Design of a wide input range DC-DC converter with a robust power control scheme suitable for fuel cell power conversion
Design of a wide input range DC-DC converter with a robust power control scheme suitable for fuel cell power conversion
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DOI：
10.1109/tie.2007.911200
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发表时间：
2004-09
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影响因子：
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通讯作者：
M. H. Todorovic;L. Palma;P. Enjeti
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文献类型：
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作者：
M. H. Todorovic;L. Palma;P. Enjeti
本文分析和设计了一种宽输入范围的DC-DC转换器，并提出了一种稳健的功率控制方案。所提出的转换器及其控制被设计成与燃料电池电源兼容，该电源具有2：1的电压变化和较慢的暂态响应。该方法由两级组成：传统的Boost变流器级联电流馈电的双电感Boost变流器拓扑，具有较高的电压增益和与输入源的隔离。第一级Boost变换器级的作用是在级联DC-DC转换器的输入端保持恒定的电压，以确保最优的性能特性和高效率。在第一个升压转换器的输出端，连接一个电池或超级电容储能装置，以处理燃料电池的缓慢瞬时响应(200瓦/分钟)。所提出的控制系统的强健特性确保了在各种负载波动时保持恒定的输出直流电压，从而限制了在负载瞬变期间由燃料电池提供的功率。此外，所提出的配置简化了功率控制管理，并且可以与燃料电池控制器进行交互。仿真结果和初步实验结果证实了该系统的可行性。
This paper analysis and design of a wide input range DC-DC converter is proposed along with a robust power control scheme. The proposed converter and its control is designed to be compatible to a fuel cell power source, which exhibits 2:1 voltage variation as well as a slow transient response. The proposed approach consists of two stages: a conventional boost converter stage cascaded with a current-fed two-inductor boost converter topology, which has a higher voltage gain and isolation from the input source. The function of the first boost converter stage is to maintain a constant voltage at the input of the cascaded DC-DC converter to ensure optimal performance characteristics with high efficiency. At the output of the first boost converter a battery or ultracapacitor energy storage is connected to take care of the fuel cell slow transient response (200 watts/min). The robust features of the proposed control system ensure a constant output DC voltage for a variety of load fluctuations, thus limiting the power being delivered by the fuel cell during a load transient. Moreover, the proposed configuration simplifies the power control management and can interact with the fuel cell controller. The simulation results and the preliminary experimental results confirm the feasibility of the proposed system.