Patent application number | Description | Published |
20110254368 | POWER DISTRIBUTION SYSTEM AND METHOD THEREOF - The proposed system has a plurality of generator systems, each generator system having an alternating current generator directly connected to a rectifier. The alternating current generator is rotationally coupled to a prime mover, wherein, upon operation of the prime mover, the alternating current generator produces an alternating current output , is de-synchronized to further ones of the plurality of generator systems and has a variable generator speed. The rectifier directly connected the alternating current generator is adapted to convert the alternating current output of the alternating current generator into a direct current output. A direct current distribution bus is coupled to the direct current outputs from each of the rectifiers. The system further has a plurality of inverters adapted to receive power from the direct current distribution bus, the output of each inverter being adapted to drive an alternating current motor. | 10-20-2011 |
20130078875 | Onboard Floating Drilling Installation and Method for Operating an Onboard Floating Drilling Installation - The disclosure relates to an onboard floating drilling installation and to a method for operating an onboard floating drilling installation, comprising a draw-works for reeling out and reeling in a drilling line, comprising several thrusters for dynamic positioning the onboard floating drilling installation and comprising at least one generator to operate the thrusters and the draw works. | 03-28-2013 |
20130187451 | Power Switching Assembly - A power switching assembly for switching power in a power distribution bus, and a power distribution system including such a power switching assembly, are disclosed. The power switching assembly includes a first terminal, a second terminal, a first semiconductor element and a second semiconductor element electrically coupled between the first terminal and the second terminal to provide controllability of a current flow from the first terminal to the second terminal and from the second terminal to the first terminal A controller for controlling the semiconductor elements may be configured to implement one or more of various control schemes such as a breaker, a current limiter, a load balancer, and a precharging device. | 07-25-2013 |
20130188402 | Subsea DC Transmission System - A subsea electrical power transmission system may include a rectifier located at the source of the energy feeding a subsea DC power transmission path, e.g. a transmission cable with DC power. The voltage level can be adjusted to the actual installation and may typically be 100 kV. To reduce the voltage at the destination a step down chopper is used in one embodiment. This may reduce the voltage to a suitable input voltage for a VSD-inverters (VSD: variable speed drive) feeding electrical consumers such as motors. | 07-25-2013 |
20130228471 | Adaptive Active Cathodic Protection - A device comprising an electrically conductive surface portion is provided for immersion in an electrically conductive liquid such as water. At least one load electrode is provided for supplying an electric load current into the electrically conductive liquid. Further, an electrode, e.g., one or more of the at least one load electrode acts as protection electrode. A protection current source, e.g., a resistor, is electrically coupled to the conductive surface portion and to the protection electrode for providing a protection current flowing between the electrically conductive surface portion and the electrode. Further, the protection current source is adapted for changing the protection current in response to a change in the load current. | 09-05-2013 |
20130252482 | Subsea Container Electrical Through Connector - A subsea container electrical through connector for providing an electrical connection from an interior of a subsea container to an exterior of the subsea container is disclosed, wherein the connector extends partially into or fully through a hole in a subsea container. The connector comprises a conductive bolt having a conical bolt portion with an outer diameter increasing in a longitudinal direction. Further, the connector comprises an electrical insulator having a conical insulator portion with an inner surface, facing the conical bolt portion of the bolt, and an outer surface having an outer diameter which increases in the longitudinal direction. | 09-26-2013 |
20130300491 | Subsea Power Switching Device and Methods of Operating the Same - It is described a switching device comprising a semiconductor switching unit; a contactor electrically coupled in series with the semiconductor switching unit; and a controller being configured for activating an electrically isolating state of the switching device and/or activating an electrically conducting state of the switching device based on a command signal or based on a comparison of a measured value and predetermined activation condition. | 11-14-2013 |
20140055227 | SUBSEA FUSE ASSEMBLY - A subsea fuse assembly is provided. The subsea fuse assembly is adapted to be operated in a pressurized environment. The subsea fuse assembly includes an enclosure adapted to be filled with a dielectric liquid, and a pressure compensator including a flexible element for pressure compensation. The subsea fuse assembly also includes a first penetrator and a second penetrator each passing through a wall of the enclosure for leading a first electric conductor and a second electric conductor, respectively, into the enclosure. The subsea fuse assembly includes a fuse arranged inside the enclosure and connected between the first electric conductor and the second electric conductor. | 02-27-2014 |
20140098468 | Subsea Electrical Power System - A subsea electrical power system is provided. The subsea electrical power system includes a first subsea electric device having a first subsea enclosure and a second subsea electric device having a second subsea enclosure. The first subsea electric device and the second subsea electric device are mounted on a common frame. A duct is provided between the first subsea enclosure and the second subsea enclosure. | 04-10-2014 |
20140374132 | Pressure Resistant Housing for an Electric Component - A pressure resistant housing for an electric component is provided. The pressure resistant housing is adapted for the use in a subsea application. A ceramic housing body houses the electric component. The ceramic housing body has a first opening and a second opening that are closed by a first metal lid and a second metal lid, respectively. | 12-25-2014 |
20150008765 | Transferring Electrical Power for Subsea Applications - A method is provided for transferring electrical power. AC power is generated and guided at least partially underwater. The AC power is guided through a cable from a first end of the cable to a second end of the cable. A frequency of the AC power guided through the cable is adjusted in dependence of a length of the cable between the first end and the second end of the cable. | 01-08-2015 |
20150008766 | Method and Apparatus for Transferring Electrical Power for Subsea Applications - Methods for transferring electrical power in the sea include: generating AC power; and guiding, at least partially underwater, the AC power through a cable from a first end of the cable to a second end of the cable. A first reactor is connected near the first end of the cable and a second reactor is connected near the second end of the cable. Inductances of the first reactor and the second reactor are selected to at least partially compensate for reactive power generated in the cable. | 01-08-2015 |
20150009735 | Transferring Electrical Power for Subsea Applications - A method for transferring electrical power in the sea includes generating AC power, guiding, at least partially underwater, the AC power through a cable from a first end of the cable to a second end of the cable, and changing a frequency of the AC power guided through the cable based on a value of power consumption of a load connected to the second end of the cable. | 01-08-2015 |
20150077205 | Subsea Transformer - A subsea transformer that includes a transformer and a transformer tank adapted to accommodate the transformer is provided. The transformer tank has an opening that is sized so as to enable insertion of the transformer into the transformer tank through the opening. A closing plate is adapted to close the opening of the transformer tank. At least one component having a double barrier against ingress of an ambient medium surrounding the subsea transformer when installed subsea is mounted to the closing plate. | 03-19-2015 |