ENERGY MANAGEMENT SYSTEM, INDUSTRIAL FACILITY WITH AN ENERGY MANAGEMENT SYSTEM AND METHOD FOR OPERATING SUCH AN ENERGY MANAGEMENT SYSTEM

The energy management system comprises an electrolysis system (6) with an alkaline electrolysis unit (8) and a polymer electrolyte membrane (PEM) electrolysis unit (10), and a control unit. The control unit is: designed to adapt a total power of the electrolysis system to independently control the electrolysis units; and adapted to vary a power of the PEM electrolysis unit for the adaptation of the overall performance of the electrolysis system. The alkaline electrolysis unit is operable in a capacity range of 25-100% of rated output, and has an adaptation time of 1-5 minutes. The energy management system comprises an electrolysis system (6) with an alkaline electrolysis unit (8) and a polymer electrolyte membrane (PEM) electrolysis unit (10), and a control unit. The control unit is: designed to adapt a total power of the electrolysis system to independently control the electrolysis units; and adapted to vary a power of the PEM electrolysis unit for the adaptation of the overall performance of the electrolysis system. The alkaline electrolysis unit is operable in a capacity range of 25-100% of rated output, and has an adaptation time of 1-5 minutes for power adaptation and a power of 100 KW to 5 MW. The PEM electrolysis unit is operable in a capacity range of 0-300% of rated output, and has an adaptation time of 1-30 seconds for power adaptation and a power of 50-500 KW. Independent claims are included for: (1) an industrial plant; and (2) a method of operating an energy management system.