Verfahren zum Betrieb eines Elektrolysesystems, Zugehörige Steuerung, Stromversorgung und Elektrolysesystem

Details

Veröffentlichungs-Nr.

EP4822938

Anmeldetag

7. April 2025

Veröffentlichung

14. Oktober 2026

Rechtsraum

EP

Abstract

A method for operating an electrolysis system (2) is provided. The method comprises an electrolyzer (6), a transformer (3), and a rectifier (4, 5), wherein the transformer (3) receives an electrical AC power from an electrical grid (104) and provides an AC power (AC) output to the rectifier (5), wherein the rectifier (5) converts the AC power output (AC) into a DC power input (P1) for the electrolyzer (6), the method further comprising i), identifying begin-of-life (BOL) parameters for an electrolyzer stack (6) based on a measurement, wherein a linear dependency between a DC voltage (Udc<bol>) and a related DC current (Idc) is determined, ii), identifying end-of-life (EOL) parameters for the electrolyzer stack (6) based on a theoretical assumption, wherein a linear dependency between a DC voltage (Udc<eol>) and the related DC current (Idc) is determined, and iii) deriving a polarization curve of an actual ageing status (M) of the electrolyzer stack based on the identified parameters (BOL, EOL), wherein the derived polarization curve is used for determining of a new DC power input (P2) based on a new AC power setpoint requested from a grid operator. Moreover, a related power supply, a controller, a computer program and a related electrolyzer system are provided.

Anmelder

Firma

Siemens Energy Global GmbH & Co. KG

Land

🇩🇪 Deutschland