公开(公告)号：US20190214824A1

公开(公告)日：2019-07-11

申请号：US16357574

申请日：2019-03-19

Applicant: General Electric Company

Inventor： Amol Rajaram KOLWALKAR ,  Somakumar RAMACHANDRAPANICKER ,  Arvind Kumar TIWARI ,  Subbarao Tatikonda

IPC: H02J3/38 ,  H02J7/35

CPC classification number: H02J3/381 ,  H02J3/383 ,  H02J3/386 ,  H02J7/35 ,  H02P9/007 ,  H02P2207/073 ,  Y02E10/563 ,  Y02E10/566 ,  Y02E10/763

Abstract: A power generation system is disclosed. The power generation system includes a doubly-fed induction generator (DFIG) coupled to a variable speed engine and a photo-voltaic (PV) power source. The DFIG includes a generator to generate a first electrical power based at least partially on an operating speed of the variable speed engine. The PV power source may supply a second electrical power to a Direct Current (DC) link between a rotor side converter and a line side converter of the DFIG. The generator and the line side converter are coupled to an electric grid and/or a local electrical load to supply the first electrical power and at least a portion of the second electrical power to the local electrical load.

公开(公告)号：US20190157865A1

公开(公告)日：2019-05-23

申请号：US16217853

申请日：2018-12-12

Applicant: Gram Power, Inc.

Inventor： Yashraj Khaitan ,  Jacob Dickinson

IPC: H02J3/14 ,  H02J3/38 ,  G05B15/02 ,  H02J3/32 ,  G06F1/26

CPC classification number: H02J3/14 ,  G05B15/02 ,  G06F1/263 ,  H02J3/32 ,  H02J3/382 ,  H02J3/383 ,  H02J3/386 ,  Y02E10/563 ,  Y02E10/566 ,  Y02E10/763 ,  Y02E70/30

Abstract: An intelligent user-side power management device (PMD) that has an optional energy storage unit and can interface with a utility grid or microgrid to eliminate power theft and efficiently provide clean energy to the users of the grid while helping the grid to do smart demand response management, particularly for renewable energy based grids that need to efficiently manage the slack due to the large variability in power generation through these energy sources.

公开(公告)号：US20190036344A1

公开(公告)日：2019-01-31

申请号：US16144697

申请日：2018-09-27

Applicant: Wobben Properties GmbH

Inventor： Alfred BEEKMANN ,  Matthias BARTSCH ,  Marcel KRUSE

IPC: H02J3/38 ,  F03D9/30

CPC classification number: H02J3/386 ,  F03D7/048 ,  F03D9/11 ,  F03D9/257 ,  F03D9/30 ,  H02J3/40 ,  H02J2003/388 ,  Y02E10/723 ,  Y02E10/725 ,  Y02E10/763

Abstract: A method for feeding electrical power into an electrical supply network by means of at least one wind farm respectively connected to the supply network via a network connection point, wherein the supply network is to be operated at a network frequency, and each wind farm has a plurality of wind power installations, comprising the steps of determining whether the electrical supply network is operating, starting the at least one wind farm in a black-start mode for the purpose of producing electrical power for feeding into the supply network if the supply network is not operating, operating the at least one wind farm in black-start operation in which electrical power is fed into the supply network and the supply network is operated thereby, wherein the network frequency is specified by the feeding-in of the electrical power in the black-start mode and/or during black-start operation.

公开(公告)号：US20180355848A1

公开(公告)日：2018-12-13

申请号：US15780733

申请日：2016-11-25

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Mu WEI ,  Martin Ansbjerg KJÆR ,  Kouroush NAYEBI ,  Jesper Sandberg THOMSEN ,  Eik HERBSLEB

IPC: F03D7/02 ,  F03D7/04 ,  G05B19/042 ,  H02J3/38

CPC classification number: F03D7/0284 ,  F03D7/026 ,  F03D7/0272 ,  F03D7/048 ,  F05B2220/706 ,  F05B2270/1033 ,  F05B2270/309 ,  F05B2270/327 ,  F05B2270/335 ,  G05B19/042 ,  G05B2219/2619 ,  H02J3/386 ,  Y02E10/723 ,  Y02E10/763

Abstract: A method and associated control arrangement are disclosed for controlling a power output of a wind power plant (WPP) according to a predetermined power ramp rate limit, the WPP comprising a plurality of wind turbine generators (WTGs). The method comprises receiving a first signal indicating that a first WTG is in a ready state to begin producing power. The method further comprises, upon determining that, responsive to the received first signal, beginning power production of the first WTG at a predetermined default power ramp rate would cause the power output of the WPP to exceed the power ramp rate limit, controlling power production of the first WTG using at least one of: a first delay, a power ramp rate reference less than the default power ramp rate, and a power reference less than a nominal power output of the first WTG.

公开(公告)号：US20180269687A1

公开(公告)日：2018-09-20

申请号：US15462136

申请日：2017-03-17

Applicant: General Electric Technology GmbH

Inventor： Reza Ghaemi ,  Masoud Abbaszadeh ,  Chaitanya Ashok Baone ,  Naresh Acharya

IPC: H02J3/38 ,  H02J13/00

CPC classification number: H02J3/383 ,  H02J3/00 ,  H02J3/386 ,  H02J13/0006 ,  H02J2003/003 ,  H02J2003/007 ,  H02J2003/146 ,  Y02E10/563 ,  Y02E10/763 ,  Y02E40/72 ,  Y04S10/123

Abstract: The technology described herein is generally directed towards a distributed optimization technology for the control of aggregation of distributed flexibility resource nodes that operates iteratively until a commanded power profile is produced by aggregated loads. The technology uses a distributed iterative solution in which each node solves a local optimization problem with local constraints and states, while using a global Lagrange multiplier that is based upon information from each other node. The global Lagrange multiplier is determined at an aggregation level using load-specific information that is obtained in a condensed form (e.g., a scalar) from each node at each iteration. The global Lagrange multiplier is broadcasted to the nodes for each new iteration. The technology provides an iterative, distributed solution to the network optimization problem of power tracking of aggregated loads.

公开(公告)号：US10075114B2

公开(公告)日：2018-09-11

申请号：US15059343

申请日：2016-03-03

Applicant: General Electric Company

Inventor： Harold Robert Schnetzka ,  Anthony Michael Klodowski ,  Sidney Allen Barker

IPC: H02P11/00 ,  H02P9/00 ,  H02P9/42 ,  F03D9/00

CPC classification number: H02P9/007 ,  F03D7/0272 ,  F05B2270/327 ,  H02J3/386 ,  H02P9/42 ,  Y02E10/723 ,  Y02E10/725 ,  Y02E10/763

Abstract: The present subject matter is directed to a system and method for operating an electrical power circuit connected to a power grid. The electrical power circuit has a power converter electrically coupled to a generator. The method includes monitoring a rotor speed of the generator during operation of the electrical power circuit. The method also includes increasing an operating range of the rotor speed of the generator. Further, the method includes determining at least one of a line-side voltage of a line-side converter of the power converter or a rotor-side voltage of a rotor-side converter of the power converter during operation of the electrical power circuit. Another step include controlling, via a converter controller, a DC link voltage of a DC link of the power converter as a function of one or more of the line-side voltage, the rotor-side voltage, and/or the rotor speed.

公开(公告)号：US10063060B2

公开(公告)日：2018-08-28

申请号：US14889413

申请日：2014-04-29

Applicant: Wobben Properties GmbH

Inventor： Alfred Beekmann ,  Kai Busker

IPC: H02J1/00 ,  H02J3/38 ,  F03D7/04 ,  H02J3/48 ,  H02J3/50 ,  F03D7/02 ,  H02M7/04 ,  H02M7/44 ,  H02P9/04

CPC classification number: H02J3/386 ,  F03D7/0284 ,  F03D7/048 ,  F05B2270/337 ,  H02J3/48 ,  H02J3/50 ,  H02M7/04 ,  H02M7/44 ,  H02P9/04 ,  Y02E10/721 ,  Y02E10/723 ,  Y02E10/763

Abstract: The invention relates to a method for feeding electric power from at least one wind power installation or of a wind farm into an electric supply system having a line voltage and a grid frequency, wherein the method for feeding electric active power and electric reactive power is prepared and the active power that is fed in can be adjusted by means of an active power control as a function of a grid state and/or the reactive power that is fed in can be adjusted by means of a reactive power control as a function of at least one grid state and the active power control or the reactive power control respectively specify a target value that is to be fed in, which value is adjusted by means of an adjustment function as a function of at least one grid state, wherein the adjustment function is specified with the help of points of support, which points are defined by pairs of values each of which comprise a value for the active power or the reactive power respectively, and a value for the grid state.

公开(公告)号：US10044186B2

公开(公告)日：2018-08-07

申请号：US14911180

申请日：2014-07-15

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Philip Carne Kjær

IPC: H02J3/02 ,  H02J3/38

CPC classification number: H02J3/02 ,  H02J3/386 ,  Y02E10/763

Abstract: A conventional cable comprises three conductive cores, each provided with a respective conductive sheath which are together housed within an outer insulating sheath. The three-core cable is used to transmit electric power in the form of dc current and single-phase ac current. A first one of the conductive cores is used to transmit dc current, while a second conductive core is used to transmit the return dc current. The third conductive core is used to transmit the single-phase ac current. The return ac current is transmitted along all three conductive outer sheaths in parallel. The cable is used to transmit dc current from a wind turbine generator to a substation where it is converted to ac before connecting to the mains electricity grid. The ac current is used to power auxiliary circuitry of the wind turbine generator when the output of the turbine generator falls below a give value.

公开(公告)号：US20180219382A1

公开(公告)日：2018-08-02

申请号：US15747588

申请日：2015-11-10

Applicant: Siemens Aktiengesellschaft

Inventor： Robert J. Nelson ,  Najlae Yazghi

IPC: H02J3/38 ,  H02J3/18

CPC classification number: H02J3/386 ,  G05F1/44 ,  H02J3/18 ,  Y02E10/763

Abstract: A system and method for regulating a voltage at a point of common coupling (35) (PCC) of a distributed energy resource farm (1) connected to an electrical power grid (37). The distributed energy resource farm includes a plurality of connected distributed energy resources (2, 3) each supplying a terminal voltage. The system includes a component (50) for measuring a PCC voltage at the PCC, and another component (39, 41) for determining a first value based on a relationship between a scheduled voltage at the PCC and the measured PCC voltage relative to a dead band voltage region (66). A further component (39, 41) regulates the voltage at the point of common coupling by controlling the terminal voltage of each one of the plurality of distributed energy resources in response to the relationship between the scheduled voltage and the measured voltage at the PCC.

公开(公告)号：US20180219376A1

公开(公告)日：2018-08-02

申请号：US15746632

申请日：2016-07-13

Applicant: Wobben Properties GmbH

Inventor： Christian STRAFIEL ,  Sönke ENGELKEN ,  Ingo MACKENSEN ,  Stefan GERTJEGERDES

IPC: H02J3/01 ,  H02M1/12 ,  G05B19/05 ,  G01R19/25 ,  G01R25/00 ,  F03D17/00 ,  F03D7/04 ,  F03D9/25

CPC classification number: H02J3/01 ,  F03D7/044 ,  F03D9/255 ,  F03D17/00 ,  G01R19/0084 ,  G01R19/2513 ,  G01R25/00 ,  G05B19/05 ,  G05B2219/13095 ,  H02J3/24 ,  H02J3/386 ,  H02M1/12 ,  Y02E10/725 ,  Y02E10/763

Abstract: A method for recording the magnitude and phase of the electrical voltage in an electrical three-phase supply network for a fundamental and at least one harmonic is provided. The method includes measuring an electrical three-phase voltage of the supply network, transforming the measured voltage values into polar coordinates using a rotating voltage phasor for the fundamental as a measured reference phasor, and respectively observing values of at least one voltage phasor for the fundamental and of at least one voltage phasor for at least one harmonic to be recorded with the aid of a state observer, and tracking the observed values on the basis of the measured reference phasor.