A HYDROGEN PRODUCTION PLANT COMPRISING TWO TYPES OF ELECTROLYSIS SYSTEMS

The invention relates to the field of hydrogen production plant, particularly to a method for producing hydrogen in the hydrogen production plant by using two types of electrolysis systems. The first electrolysis system (ES1) comprises an active DC module (Ma) and at least one first-type electrolyzer (E1), which is configured for producing a first hydrogen output (HO1) by using a first power from the active DC module (Ma), and the second electrolysis system (ES2), comprising a passive DC module (Mp) and at least one second-type electrolyzer (E2), which is configured for producing a second hydrogen output (HO2) by using a second power from the passive DC module (Mp). The method comprises the steps of: in a ramp-up phase, increasing the first hydrogen output (HO1) of the first electrolysis system (ES1); and when the first hydrogen output (HO1) of the first electrolysis system (ES1) crosses a first predefined hydrogen output threshold (HO