A Novel DC–DC Converter for Electrolyzer With Low Ripple and High Step Down

Electrolyzers are widely used in renewable energy hydrogen production, and the performance of electrolyzers is directly related to dc–dc converters. To realize the high-efficiency operation of the electrolyzer, new challenges, such as a high step-down ratio and low output current ripple, are put forward for the dc–dc converter. In this article, we propose a novel type of dc–dc converter for hydrogen production. The topology is simple and has the advantages of higher step-down gain and low switching stress. In addition, the scheme can achieve ultralow output current ripple without active devices. Finally, the topology connects the electrolyzer hydrogen production load in the experiment to verify the scheme's effectiveness.