Abstract: A method for operating and electrolytic system may include an electrolyzer for generating hydrogen and oxygen as product gas. Hydrogen and oxygen produced during the electrolytic process are discharged from the electrolyzer. As a result, the efficiency of the electrolytic system is improved, at least one of the product gases in the expansion turbine is expanded, and a generator is driven by the expansion turbine.

Abstract: A high-voltage direction current transmission path includes at least one or two or more lines. Along at least one of the lines, at least one tapping/feeding point is provided at which at least one group of electrolytic cell stacks can be connected directly by a thyristor switching arrangement. The thyristor switching arrangement of each group of electrolytic cell stacks includes a power thyristor, a bypass thyristor and an emergency shutoff element switched in parallel to the power thyristor in a bypass line.

Abstract: An electrolysis stack for an electyrolyzer is electrically subdivided into a plurality of segments, each segment including a specific number of electrolysis cells. The electrolysis stack further has switches adapted for electrically short circuiting the segments of the electrolysis stack.

Abstract: A method for continuously supplying power to an electrolysis plant with a replacement power supply following failure of the power supply and an electrolysis plant with an electrolysis stack. The method includes supplying the electrolysis plant with power from an energy potential present in an electrolysis stack of the electrolysis plant, the energy potential being convertable into power, and reducing the energy potential present in the electrolysis stack of the electrolysis plant in a controlled manner. An electrolysis plant with an electrolysis stack includes a control unit configured for activation of at least one load of the electrolysis plant for consuming power from an energy potential of the electrolysis plant.

Abstract: A method for operating and electrolytic system may include an electrolyzer for generating hydrogen and oxygen as product gas. Hydrogen and oxygen produced during the electrolytic process are discharged from the electrolyzer. As a result, the efficiency of the electrolytic system is improved, at least one of the product gases in the expansion turbine is expanded, and a generator is driven by the expansion turbine.

Abstract: A high-voltage direction current transmission path includes at least one or two or more lines. Along at least one of the lines, at least one tapping/feeding point is provided at which at least one group of electrolytic cell stacks can be connected directly by a thyristor switching arrangement. The thyristor switching arrangement of each group of electrolytic cell stacks includes a power thyristor, a bypass thyristor and an emergency shutoff element switched in parallel to the power thyristor in a bypass line.

Abstract: The invention relates to a method for operating a high-pressure electrolysis system (2), wherein a hydrogen stream (6) and an oxygen stream (8) are produced in a high-pressure electrolyzer (4), and these are passed out of the high-pressure electrolyzer (4) under high pressure. In order to increase the efficiency of the high-pressure electrolysis system (2) with respect to cooling of the hydrogen produced in the high-pressure electrolysis system (2), the oxygen stream (8) is passed into a vortex tube (20) for decompression, in which the pressure energy of the oxygen is converted to refrigeration. This produces a cold oxygen stream (22) which is used to cool the hydrogen stream (6).

Abstract: An electrolysis stack for an electyrolyzer is electrically subdivided into a plurality of segments, each segment including a specific number of electrolysis cells. The electrolysis stack further has switches adapted for electrically short circuiting the segments of the electrolysis stack.

Abstract: The invention relates to a method for operating a high-pressure electrolysis system (2), wherein a hydrogen stream (6) and an oxygen stream (8) are produced in a high-pressure electrolyser (4), and these are passed out of the high-pressure electrolyser (4) under high pressure. In order to increase the efficiency of the high-pressure electrolysis system (2) with respect to cooling of the hydrogen produced in the high-pressure electrolysis system (2), the oxygen stream (8) is passed into a vortex tube (20) for decompression, in which the pressure energy of the oxygen is converted to refrigeration. This produces a cold oxygen stream (22) which is used to cool the hydrogen stream (6).