverter. However, HFC hybrid railway system has more limited space and weight compared with the general railway system, due to the additional space of hydrogen-fuel-cell and battery. As a result, a step-up DC/DC converter with high-power-density and light-weight is required. This paper describes a propulsion system for the HFC railway system and reviews step-up DC-DC converters suitable for high-power density and light-weight through various analyses. By selecting interleaving control and combination resonant LLC and 3-level buck converters with ‘parallel-input, series-output, and modular structure’ as step-up DC/DC converters, a new DC/DC converter suitable for high-power density and light-weight is proposed through their ripple analysis of input current/output voltage, design, efficiency, and volume. Finally, their operation and parameter design are verified by the PSIM simulation.

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氢燃料电池混合动力系统高功率密度和轻重量升压DC-DC功率变换器的比较研究

最近，基于节能氢燃料电池(HFC)和电池的铁路和电动汽车(EV)推进系统引起了人们的关注。由于HFC的价格较高，很难直接供给逆变器的高直流电压来驱动牵引电机，需要在HFC和逆变器之间进行升压DC-DC变换器。然而，由于氢燃料电池和电池的额外空间，HFC混合动力铁路系统与一般铁路系统相比，空间和重量更有限。因此，需要一种具有高功率密度和轻质的升压DC/DC变换器。本文介绍了一种用于HFC铁路系统的推进系统，并通过各种分析对适用于高功率密度和轻量化的升压DC-DC变换器进行了评价。选择交错控制组合谐振LLC和“并联、串联、模块化结构”的3电平降压变换器作为升压DC/DC变换器，通过对输入电流/输出电压纹波分析、设计、效率和体积等方面的分析，提出了一种适合于高功率密度和轻量化的新型DC/DC变换器。最后，通过PSIM仿真验证了它们的工作原理和参数设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2022 IEEE 21st Mediterranean Electrotechnical Conference (MELECON)

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