High step-up continuous input current LCCT-Z-source inverters for fuel cells
High step-up continuous input current LCCT-Z-source inverters for fuel cells
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用于燃料电池的高升压连续输入电流 LCCT-Z 源逆变器
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
H. Abu
中科院分区：
文献类型：
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作者：
M. Adamowicz;J. Guzinski;R. Strzelecki;F. Peng;H. Abu
z源逆变器（zsi）适用于需要大范围电压增益的应用，例如燃料电池。本文扩展了zsi的概念。提出了一种新型燃料电池专用高升压lcct - z源逆变器。与最近提出的基本z源逆变器的改进方案相比，新拓扑具有可用的连续输入电流、提高升压比和简单的拓扑结构等优点。由于采用了大于1匝比的变压器，与ZSI相比，lcct - z源具有更低的通射比和更高的调制指数。两个内置的直流阻塞电容器与变压器绕组串联在一起，防止变压器铁心饱和。仿真和实验结果验证了所提拓扑的可靠性。
Z-source inverters (ZSIs) are suited for applications which require a large range of voltage gain, such as in fuel cells. The present paper extends the concept of ZSIs. New type high step-up LCCT-Z-source inverter dedicated for fuel cells is proposed in the paper. Compared to recently proposed modifications of basic Z-source inverter the new topology has the advantages of available continuous input current, improved boost ratio and simple topology. Thanks to application of transformer with turns ratio higher than one the proposed LCCT-Z-source can operate with lower shoot-through ratio and higher modulation index compared to ZSI. The existence of two built-in DC-current-blocking capacitors connected in series with transformer windings prevents the transformer core from saturation. Simulation and experimental results are provided to verify the reliability of the proposed topology.