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公开(公告)号：US09791876B2
公开(公告)日：2017-10-17
申请号：US14782785
申请日：2014-02-18
Applicant: Alstom Technology Ltd
Inventor： Colin Charnock Davidson
Abstract: A current limiter for selectively limiting a rate of change of current in a DC electrical network may include a first electrical block including an inductive element and a second electrical block including a bidirectional switch. The first electrical block is connected in parallel with the second electrical block between first and second terminals, and the first and second terminals are connectable to the DC electrical network. The bidirectional switch is switchable to: (1) a first mode to permit current flow through the second electrical block in a first current direction and at the same time inhibit current flow through the second electrical block in a second, opposite current direction; and (2) a second mode to permit current flow through the second electrical block in the second current direction and at the same time inhibit current flow through the second electrical block in the first current direction.
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公开(公告)号：US09780557B2
公开(公告)日：2017-10-03
申请号：US14653683
申请日：2013-11-13
Applicant: ALSTOM Technology Ltd
Inventor： Colin Charnock Davidson , Robert Whitehouse
CPC classification number: H02H9/02 , H02M7/483 , H02M2007/4835
Abstract: An electrical apparatus (10) comprises: first and second terminals (18,20) for connection to an electrical circuit; a chain-link converter (22) connected between the first and second terminals (18,20), the chain-link converter (22) including a plurality of chain-link modules (24), each chain-link module (24) including at least one switching element (26) and at least one energy storage device (28), the or each switching element (26) and the or each energy storage device (28) of each chain-link module (24) combining to selectively provide a voltage source; and a protection device (32) connected across an electrical block (34) that includes at least two of the plurality of chain-link modules (24), the protection device (32) including a plurality of series-connected semiconductor devices (36), wherein the protection device (32) selectively provides a current-conductive path to allow at least part of a current flowing in the electrical apparatus (10) to bypass the electrical block (34).
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公开(公告)号：US20170269161A1
公开(公告)日：2017-09-21
申请号：US15505004
申请日：2015-08-19
Applicant: ALSTOM TECHNOLOGY LTD
Inventor： David Reginald TRAINER , Si DANG , Francisco Jose MORENO MUNOZ , John VODDEN
IPC: G01R31/333
CPC classification number: G01R31/3336 , G01R31/3274 , H02M2007/4835
Abstract: A synthetic test circuit, for performing an electrical test on a device under test, is provided. The circuit includes a terminal connectable to the device under test; a voltage injection circuit-operably connected to the terminal, the voltage injection circuit including a voltage source, the voltage source including a chain-link converter, the chain-link converter including a plurality of modules, each module including a plurality of module switches connected with at least one energy storage device; and a controller-configured to operate each module of the voltage injection circuit to selectively bypass the or each corresponding energy storage device and insert the or each corresponding energy storage device into the chain-link converter so as to generate a voltage across the chain-link converter and thereby operate the voltage injection circuit to inject a unidirectional voltage waveform into the device under test.
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274.发明授权公开(公告)号：US09765629B2
公开(公告)日：2017-09-19
申请号：US14031660
申请日：2013-09-19
Applicant: ALSTOM Technology Ltd
Inventor： Sascha Justl , Carlos Simon-Delgado , Axel Heidecke , Sven Olmes
Abstract: A method and a cooling system for cooling blades of at least one blade row in a rotary flow machine includes an axial flow channel which is radially limited on the inside by a rotor unit and at the outside by at least one stationary component, the blades are arranged at the rotary unit and provide a shrouded blade tip facing radially to said stationary component. Pressurized cooling air is fed through from radially outside towards the tip of each of said blades in the at least one blade row, and the pressurized cooling air enters the blades through at least one opening at the shrouded blades' tip.
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公开(公告)号：US09755432B2
公开(公告)日：2017-09-05
申请号：US14896907
申请日：2014-06-06
Applicant: ALSTOM TECHNOLOGY LTD
Inventor： Colin Donald Murray Oates , David Reginald Trainer , Ralph Feldman , Michael Marc Claude Merlin , Timothy Charles Green
CPC classification number: H02J3/18 , H02J3/36 , H02M7/483 , H02M7/49 , H02M2001/0003 , H02M2007/4835
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US09740214B2
公开(公告)日：2017-08-22
申请号：US13946115
申请日：2013-07-19
Applicant: ALSTOM Technology Ltd
Inventor： Abhinaya Joshi , Hao Lei , Xinsheng Lou
CPC classification number: G05D7/0617 , G05B13/042 , G05B17/02
Abstract: A control system for optimizing a chemical looping (“CL”) plant includes a reduced order mathematical model (“ROM”) that is designed by eliminating mathematical terms that have minimal effect on the outcome. A non-linear optimizer provides various inputs to the ROM and monitors the outputs to determine the optimum inputs that are then provided to the CL plant. An estimator estimates the values of various internal state variables of the CL plant. The system has one structure adapted to control a CL plant that only provides pressure measurements in the CL loops A and B, a second structure adapted to a CL plant that provides pressure measurements and solid levels in both loops A, and B, and a third structure adapted to control a CL plant that provides full information on internal state variables. A final structure provides a neural network NMPC controller to control operation of loops A and B.
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公开(公告)号：US09739178B2
公开(公告)日：2017-08-22
申请号：US13900112
申请日：2013-05-22
Applicant: ALSTOM Technology Ltd
Inventor： Maurus Herzog , Suman Ray
Abstract: The invention relates to a steam Rankine cycle plant and a method for operating thereof. The plant comprises a higher-pressure steam turbine with an outlet and a reheater fluidly connected to the higher-pressure steam turbine. In addition, the plant has a lower-pressure steam turbine with an inlet that is fluidly connected to the reheater. The plant also has a bypass that is fluidly connecting the outlet and the inlet so as to bypass the reheater.
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公开(公告)号：US09735719B2
公开(公告)日：2017-08-15
申请号：US14705409
申请日：2015-05-06
Applicant: ALSTOM Technology Ltd
Inventor： Luis Diez-Maroto , Luis Rouco-Rodriguez , Fidel Fernandez-Bernal , Idriss El-Merdoui
Abstract: The present invention relates to the field of generator technology. It is an object of the invention to control the stability in an electric grid in which a plurality of generators are connected providing electric power to the grid. A static exciter system includes a control device for controlling the field voltage of the field winding of at least two generators connected to a grid system via a busbar.
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公开(公告)号：US09708983B2
公开(公告)日：2017-07-18
申请号：US14501651
申请日：2014-09-30
Applicant: ALSTOM Technology Ltd
Inventor： Adnan Eroglu , Juergen Hoffmann
CPC classification number: F02C9/26 , F02C3/14 , F02C9/263 , F02C9/28 , F23C6/047 , F23N1/002 , F23N2027/10 , F23N2037/02 , F23N2041/20 , F23R3/34 , F23R3/346 , F23R2900/03341
Abstract: The present disclosure refers to a method for operating a gas turbine with sequential combustors having a first-burner, a first combustion chamber, and a second combustor arranged sequentially in a fluid flow connection. To minimize emissions and combustion stability problems during transient changes when the fuel flow to a second combustor is initiated the method includes the steps of increasing the second fuel flow to a minimum flow, and reducing the first fuel flow to the first-burner of the same sequential combustor and/or the fuel flow to at least one other sequential combustor of the sequential combustor arrangement in order keep the total fuel mass flow to the gas turbine substantially constant. Besides the method a gas turbine with a fuel distribution system configured to carry out such a method is disclosed.
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公开(公告)号：US09695805B2
公开(公告)日：2017-07-04
申请号：US14609761
申请日：2015-01-30
Applicant: ALSTOM Technology Ltd
Inventor： Alain Adrien Kukonya , Abhinaya Joshi , Apurba Das , Rahul J. Terdalkar , Lionel Aimi
CPC classification number: F03G6/067 , F01K13/00 , F24S60/30 , F24S2020/10 , Y02E10/46
Abstract: A solar thermal power system includes a solar receiver for heating thermal energy storage fluid to be stored and utilized from a thermal energy storage arrangement having hot and cold storage tanks. The system includes a steam generator arrangement, which utilizes the heat of the thermal energy storage fluid to produce steam to run a turbine. The arrangement includes a bypass line configured to bypass the hot storage tank from the steam generator arrangement, and to supply the hot thermal energy storage fluid from the solar receiver directly to the steam generator arrangement, during day times, when the solar receiver the steam generator arrangement are both in operating mode, thereby recovering stored potential energy available in the down corner hot thermal energy storage fluid from the solar receiver.
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