Power-to-hydrogen plant, control unit and control method thereof

A control unit for a Power-to-Hydrogen (PtH) plant, the control unit comprising at least one model and being configured to;

• calculate maximum efficiency point tracking of the PtH plant by solving an objective function having a predetermined hydrogen production rate of the PtH plant or a predetermined amount of energy input to the PtH plant using the at least one model, wherein the control unit receives measured parameters indicative of status of components of the PtH plant as an input to the at least one model;
• determine one or more set points for a coordinated operation of the components of the PtH plant based on a solution obtained by solving the objective function;
• and
• provide the one or more set points to one or more of the components of the PtH plant to operate the PtH at the maximum efficiency point,
• wherein the objective function comprises a maximum ratio corresponding to the maximum efficiency point of the PtH plant, and
• wherein the maximum ratio is a ratio of hydrogen energy corresponding to the predetermined hydrogen production rate to a minimum amount of energy required by the PtH plant.