WO2026037572 - ELECTROLYSIS PLANT AND METHOD FOR OPERATING AN ELECTROLYSIS PLANT
National phase entry is expected:
Publication Number
WO/2026/037572
Publication Date
19.02.2026
International Application No.
PCT/EP2025/070362
International Filing Date
16.07.2025
Title **
[English]
ELECTROLYSIS PLANT AND METHOD FOR OPERATING AN ELECTROLYSIS PLANT
[French]
INSTALLATION D'ÉLECTROLYSE ET SON PROCÉDÉ DE FONCTIONNEMENT
Applicants **
SIEMENS ENERGY GLOBAL GMBH & CO. KG
Inventors
BURATCKII, Artem
BENDIG, Marvin
LOKU, Fisnik
SCHUMANN, Sven
Priority Data
24194170.7
12.08.2024
EP
Application details
| Total Number of Claims/PCT | * |
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| Number of Multi-Dependent Claims | * |
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International Searching Authority |
EPO
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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* The data is based on automatic recognition. Please verify and amend if necessary.
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2340 | |
| EPO | Filing, Examination, Granting | 11719 | |
| Japan | Filing, Examination, Granting | 2357 | |
| South Korea | Filing, Examination, Granting | 2412 | |
| USA | Filing, Examination, Granting | 4940 |
Total:
23,768
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Abstract[English]
The invention is related to an electrolysis plant (1) comprising an electrolyser (3), a transformer unit (21) and a rectifier (15a, 15b). The transformer unit (21) comprises a transformer (9,11) and an autotransformer arrangement (19) for receiving power from a grid (25) to supply the electrolyser (3) with electrolysis current. The autotransformer arrangement (19) comprises a first autotransformer (19A) and a second autotransformer (19B) electrically coupled in series so that the first autotransformer (19A) is arranged upstream of the second autotransformer (19B) with its terminals (43) connected to the grid (25) and equipped at its primary winding (39) with a bypass switch (SI) and an step-up switch (S2).The electrolysis plant (1) is enabled to perform a Low-Voltage-Ride-Through (LVRT) operational mode. The invention is further related to a method for operating an electrolysis plant (1), particularly in a LVRT operational mode.[French]
L'invention concerne une installation d'électrolyse (1) comprenant un électrolyseur (3), une unité de transformateur (21) et un redresseur (15a, 15b). L'unité de transformateur (21) comprend un transformateur (9, 11) et un agencement d'autotransformateur (19) destiné à recevoir de l'énergie provenant d'un réseau (25) afin d'alimenter l'électrolyseur (3) en courant d'électrolyse. L'agencement d'autotransformateur (19) comprend un premier autotransformateur (19A) et un second autotransformateur (19B) couplés électriquement en série de telle sorte que le premier autotransformateur (19A) est disposé en amont du second autotransformateur (19B) avec ses bornes (43) connectées au réseau (25) et équipé au niveau de son enroulement primaire (39) d'un commutateur de dérivation (SI) et d'un commutateur élévateur (S2). L'installation d'électrolyse (1) est activée pour fonctionner en mode basse tension (LVRT). L'invention concerne en outre un procédé de fonctionnement d'une installation d'électrolyse (1), en particulier dans un mode de fonctionnement LVRT.