Effect of Converter Topology on the Specific Energy Consumption of Alkaline Water Electrolyzers
Koponen, Joonas; Ruuskanen, Vesa; Kosonen, Antti; Niemelä, Markku; Ahola, Jero (2018-10-17)
Post-print / Final draft
Koponen, Joonas
Ruuskanen, Vesa
Kosonen, Antti
Niemelä, Markku
Ahola, Jero
17.10.2018
IEEE Transactions on Power Electronics
IEEE
School of Energy Systems
Kaikki oikeudet pidätetään.
© 2018 IEEE
© 2018 IEEE
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2018102938976
https://urn.fi/URN:NBN:fi-fe2018102938976
Tiivistelmä
Water electrolysis will be used to produce renewable hydrogen for energy storage and Power-to-X applications in the future renewable-energy-based energy systems. Therefore, the energy efficiency of hydrogen production will probably become a major issue. In this study, the effect of practical supply power converters on the specific energy consumption ofMW-scale alkaline electrolyzers is studied and compared with an ideal DC power supply. The current quality and the stack specific energy consumption are studied in the case of traditional thyristor rectifiers and a transistor-based converter. The stack specific energy consumption is analyzed based on the simulated current waveforms and the electrical equivalent circuit of the electrolyzer stack. It is found that the transistor-based converter offers up to 14% lower electrolyzer stack specific energy consumption than the 6-pulse thyristor rectifier and up to 9.2% lower electrolyzer stack specific energy consumption than the 12-pulse thyristor rectifier as the current varies between 5000A and 1000A. The simulated change in the stack specific energy consumption of the MW-scale alkaline water electrolyzer outweighs the losses occurring in the rectifiers. Further, selection of the AC voltage level may have a more adverse effect on the stack specific energy consumption with the thyristor rectifier topologies compared with the transistor-based topologies.
Lähdeviite
Koponen, J., Ruuskanen, V., Kosonen, A., Niemelä, M., Ahola, J. (2018). Effect of Converter Topology on the Specific Energy Consumption of Alkaline Water Electrolyzers. IEEE Transactions on Power Electronics. DOI: 10.1109/TPEL.2018.2876636
Alkuperäinen verkko-osoite
https://ieeexplore.ieee.org/document/8494794Kokoelmat
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