用於燃料電池電源系統之雙向直流/直流轉換器

A Bi-directional DC/DC Converter for a Fuel Cell Power System

林立韋(Li-Wei Lin)

指導教授 ： 邱煌仁 ； 楊宏澤

中原大學/工學院/電機工程研究所/博士(2007年)

https://doi.org/10.6840/cycu200700203

摘要

近年來，環保意識的抬頭使得多種潔淨能源如燃料電池、風力和太陽能發電需求增加，在燃料電池及電力電子技術的快速成長下，促使燃料電池電源系統的發展格外受重視。燃料電池具有多項如高輸出電流密度能力、乾淨及高效率等優點，但不同於傳統化學能電池，燃料電池本身不具備儲存能力，當瞬間接載及輸出電流增加情況下，輸出電壓將會快速的下降。因此在電源供應系統應用中，就需要外加一儲能裝置(如鉛酸蓄電池)來提供負載瞬間啟動及儲存能量。而連接其中的雙向式直流/直流轉換器在啟動時需要將儲能電池能量升壓至高壓側匯流排，並且可透過此裝置將匯流排能量回送儲存至儲能電池。本論文所製作之新型雙向隔離直流/直流轉換器具備高效率、架構簡單及低成本等優點，詳細的設計與動作模式均已分析及描述，模擬與實測結果驗證所提出架構之動作原理及效能。
關鍵字：潔淨能源、燃料電池電源系統、雙向隔離直流/直流轉換器、鉛酸蓄電池

關鍵字

潔淨能源 ； 雙向隔離直流/直流轉換器 ； 燃料電池電源系統 ； 鉛酸蓄電池

並列摘要

In recent years, growing concerns about environmental issues have demanded more clean energy sources such as fuel cells, wind turbines, and photovoltaic arrays. The rapid advances in fuel cell technology and power electronics have enabled the significant developments in fuel cell power system. The fuel cells have numerous advantages such as high density current output ability, clean electricity generation and high efficiency operation. However, the fuel cell characteristics are different from that of the traditional chemical-powered battery. The fuel cell output voltage drops quickly when first connected with a load and gradually decreases as the output current rises. The fuel cell also lacks energy storage capability. Therefore in power supply system applications, an auxiliary energy storage device (i.e. lead-acid battery) is always needed for a cold start and to absorb the regenerated energy fed back by the load. In addition, a bidirectional DC/DC converter is also needed to draw power from the auxiliary battery to boost the high-voltage bus during starting. The regenerated energy can be also fed back and stored in the battery using the DC/DC converter. In this dissertation, a high efficiency bidirectional isolated DC/DC converter for fuel cell power systems is studied. The new converter has the advantages of high efficiency, simple circuit and low cost. The detailed design and operation considerations are analyzed and described. Simulation results from the proposed circuit are given to verify the operation principles. A laboratory prototype is also implemented and tested to show its performance.
Keywords: Clean energy source, Fuel cell power system, Bidirectional isolated dc-dc converter, Lead-acid battery

並列關鍵字

Fuel cell power system ； Lead-acid battery ； Clean energy source ； Bidirectional isolated dc-dc converter

參考文獻

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