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Conception et réalisation d'un convertisseur DC/DC à haut rapport de conversion pour électrolyseurs

Abstract : In recent years, the use of electrolyzer to produce cleanly and efficiently hydrogen from renewable energy sources (e.g. wind, solar) has gained growing interest from researchers and industrial. Similarly to fuel cells, electrolyzers require power conditioning systems, such as DC/DC converters. Generally, electrolyzers need a very low DC voltage to generate hydrogen from de-ionized, pure or distilled water. For this reason, DC/DC buck converters are generally used. For electrolyzer applications, DC/DC converters must meet several challenging issues in terms of energy efficiency and output current ripple reduction. Generated high-frequency current ripples from DC/DC converter may lead to long-term degradation on electrolyzers. As a result, high-frequency current ripples can shorten the electrolyzer life span. Furthermore, the availability and reliability of DC/DC converters remain a major concern so that stand-alone power supply can guarantee a high-level of autonomy in case of electrical failures. Within the wind-H2 stand-alone power supply, DC bus is generally a high-voltage of a few hundreds of volt. Given that the electrolyzer must be supplied at a very low DC voltage, interface DC/DC converter has to present a high-conversion ratio.
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https://hal.univ-lorraine.fr/tel-03127387
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Submitted on : Monday, February 1, 2021 - 2:51:26 PM
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Vittorio Guida. Conception et réalisation d'un convertisseur DC/DC à haut rapport de conversion pour électrolyseurs. Energie électrique. Université de Lorraine, 2020. Français. ⟨NNT : 2020LORR0134⟩. ⟨tel-03127387⟩

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