Patent application number | Description | Published |
20120069610 | CONVERTER - A multilevel voltage source converter for high voltage DC power transmission and reactive power compensation. The voltage source converter includes at least one phase element including a plurality of semiconductor switches to interconnect a DC voltage and an AC voltage. The voltage source converter also includes at least one auxiliary converter to act as a waveform synthesizer to modify the DC voltage presented to the DC side of the phase element. | 03-22-2012 |
20120113699 | Converter - A voltage source converter for use in high voltage DC power transmission and reactive power compensation. The voltage source converter comprises at least one converter limb including first and second DC terminals for connection in use to a DC network and an AC terminal for connection in use to an AC network. | 05-10-2012 |
20130128629 | HYBRID 2-LEVEL AND MULTILEVEL HVDC CONVERTER - A voltage source converter is used in high voltage direct current power transmission and reactive power compensation. The voltage source converter comprises first and second DC terminals for connection in use to a DC network, three phase elements and at least one auxiliary converter connected between the first and second DC terminals, each phase element including a plurality of primary switching elements and at least one AC terminal for connection in use to a respective phase of a multi-phase AC network, the plurality of primary switching elements being controllable in use to facilitate power conversion between the AC and DC networks, the or each auxiliary converter being operable in use to act as a waveform synthesizer to modify a first DC voltage presented to the DC network so as to minimise ripple in the DC voltage. | 05-23-2013 |
20130208514 | CONVERTER FOR HVDC TRANSMISSION AND REACTIVE POWER COMPENSATION - A power electronic converter for use in high voltage direct current power transmission and reactive power compensation comprises a plurality of switching elements interconnecting in use a DC network and one or more AC networks, the plurality of switching elements being controllable in use to facilitate power conversion between the AC and DC networks, wherein in use, the plurality of switching elements are controllable to form one or more short circuits within the power electronic converter so as to define one or more primary current flow paths, the or each primary current flow path including a respective one of the AC networks and the power electronic converter and bypassing the DC network. | 08-15-2013 |
20150214834 | CONVERTER FOR HVDC TRANSMISSION AND REACTIVE POWER COMPENSATION - A power electronic converter for use in high voltage direct current power transmission and reactive power compensation comprises a plurality of switching elements interconnecting in use a DC network and one or more AC networks, the plurality of switching elements being controllable in use to facilitate power conversion between the AC and DC networks, wherein in use, the plurality of switching elements are controllable to form one or more short circuits within the power electronic converter so as to define one or more primary current flow paths, the or each primary current flow path including a respective one of the AC networks and the power electronic converter and bypassing the DC network. | 07-30-2015 |
Patent application number | Description | Published |
20120182771 | CONVERTER WITH ACTIVE FAULT CURRENT LIMITATION - A voltage source converter for high voltage DC power transmission is disclosed. According to one aspect, the voltage source converter is connectable between a DC network and another electrical network to interconnect the DC network and the other electrical network. The voltage source converter includes a converter unit configured to convert power flowing between the DC network and the other electrical network and at least one fault unit. One or more of the fault units includes at least one fault module having a voltage source that is operable, in the event of a short circuit in a DC network connected to the voltage source converter, to produce a voltage that acts to reduce current flowing through the voltage source converter and the short circuit. | 07-19-2012 |
20130119970 | CONVERTER - A DC voltage source converter for use in high voltage DC power transmission comprising at least one chain-link converter connected between first and second DC terminals. The or each chain-link converter includes a chain of modules connected in series and each module including at least one pair of semiconductor switches connected in parallel with an energy storage device. The or each chain-link converter is operable when DC networks are connected to the first and second DC terminals to control switching of the modules to selectively charge or discharge the energy storage device of one or more of the modules, as required, to offset any difference in the DC voltage levels of the DC networks. | 05-16-2013 |
20130182467 | CONVERTER - A voltage source converter comprising three phase elements defining a star connection in which a first end of each phase element is connected to a common junction; at least two converter limbs, each converter limb including first and second DC terminals for connection in use to a DC network and an AC terminal connected in series with a second end of a phase element, each converter limb defining first and second limb portions, including a chain-link converter, each chain-link converter including chain-link modules; and a third DC terminal connected to the common junction of the star connection to define an auxiliary connection, wherein in use a current is injected into the auxiliary connection to modify a voltage of each chain-link module in each limb portion. | 07-18-2013 |
20130208521 | HYBRID HVDC CONVERTER - A power electronic converter for use in high voltage direct current power transmission and reactive power compensation which comprises at least one converter limb including first and second DC terminals for connection in use to a DC network, the or each converter limb including at least one first converter block, and at least one second converter block connected between the first and second DC terminals; the or each first converter block including a plurality of line-commutated thyristors and at least one first AC terminal for connection in use to an AC network, the or each second converter block including, at least one auxiliary converter including a plurality of self-commutated switching elements; wherein the self-commutated switching elements are controllable in use to inject a voltage to modify a DC voltage presented to the DC side of the converter limb and/or modify an AC voltage and an AC current on the AC side of the power electronic converter. | 08-15-2013 |
Patent application number | Description | Published |
20090039652 | ELECTRICAL MACHINE - Embedding electrical machines in gas turbine engines has particular advantages by avoiding the need to provide mechanical connections. However, electrical machines such as switched reluctance electrical machines require relatively large electrical capacitors to accommodate and filter voltage variations in the phases of the electrical machine. Generally, the electrical machine will have a motoring period or generating period with a spacer period between. By injecting electrical current as electrical power in the spacer period, there is limited effect upon net torque within the electrical machine or electrical power generation. However, such stored electrical power in an inductive winding element of the electrical machine augments power pulses provided by a power source incorporating an electrical capacitor. In such circumstances, a smaller sized electrical capacitor can be used. | 02-12-2009 |
20130279211 | Modular Multilevel Converter - A power electronic converter for use in high voltage direct current power transmission and reactive power compensation includes at least one converter limb, which includes first and second DC terminals and an AC terminal. Each converter limb defines first and second limb portions connected in series between the AC terminal and a respective one of the first and second DC terminals. Each limb portion includes a chain-link converter connected in series with at least one primary switching element. Each chain-link converter includes a plurality of modules connected in series, and each module includes at least one secondary switching element connected to at least one energy storage device. Each primary switching element in each limb portion of a respective converter limb selectively defines a circulation path which carries a DC circulation current to regulate the energy level of at least one energy storage device in a respective chain-link converter. | 10-24-2013 |
20150035364 | CONTROL CIRCUIT - A control circuit ( | 02-05-2015 |
20150035395 | STATOR WINDING ARRANGEMENT FOR AN ELECTRICAL MACHINE - Described is an electrical machine, including: a rotor having a magnetic flux source mounted thereto; a stator winding arrangement having a first set of electrical connections to provide a first output channel, and a second set of electrical connections to provide a second output channel, the first and second channels being electrically out of phase, wherein the stator winding arrangement is constructed from a plurality of winding portions which are connected in electrical series. | 02-05-2015 |
20150049530 | POWER ELECTRONIC CONVERTER - A power electronic converter ( | 02-19-2015 |
20150349536 | CONTROL CIRCUIT - A control circuit ( | 12-03-2015 |
20150357901 | VOLTAGE SOURCE CONVERTER - A voltage source converter includes a converter limb extending between DC terminals and having limb portions separated by an AC terminal, the DC terminals being connectable to a DC electrical network and the AC terminal being connectable to an AC electrical network. Each limb portion includes at least one switching element and a chain-link converter including a series-connected modules, each module including at least one switching element and at least one energy storage device combining to selectively provide a voltage source. The chain-link converter is connected to the AC terminal, and the switching element(s) of each limb portion is switchable to switch the chain-link converter into and out of circuit with the corresponding DC terminal. The voltage source includes a control unit which coordinates the switching of the switching elements of the limb portions and the switching element(s) in each module of the chain-link converter. | 12-10-2015 |
20150357931 | CONVERTER - A voltage source converter ( | 12-10-2015 |
20150357941 | VOLTAGE SOURCE CONVERTER COMPRISING A CHAIN-LINK CONVERTER - A voltage source converter comprises: at least two converter limbs, each converter limb extending between DC terminals and having limb portions separated by an AC terminal. Each limb portion includes at least one switching element and at least one chain-link converter including series-connected modules. Each module includes at least one switching element and at least one energy storage device that combine to selectively provide a voltage source. The chain-link converter(s) form a branch to interconnect two AC terminals. Each limb portion is switchable to switch the corresponding chain-link converter(s) into and out of circuit with a respective DC terminal. The chain-link converter(s) is switchable to control the configuration of an AC voltage at each corresponding AC terminal. The converter further includes a control unit that coordinates the switching of the limb portions and the chain-link converter(s) to cause transfer of real power between the AC and DC electrical networks. | 12-10-2015 |
20160072407 | CONVERTER - A voltage source converter includes a converter limb having limb portions separated by an AC terminal and extending between DC terminals, each limb portion including a primary switching element to switch the limb portion into and out of circuit. The converter further includes an auxiliary limb. The primary switching element of each limb portion is switchable to switch the auxiliary limb into and out of circuit with the corresponding limb portion. The converter further includes a control unit to, in one mode, inject a circulation current that flows in one direction in one of the limb portions and minimize a current flowing in the opposite direction in that limb portion. Each primary switching element switches the respective limb portion into or out of circuit following the minimization of the limb portion current by the circulation current. | 03-10-2016 |
20160105109 | VOLTAGE SOURCE CONVERTER - A voltage source converter includes three branches connected at a first end to a junction to form a star configuration, the second end of each branch defining a DC terminal, the second ends of the second and third branches being connectable to a first DC voltage, and the second ends of the first and second branches being connectable to a second DC voltage. The first and second branches include primary switching elements, and the third branch includes a primary inductive element. The converter includes a converter limb connected in parallel with one of the first and second branches, the converter limb including a chain-link auxiliary converter including multiple series-connected modules controllable to selectively provide a voltage source to modify a branch voltage across the branch connected in parallel with the converter limb, each module including at least one secondary switching element and at least one energy storage device. | 04-14-2016 |
20160141876 | ALTERNATE ARM CONVERTER - An alternate arm converter includes at least one converter limb that defines first and second limb portions. Each limb portion includes at least one director switch connected in series with a chain-link converter between one of two DC terminals and an AC terminal of the converter. The chain-link converters are operable to generate a voltage waveform at the AC terminal, and the director switches are operable to switch the respective chain-link converters in and out of circuit between the respective DC terminal and the AC terminal. The converter also includes a controller configured to selectively control the switching of each director switch to form a current circulation path including each limb portion and the DC network. The controller, during formation of the current circulation path, forces an alternating current to flow through the current circulation path to transfer energy between the chain-link converters of the limb portions. | 05-19-2016 |
20160141962 | CONVERTER - A voltage source converter includes a converter limb directly connected between first and second DC terminals. The converter limb includes an AC terminal, a first limb portion directly connected between the first DC terminal and the AC terminal, and a second limb portion directly connected between the second DC terminal and the AC terminal. Only one of the first and second limb portions includes a multilevel converter block, the other of the first and second limb portions includes a switching block, the switching block is switchable to selectively permit current flow in at least one direction in the corresponding limb portion and inhibit current flow in at least one direction in the corresponding limb portion, and at least one of the first and second limb portions is controllable to control the configuration of an AC voltage waveform at the AC terminal. | 05-19-2016 |
Patent application number | Description | Published |
20130094264 | STATIC VAR COMPENSATOR WITH MULTILEVEL CONVERTER - A static synchronous compensator for use in reactive power compensation, the static synchronous compensator comprising at least one primary compensator limb including first and second DC terminals, and an AC terminal for connection in use to an AC network, the or each primary compensator limb defining first and second limb portions, each limb portion-including at least one switching element connected in series with a chain-link converter-between a respective one of the first and second DC terminate and the AC terminal, the switching elements of the first and second limb portions being operable to switch the respective chain-link converters in and out of circuit between the respective DC terminal and the AC terminal and the chain-link converters being operable to generate a voltage waveform at the AC terminal; and a secondary compensator limb including at least one DC link capacitor connected between the first and second DC terminals, the secondary compensator limb being connected in parallel with the or each primary compensator limb. | 04-18-2013 |
20140133196 | CONVERTER - A power electronic converter, for use in high voltage direct current power transmission and reactive power compensation, comprises at least one converter limb including first and second terminals being connectable to a DC network and a third terminal, the or each converter limb defining first and second limb portions connected in series between the third terminal and a respective one of the first and second terminals, each limb portion including a chain-link converter, each chain-link converter including a plurality of modules connected in series, each module including at least one primary switching element connected to at least one energy storage device, each converter limb being controllable to selectively define a circulation path carrying an AC circulation current for presentation to the DC network to minimise DC ripple in a DC voltage presented to the DC network. | 05-15-2014 |
20140139168 | ELECTRICAL SYSTEM - This invention relates to a multiple phase electrical system, including: a first and a second electrical lane, each lane having a generator and a load connected by a bus system, and a rectifier between the generator and load; and, a transformer connected between the two lanes, the transformer having a plurality of power windings across each of which corresponding phases of the first and second lanes are connected, and a plurality of phase shift windings. | 05-22-2014 |
20140254205 | DC TO DC CONVERTER ASSEMBLY - In the field of high voltage DC power transmission there is a need for a small, lightweight, inexpensive, and reliable means of connecting first and second high voltage DC power transmission networks. | 09-11-2014 |
20140293656 | DC TO DC CONVERTER ASSEMBLY - A DC to DC converter assembly, for connecting first and second high voltage DC power transmission networks, comprising first and second modular multilevel converters, each converter including a first converter limb having first and second limb portions, each limb portion including a least one module switchable to selectively provide a voltage source and thereby vary the magnitude ratio of a DC voltage (V1, V2) across the first and second terminals of a respective converter and an AC voltage (VAC) at the third terminal of the corresponding converter, the DC to DC converter assembly further including a first link electrically connecting the third terminal of one converter, with the third terminal of the other converter, and at least one converter further including a controller configured to switch the first and second limb portions in the first converter limb of the said converter into simultaneous conduction to divert a portion (IDiV1) of current flowing within the said converter away from the first link. | 10-02-2014 |
20140293668 | Hybrid AC/DC Converter For HVDC Applications - A power electronic converter, for connecting AC and DC networks and transferring power therebetween, comprises: first and second DC terminals for connection in use to a DC network; at least one primary converter limb extending between the first and second DC terminals and having first and second primary limb portions separated by a primary AC terminal for connection in use to a respective phase of a multi-phase AC network, at least one of the first and second primary limb portions including at least one primary active switching module to selectively allow current to flow through the corresponding primary converter limb in a first direction from the corresponding primary AC terminal to the DC terminals and in a second direction from the DC terminals to the corresponding primary AC terminal; and at least one secondary converter limb extending between the first and second DC terminals and having first and second secondary limb portions separated by a secondary AC terminal for connection in use to a further respective phase of the said multi-phase AC network, each of the first and second secondary limb portions including at least one passive current check element to limit current flow through the corresponding secondary converter limb to a single direction from the corresponding secondary AC terminal to the DC terminals. | 10-02-2014 |
Patent application number | Description | Published |
20090013717 | PROCESS AND APPARATUS FOR THE SEPARATION OF A GASEOUS MIXTURE - A process for separating carbon dioxide from a carbon dioxide containing fluid comprises the steps of: compressing the fluid in a compressor to form a compressed fluid, drying at least part of the compressed fluid to form a compressed and dried fluid, cooling at least part of the compressed and dried fluid to form a compressed, dried and cooled fluid, separating the compressed, dried and cooled fluid at a temperature lower than 0° C. into a carbon dioxide rich stream, a carbon dioxide lean stream and at least one intermediate purity liquid stream having a carbon dioxide purity lower than that of the carbon dioxide rich stream and higher than that of the carbon dioxide lean stream, expanding at least one intermediate purity liquid stream to produce at least one expanded stream using at least one expanded stream to cool the compressed and dried fluid and recycling at least part of the expanded stream. | 01-15-2009 |
20110302955 | Method For Trapping CO2 By Solid Cryocondensation In A Turbine - The present invention relates to a method of capturing carbon dioxide in a fluid comprising at least one compound more volatile than carbon dioxide CO2, for example methane CH4, oxygen O2, argon Ar, nitrogen N2, carbon monoxide CO, helium He and/or hydrogen H2. | 12-15-2011 |
Patent application number | Description | Published |
20130016872 | Voice Coil Former Stiffener - A support member for a voice coil former in an audio transducer is described. The support member comprises a bridge between the inner surface of the voice coil former and a radiating surface, such as a diaphragm or cone, which is disposed in the center of the voice coil former. The support member provides added rigidity to reduce wobble during operation of the transducer. | 01-17-2013 |
20130016873 | W Dome Speakers - A W-shaped radiating surface for a transducer assembly is described. The radiating surface has a center portion and an outer portion. The center portion is disposed in the center of a voice coil former and has a first sloping region and a second sloping region that meet at a first angle. The outer portion is disposed outside the center of the voice coil former and has a third sloping region and a fourth sloping region, which meet at a second angle. The center portion couples with the outer portion at a third angle to form a radiating surface that has a W-shaped cross section. | 01-17-2013 |
20130177190 | Balanced Momentum Inertial Duct - A duct design and methods for designing ducts are described herein. The duct has a profile described by an equation that balances momentum of the fluid flowing through the duct with an adverse pressure gradient. The duct profile is configured to: (i) maintain the fluid's momentum to be greater than the adverse pressure gradient present at any location within the duct, such that no boundary layer separation occurs; and (ii) achieve a fluid exit momentum of approximately zero. | 07-11-2013 |
20150382111 | VOICE COIL FORMER STIFFENER - A voice coil former for an audio transducer is described. The voice coil former has a corrugated circumferential surface for providing improved rigidity. The corrugated shape of the former provides sufficient rigidity such that unwanted resonance is eliminated from the audible range. In addition, the corrugated shape of former may also provide sufficient rigidity such that no additional supporting member is needed. | 12-31-2015 |
Patent application number | Description | Published |
20140129563 | MEDIA CATALOG SYSTEM, METHOD AND COMPUTER PROGRAM PRODUCT USEFUL FOR CATALOGING VIDEO CLIPS - Embodiments disclosed herein provide a new way to catalog digital assets derived or otherwise created from an original source such as a video, clip, movie, film, or the like. In one embodiment, time-based metadata, along with technical metadata and business metadata can be captured within a video and collected locally at a client device running media catalog client software. The collected information can be communicated to a media catalog server at the back end. The media catalog server can create a new asset based on the collected information and store the asset in a database. Multiple assets may be created to describe and reference the same video. However, the video itself is not modified and no variation of the video is created in anyway. | 05-08-2014 |
20140181240 | SYSTEM, METHOD AND COMPUTER PROGRAM PRODUCT FOR TEMPLATED EXPORT OF CONTENT - Embodiments disclosed herein provide systems and methods for a templated export. In one embodiment, a method may include determining an export template responsive to a first user action, the first user action indicating a delivery endpoint. The method may further include preparing an asset for delivery to the delivery endpoint utilizing the export template. The asset may include zero or more files. The export template may include predetermined configuration and delivery parameters particular to the delivery endpoint. The prepared asset may be communicated to the delivery endpoint without any further user action. | 06-26-2014 |
20140258336 | SYSTEM, METHOD AND COMPUTER PROGRAM PRODUCT FOR MANAGING TABULATED METADATA - Embodiments disclosed herein provide systems and methods for managing metadata, including scalar, text, drop-down, type ahead, and tabular metadata related to digital assets. Restrictions may be set at the metadata field level to allow users of different user groups to view fields based on restriction classes. A metadata management tool may allow an administrator to restrict one or more metadata fields associated with a digital asset in a network with a restriction class. The restricted fields may be associated with one or more user groups in the network. Only users in the user groups associated with the restriction class can view the restricted fields, in addition to the digital asset and any unrestricted fields associated therewith. When searching tabular metadata, a ‘row oriented’ search function may retrieve only assets where the search criteria are matched by a single row. | 09-11-2014 |