Abstract
Recently, the use of electrolyzers for hydrogen production through water electrolysis is of great interest in the industrial field to replace current hydrogen production pathways based on fossil fuels (e.g. oil, coal). The electrolyzers must be supplied with a very low DC voltage in order to produce hydrogen from the deionized water. For this reason, DC-DC step-down converters are generally used. However, these topologies present several drawbacks from output current ripple and voltage gain point of view. In order to meet these expectations, interleaved DC-DC step-down converters are considered as promising and interesting candidates to supply proton exchange membrane (PEM) electrolyzers. Indeed, these converters offer some advantages including output current ripple reduction and reliability in case of power switch failures. In addition, over the last decade, many improvements have been brought to these topologies with the aim to enhance their conversion gain. Hence, the main goal of this paper is to carry out a thorough state-of-the-art of different interleaved step-down DC-DC topologies featuring a high voltage gain, needed for PEM electrolyzer applications.
Highlights
THE random behavior of the renewable energy sources (RES) makes the hydrogen production and storage an engaging and efficient solution
The first advantage of the stacked interleaved topology is that it allows a full suppression of the output current ripple whatever the duty cycle values, reducing the needed phases to two
The main objective of this paper is to carry out a thorough literature survey focused on candidate interleaved step-down converters for proton exchange membrane electrolyzer applications
Summary
THE random behavior of the renewable energy sources (RES) makes the hydrogen production and storage an engaging and efficient solution. Many interleaved step-down topologies have been proposed in the scientific literature [9,10,11,12,13,14,15,16], bringing improvements (e.g. energy efficiency optimization, output current ripple minimization, and availability in case of electrical failures) compared to the conventional interleaved step-down converter As it has been mentioned earlier, ELs must be supplied with a very low DC voltage; so interleaved DC-DC step-down converters are suitable for this type of applications. TRANSACTIONS ON ENVIRONMENT AND ELECTRICAL ENGINEERING ISSN 2450-5730 Vol 3, No 1 (2019) © Vittorio Guida, Damien Guilbert, Bruno Douine Starting from these observations, the main purpose of this work is to carry out a thorough literature survey focused on the family of interleaved DC-DC step-down converters featuring a high voltage gain.
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