Abstract: An electrical energy distribution system for a vessel or platform includes a plurality of DC buses, each DC bus coupled to a corresponding energy storage bus; each energy storage bus being coupled to a neighboring energy storage bus of the system through a first DC/DC converter. The plurality of energy storage buses are connected together to form a ring. Each energy storage bus is further coupled to an energy store through a second DC/DC converter.

Abstract: An electrical energy distribution system for a vessel or platform includes a plurality of DC buses, each DC bus coupled to a corresponding energy storage bus; each energy storage bus being coupled to a neighboring energy storage bus of the system through a first DC/DC converter. The plurality of energy storage buses are connected together to form a ring. Each energy storage bus is further coupled to an energy store through a second DC/DC converter.

Abstract: An arrangement provides an AC current to a load for direct electrical heating. The arrangement includes a AC-DC-AC converter cell. The converter cell has at least two converter input terminals connected to at least two transformer output terminals. The converter cell has a first converter output terminal and a second converter output terminal, wherein the first converter cell output terminal is adapted to be connected to the load.

Abstract: An electric charging system for a vessel, vehicle, or aircraft includes one or more energy storage modules on the vessel, vehicle, or aircraft; a pulse rectifier; a converter; and a voltage control transformer. The one or more energy storage modules are connected to outputs of the pulse rectifier. The voltage control transformer is connected to inputs of the pulse rectifier. The voltage control transformer includes a serial transformer having a plurality of pairs of transformer windings, connected together in series, one winding of each pair being adapted to be connected between the pulse rectifier and an input from an energy source and the other winding is connected to the converter.

Abstract: An exhaust system for energy storage modules connected in series in a cubicle and energy storage cubicles connected in parallel. A cubicle exhaust duct is connected to each of the storage modules in one cubicle and an opening between each of the storage modules and the exhaust duct. A common exhaust duct is connected to each cubicle exhaust duct, an extractor fan, a fluid inlet for the extractor fan with a duct connected to a source of air and a fluid outlet for the extractor fan. A cross section of the fluid inlet is smaller than the fluid outlet. An entry of the fluid inlet and an exit of the fluid outlet are outside the storage device and outside a compartment of the storage device. The extractor fan circulates air and creates an under-pressure in the common exhaust duct and cubicle exhaust ducts to guide gas out the exhaust ducts.

Abstract: An exhaust system for energy storage modules connected in series in a cubicle and energy storage cubicles connected in parallel. A cubicle exhaust duct is connected to each of the storage modules in one cubicle and an opening between each of the storage modules and the exhaust duct. A common exhaust duct is connected to each cubicle exhaust duct, an extractor fan, a fluid inlet for the extractor fan with a duct connected to a source of air and a fluid outlet for the extractor fan. A cross section of the fluid inlet is smaller than the fluid outlet. An entry of the fluid inlet and an exit of the fluid outlet are outside the storage device and outside a compartment of the storage device. The extractor fan circulates air and creates an under-pressure in the common exhaust duct and cubicle exhaust ducts to guide gas out the exhaust ducts.

Abstract: An electrical energy distribution system for a vessel or platform with at least a primary energy source comprising an AC generator. A first output of the AC generator is coupled to a first DC bus via a transformer and an AC to DC converter and a second output of the AC generator is separately coupled to a second DC bus via a rectifier. The second DC bus is operable at a first voltage level and is connected to one or more primary consumers. The first DC bus is operable at a second voltage level, lower than the first voltage level and is connected to secondary consumers. In the event of the output of the AC generator to the primary consumers on the first DC bus being insufficient, energy from electric energy storage elements is supplied to the primary consumers via the rectifier and the first DC bus.

Abstract: A DC power distribution system includes a plurality of power sources and a DC power distribution bus having a plurality of DC bus sections. At least one power source is coupled to each of the DC bus sections. One or more power switching assemblies couple one of the DC bus sections to another. The power switching assembly has first and second terminals, the first terminal being electrically coupled to a first bus section and the second terminal being electrically coupled to a second bus section. First and second semiconductor devices are electrically coupled between the first and second terminal to control current flow between the first terminal and the second terminal. At least one power switching assembly further includes a pair of current limiters coupled between the first and second semiconductor devices and an energy store is coupled to that power switching assembly between the pair of current limiters.

Abstract: A DC power distribution system has power sources, a DC power distribution bus with DC bus sections. The system has power switching assemblies to couple one of the DC bus sections to another and a system controller. An inverter is connected to one of the power switching assemblies to supply a consumer. The first and second terminals are electrically coupled to first and second bus sections. First and second semiconductor devices between the terminals control current flow and there is a current connection from each terminal to a power switching assembly controller for providing an indication of current. A control signal line is connected between the power switching assembly controller and each semiconductor device provides a signal to the semiconductor devices to control the current flow and an inverter coupler couples each current connection to the inverter. The inverter coupler has a feed from each current connection to the inverter.

Abstract: An arrangement provides an AC current to a load for direct electrical heating. The arrangement includes a AC-DC-AC converter cell. The converter cell has at least two converter input terminals connected to at least two transformer output terminals. The converter cell has a first converter output terminal and a second converter output terminal, wherein the first converter cell output terminal is adapted to be connected to the load.

Abstract: A DC power supply system has first and second DC power distribution bus sections and a DC power switching assembly has a plurality of series connected power switching units and a current limiter. Each power switching unit has a first and second power switching unit terminal and two symmetrical power switching sub-units to control current flow between. Each sub-unit is electrically connected on one side to one of the first and second power switching unit terminals and on the other side to the other sub-unit. The power switching sub-units each have a semiconductor device and in parallel with the semiconductor device, a series connected diode and capacitor. A first terminal of the assembly is electrically coupled to the first bus section and the second terminal is electrically coupled to the second bus section. The voltage at one side of the power switching assembly is greater than or equal to 1 kV.

Abstract: An electric charging system for a vessel, vehicle, or aircraft includes one or more energy storage modules on the vessel, vehicle, or aircraft; a pulse rectifier; a converter; and a voltage control transformer. The one or more energy storage modules are connected to outputs of the pulse rectifier. The voltage control transformer is connected to inputs of the pulse rectifier. The voltage control transformer includes a serial transformer having a plurality of pairs of transformer windings, connected together in series, one winding of each pair being adapted to be connected between the pulse rectifier and an input from an energy source and the other winding is connected to the converter.

Abstract: An electrical energy distribution system for a vessel or platform with at least a primary energy source comprising an AC generator. A first output of the AC generator is coupled to a first DC bus via a transformer and an AC to DC converter and a second output of the AC generator is separately coupled to a second DC bus via a rectifier. The second DC bus is operable at a first voltage level and is connected to one or more primary consumers. The first DC bus is operable at a second voltage level, lower than the first voltage level and is connected to secondary consumers. In the event of the output of the AC generator to the primary consumers on the first DC bus being insufficient, energy from electric energy storage elements is supplied to the primary consumers via the rectifier and the first DC bus.

Abstract: It is described an arrangement for providing an AC current to a load for direct electrical heating, the arrangement comprising a AC-DC-AC converter cell (133, 433, 533, 633, 733), the converter cell having at least two converter input terminals (111, 112, 113) connected to at least two transformer output terminals, the converter cell having a first converter output terminal (135, 435, 535) and a second converter output terminal (137, 437, 537), wherein the first converter cell output terminal (135) is adapted to be connected to the load (350, 650, 750, 850).

Abstract: A DC power switching assembly includes a plurality of series connected power switching units. Each power switching unit has a first terminal of the unit and a second terminal of the unit, the terminals having the same polarity. A power switching sub-unit is electrically coupled between the first terminal and the second terminal of the unit to control current flow between the first terminal and the second terminal. The sub-unit has at least one semiconductor device, a current limiter and a pair of series connected diodes in parallel with the current limiter. The series connected diodes and current limiter are connected to one terminal of the semiconductor device; and a capacitor is connected to the other terminal of the semiconductor device.

Abstract: A DC power distribution system includes a plurality of power sources and a DC power distribution bus having a plurality of DC bus sections. At least one power source is coupled to each of the DC bus sections. One or more power switching assemblies couple one of the DC bus sections to another. The power switching assembly has first and second terminals, the first terminal being electrically coupled to a first bus section and the second terminal being electrically coupled to a second bus section. First and second semiconductor devices are electrically coupled between the first and second terminal to control current flow between the first terminal and the second terminal. At least one power switching assembly further includes a pair of current limiters coupled between the first and second semiconductor devices and an energy store is coupled to that power switching assembly between the pair of current limiters.

Abstract: An arrangement for controlling a synchronous generator having a stator comprising at least one stator winding and having a rotor with an electromagnet driven by a field current is provided. The rotor is rotatable relative to the stator. The electromagnet is inductively coupled to the at least one stator winding. The arrangement includes a measurement system configured to measure at least one quantity and a controller configured to cause shutting down the field current when the at least one quantity satisfies at least one criterion associated with at least one malfunction.

Abstract: A DC power switching assembly includes a plurality of series connected power switching units. Each power switching unit has a first terminal of the unit and a second terminal of the unit, the terminals having the same polarity. A power switching sub-unit is electrically coupled between the first terminal and the second terminal of the unit to control current flow between the first terminal and the second terminal. The sub-unit has at least one semiconductor device, a current limiter and a pair of series connected diodes in parallel with the current limiter. The series connected diodes and current limiter are connected to one terminal of the semiconductor device; and a capacitor is connected to the other terminal of the semiconductor device.

Abstract: A DC power supply system has first and second DC power distribution bus sections and a DC power switching assembly has a plurality of series connected power switching units and a current limiter. Each power switching unit has a first and second power switching unit terminal and two symmetrical power switching sub-units to control current flow between. Each sub-unit is electrically connected on one side to one of the first and second power switching unit terminals and on the other side to the other sub-unit. The power switching sub-units each have a semiconductor device and in parallel with the semiconductor device, a series connected diode and capacitor. A first terminal of the assembly is electrically coupled to the first bus section and the second terminal is electrically coupled to the second bus section. The voltage at one side of the power switching assembly is greater than or equal to 1 kV.

Abstract: A DC power distribution system has power sources, a DC power distribution bus with DC bus sections. The system has power switching assemblies to couple one of the DC bus sections to another and a system controller. An inverter is connected to one of the power switching assemblies to supply a consumer. The first and second terminals are electrically coupled to first and second bus sections. First and second semiconductor devices between the terminals control current flow and there is a current connection from each terminal to a power switching assembly controller for providing an indication of current. A control signal line is connected between the power switching assembly controller and each semiconductor device provides a signal to the semiconductor devices to control the current flow and an inverter coupler couples each current connection to the inverter. The inverter coupler has a feed from each current connection to the inverter.