Siemens Energy

The invention relates to pre-magnetizing a transformer (3) of an electrolyzer power supply system (2) and a corresponding method. The electrolyzer power supply system (2) comprises a transformer (3) and a converter (4), particularly a self-commutated converter, wherein the transformer (3) is adapted to convert an alternating current electrical power output (5) from an electrical grid (6) into an alternating current electrical power input (7) for the converter (4). The converter (4) is adapted to convert the alternating current electrical power input (7) from the transformer (3) into a direct current electrical power input (8) for an electrolyzer (9). For pre-magnetizing the transformer (3), the converter (4) is adapted to provide a pre-magnetization current (13) from a direct current source (10) to the transformer (3).

Method of operating an electrolysis system (2) wherein the method comprising the step of: (S100) providing a control signal (S5) to a product valve (18b) on the oxygen-side (V) of the electrolysis system (2) to keep the product valve (18b) open in order to buffer oxygen provided by the electrolysis system (2) in a buffer tank (14b) on the oxygen-side (V) in normal operation of the electrolysis system (2).

The invention concerns a gasket (10a; 10b) for an electrolyzer (34) cell stack (12) comprising a base plate (14) having a recess (16) configured to accommodate a part of a layer (32) of said electrolyzer (34) cell stack (12), a sealing (20) which is positioned along a wall (22) of the base plate (14) bounding said recess (16), and a mount (24) to support said part of the layer (32) of the electrolyzer (34) cell stack (12) at a predetermined position along a direction (26) transverse, preferably substantially perpendicular, to a plane of the base plate (14).

Die Erfindung betrifft ein Submodul (1) für einen modularen Multilevelumrichter, wobei das Submodul (1) eine Mehrzahl von Leistungshalbleiterschalteinheiten (13, 15), die in einer Brückenschaltung angeordnet sind, wenigstens einen Energiespeicher (7) zum Speichern elektrischer Energie, wenigstens einen parallel zur Energiespeichereinheit (7) geschalteten Dauerentladewiderstand (11), wenigstens einen mechanischen Überbrückungsschalter (31), der ausgestaltet ist, Anschlussklemmen (3, 5) des Submoduls (1) in einem geschlossenen Zustand zu überbrücken, und wenigstens eine zur Steuerung der Leistungshalbleiterschalteinheiten (13, 15) und des mechanischen Überbrückungsschalters (31) ausgestaltete Steuerungseinheit (33), aufweist. Die Erfindung betrifft zudem ein Verfahren zum schnellen Entladen eines Energiespeichers (7) eines Submoduls (1). Um den Energiespeicher (7) des Submoduls (1) in einem modularen Multilevelumrichter schnell und sicher entladen zu können, ist vorgesehen, dass die Steuerungseinheit (33) ausgestaltet ist, die Leistungshalbleiterschalteinheiten (13, 15) während des Schließens oder nach dem Schließen des mechanischen Überbrückungsschalters (31) derart anzusteuern, dass der Energiespeicher (7) über den geschlossenen mechanischen Überbrückungsschalter (31) und über wenigstens eine der Leistungshalbleiterschalteinheiten (13, 15) kurzgeschlossen ist.

The invention relates to a method of controlling an electrolyzing plant (10) having plural electrolyzing cells (14) providing an electrolyzing process in response to being subjected to a DC electrolyzing power, wherein the electrolyzing plant is supplied with electric power from an electric power network (12) deploying an alternating voltage having a basic frequency, wherein an AC side (22) of an electric converter (20) is connected with the electric power network, a DC side (24) of the electric converter (20) provides the DC electrolyzing power. A synchronous machine (30) has a stator winding, wherein a rotational speed of a rotor (28) of the synchronous machine is detected by a speed sensor (26) that provides a sensor signal (34), wherein a control apparatus (36, 54) receives and processes the sensor signal and controls an operation of an energy adaptation device (44, 46) dependent on the processed sensor signal.

The invention relates to a method of controlling an electrolyzing plant (10) having plural electrolyzing cells (14) providing an electrolyzing process in response to being subjected to a DC electrolyzing power, wherein the electrolyzing plant is supplied with electric power from an electric power network (12) deploying an alternating voltage having a basic frequency, wherein an AC side (22) of an electric converter (20) is connected with the electric power network, a DC side (24) of the electric converter (20) provides the DC electrolyzing power. A synchronous machine (30) has a stator winding being connected with the electric power network, wherein a rotational speed of a rotor (28) of the synchronous machine is detected by a speed sensor (26) that provides a sensor signal (34), wherein a control device (36) receives and processes the sensor signal and controls an operation of the electric converter dependent on the processed sensor signal.

A manufacturing system and method where a fluid path is formed between a pre-heating section, a waste heat recovery section, a cooling section, a reactor section, the calcining section, and back to the pre-heating section, wherein a fluid, specifically carbon dioxide, is circulated and used within path while also capturing any generated carbon dioxide.

An anchor monitoring system for a marine wind turbine held in an operating position by an anchor includes a sensor assembly including a subsea housing fixedly attached to the anchor and positionable at an operating location on a seabed. A tilt sensor is positioned within the subsea housing and operates to measure an angle of the anchor. In addition, a second sensor selected from one of a pressure sensor, a temperature sensor, and a vibration sensor, and a third sensor selected from one of a pressure sensor, a temperature sensor, and a vibration sensor are positioned within the subsea housing. A controller operates to detect a change in an operating condition of the anchor in response to the receipt of a measured angle from the tilt sensor, a second measured value from the second sensor, and a third measured value from the third sensor.

Die Erfindung betrifft eine Endstufe (1) für eine Dampfturbine, umfassend mehrere einen Leitschaufelkranz (2) bildende Leitschaufeln (3) sowie mehrere einen Laufschaufelkranz (4) bildende Laufschaufeln (5). Zwischen jeweils zwei benachbarten Leitschaufeln (3) ist jeweils wenigstens eine Leitrippe (6) angeordnet, die sich in Richtung von einer Leitschaufelvorderkante (7), zu einer Leitschaufelhinterkante (8), erstreckt. Darüber hinaus ist im Laufschaufelkranz (4) ein Dämpfungselement (9) vorgesehen, welches die Laufschaufeln (5) des Laufschaufelkranz (4) untereinander verbinden. Erfindungsgemäß sind die Leitrippen (6) so ausgebildet und angeordnet, dass sie das Arbeitsfluid der Dampfturbine, im Nennlastbetrieb im Wesentlichen um das Dämpfungselement (9) herumleiten.

A method for operating an electrolysis system comprising an electrolyzer (7) and an on-load tap changing transformer (2) is provided. The system further comprises at least two line-commutated converters (3), preferably IGBT converters, wherein the on-load tap changing transformer (2) receives an electrical power (4) from an electrical power source (5) and provides an electrical power output (4) to the line-commutated converters (3), wherein the at least two line-commutated converters (3) are electrically connected in parallel between the on-load tap changing transformer (2) on a AC side and an electrolyzer (7) on a DC side and convert the electrical power output (4) into an electrical power input (6) for the electrolyzer (7), wherein the at least two converters (3) are connected to the same transformer AC bus, the method comprising in a ramping phase of the electrolyzer (7, 100) adjusting a voltage (U_E) of the electrical power input (6) by means of only one of the parallelly connected converters (3) to a tap changing voltage (U_tap), wherein the other parallelly connected converter is in a stand-by mode. Moreover, a related power supply, a controller, computer program and a related electrolyzer system are provided.