公开(公告)号：US20180366977A1

公开(公告)日：2018-12-20

申请号：US15623422

申请日：2017-06-15

Applicant: General Electric Company

Inventor： Govardhan Ganireddy ,  Saurabh Shukla ,  Anthony Michael Klodowski

IPC: H02J11/00 ,  H02P9/00 ,  F03D9/25 ,  H02K7/18

Abstract: A method for controlling an electrical power subsystem includes determining an auxiliary voltage error value based on a measured voltage of the low voltage distribution panel. The method further includes receiving an active current command. The method further includes calculating a switching pattern for a line-side converter of the power converter based on the auxiliary voltage error value and the active current command. A current level produced by the line-side converter controls a voltage to the low voltage distribution panel.

公开(公告)号：US10103665B2

公开(公告)日：2018-10-16

申请号：US15399824

申请日：2017-01-06

Applicant: General Electric Company

Inventor： Robert Gregory Wagoner ,  Govardhan Ganireddy ,  Saurabh Shukla ,  Ravisekhar Nadimpalli Raju ,  Harold Robert Schnetzka

IPC: H02P9/10 ,  H02K11/33 ,  F03D7/04 ,  H02K7/18 ,  H02P9/00 ,  H02M7/48 ,  H02M1/00 ,  H02M1/32

Abstract: Systems and methods for protecting the redundancy of inverter blocks are provided. In one example implementation, a system can include a plurality of inverter blocks. Each inverter block can include a first conversion entity configured to convert DC power to AC power, a second conversion entity configured to convert AC power to DC power, and a third conversion entity configured to convert DC power to AC power. An isolation transformer can be coupled between the first conversion entity and the second conversion entity. The system includes an inverter block switching element coupled to an output of each inverter block. A protection element is disposed in each inverter block. The system includes one or more control devices configured to isolate at least one of the plurality of inverter blocks based at least in part on a status of the protection element disposed in the inverter block.

公开(公告)号：US20180191166A1

公开(公告)日：2018-07-05

申请号：US15399001

申请日：2017-01-05

Applicant: General Electric Company

Inventor： Robert Gregory Wagoner ,  Govardhan Ganireddy ,  Saurabh Shukla ,  Rajni Kant Burra ,  Ravisekhar Nadimpalli Raju ,  Rui Zhou ,  Rajib Datta ,  John Leo Bollenbecker

IPC: H02J3/38 ,  H02M5/458 ,  H02M7/66 ,  H02M7/48 ,  H02J7/00

CPC classification number: H02J3/383 ,  H02J3/386 ,  H02J7/0068 ,  H02M7/49 ,  H02M7/797 ,  H02M2001/0058 ,  H02M2001/0077 ,  Y02B70/1483 ,  Y02B70/1491 ,  Y02E10/563 ,  Y02E10/763

Abstract: Power converters for use in energy systems are included. For instance, an energy system can include an input power source configured to provide a low voltage direct current power. The energy system can include a power converter configured to convert the low voltage direct current power provided by the input power source to a medium voltage multiphase alternating current output power suitable for provision to an alternating current power system. The power converter can include a plurality conversion modules. Each conversion module includes a plurality of bridge circuits. Each bridge circuit includes a plurality of silicon carbide switching devices coupled in series. Each conversion module is configured to provide a single phase of the medium voltage multiphase alternating current output power on a line bus of the energy system.

公开(公告)号：US10951030B2

公开(公告)日：2021-03-16

申请号：US16611007

申请日：2018-05-02

Applicant: General Electric Company

Inventor： Govardhan Ganireddy ,  Rajni Burra ,  Wei Ren ,  Anthony Michael Klodowski ,  Saurabh Shukla ,  Zhuohui Tan ,  Robert Gregory Wagoner

IPC: H02J3/18 ,  H02J3/38

Abstract: A method for reactive power control of a wind farm having a plurality of clusters of wind turbines with a cluster transformer connecting each cluster of wind turbines to a power grid is provided. The method includes receiving, via a plurality of cluster-level controllers, a reactive power command from a farm-level controller. The method also includes generating, via the cluster-level controllers, a cluster-level reactive current command for each cluster of wind turbines based on the reactive power command. Further, the method includes distributing, via the cluster-level controllers, a turbine-level reactive current command to turbine-level controllers of the wind turbines based on the cluster-level reactive current command.

公开(公告)号：US10784689B2

公开(公告)日：2020-09-22

申请号：US15588902

申请日：2017-05-08

Applicant: General Electric Company

Inventor： Govardhan Ganireddy ,  Saurabh Shukla ,  Rajni Burra ,  Robert Gregory Wagoner ,  Anthony Michael Klodowski ,  Yashomani Kolhatkar

IPC: H02J3/01 ,  H02J3/38 ,  H02M5/04 ,  H02M1/12 ,  H02M5/42

Abstract: An electrical power system includes a cluster of electrical power subsystems, each of the electrical power subsystems including a power converter electrically coupled to a generator having a generator rotor and a generator stator. Each of the electrical power subsystems defines a stator power path and a converter power path for providing power to the power grid. The converter power path includes a partial power transformer. The electrical power system further includes a subsystem breaker configured with each of the electrical power subsystems, and a cluster transformer for connecting each cluster of electrical power subsystems to the power grid. The electrical power system further includes a cluster power path extending between each subsystem breaker and the cluster transformer, and a distortion filter electrically coupled to the cluster transformer. The distortion filter reduces harmonics in current flowing from the electrical power subsystems to the cluster transformer.

公开(公告)号：US20200083710A1

公开(公告)日：2020-03-12

申请号：US16611007

申请日：2018-05-02

Applicant: General Electric Company

Inventor： Govardhan Ganireddy ,  Rajni Burra ,  Wei Ren ,  Anthony Michael Klodowski ,  Saurabh Shukla ,  Zhuohui Tan ,  Robert Gregory Wagoner

IPC: H02J3/18 ,  H02J3/38

Abstract: A method for reactive power control of a wind farm having a plurality of clusters of wind turbines with a cluster transformer connecting each cluster of wind turbines to a power grid is provided. The method includes receiving, via a plurality of cluster-level controllers, a reactive power command from a farm-level controller. The method also includes generating, via the cluster-level controllers, a cluster-level reactive current command for each cluster of wind turbines based on the reactive power command. Further, the method includes distributing, via the cluster-level controllers, a turbine-level reactive current command to turbine-level controllers of the wind turbines based on the cluster-level reactive current command.

公开(公告)号：US10587121B2

公开(公告)日：2020-03-10

申请号：US15602193

申请日：2017-05-23

Applicant: General Electric Company

Inventor： Govardhan Ganireddy ,  Saurabh Shukla ,  Rajni Burra ,  Steven Wade Sutherland

IPC: H02J3/38 ,  H02M5/42 ,  F03D9/25 ,  H02H7/12

Abstract: An electrical power system includes a cluster of electrical power subsystems, each of the electrical power subsystems including a power converter electrically coupled to a generator having a generator rotor and a generator stator. Each of the electrical power subsystems defines a stator power path and a converter power path for providing power to the power grid, the converter power path including a partial power transformer. Each of the electrical power subsystems further includes a low voltage distribution panel electrically coupled to the converter power path, a first switch on the stator power path, and a second switch on the converter power path.

公开(公告)号：US10439533B2

公开(公告)日：2019-10-08

申请号：US15399049

申请日：2017-01-05

Applicant: General Electric Company

Inventor： Robert Gregory Wagoner ,  Govardhan Ganireddy ,  Saurabh Shukla ,  Rajni Kant Burra ,  Ravisekhar Nadimpalli Raju ,  Rui Zhou ,  Rajib Datta ,  John Leo Bollenbecker

IPC: H02P9/00 ,  F03D9/25 ,  H02M3/335 ,  H02M3/337 ,  H02M5/458 ,  H02M1/00

Abstract: Power converters for use in wind turbine systems are included. For instance, a wind turbine system can include a wind driven doubly fed induction generator having a stator and a rotor. The stator is configured to provide a medium voltage alternating current power on a stator bus of the wind turbine system. The wind turbine system includes a power converter configured to convert a low voltage alternating current power provided by the rotor to a medium voltage multiphase alternating current output power suitable for provision to an electrical grid. The power converter includes a plurality conversion modules. Each conversion module includes a plurality of bridge circuits. Each bridge circuit includes a plurality of silicon carbide switching devices coupled in series. Each conversion module is configured to provide a single phase of the medium voltage multiphase alternating current output power on a line bus of the wind turbine system.

公开(公告)号：US20190181632A1

公开(公告)日：2019-06-13

申请号：US15834360

申请日：2017-12-07

Applicant: General Electric Company

Inventor： Rajni Kant Burra ,  Randal Voges ,  Saurabh Shukla ,  Govardhan Ganireddy ,  Baraa Kadhum

IPC: H02H7/06 ,  F03D17/00 ,  H02J3/38 ,  H02P9/00

Abstract: A method for isolating faults in an electrical power system connected to a power grid includes dividing the electrical power system into a plurality of power modules each including a plurality of electrical power subsystems and a substation. Each of the electrical power subsystems defines a stator power path and a converter power path for providing power to the power grid and having a partial power transformer. The method also includes coupling each of the power modules to the power grid via a primary electrical line. Further, the method includes monitoring the electrical power system for faults. In response to detecting a fault in one of the power modules, the method includes isolating the fault to the power module experiencing the fault. In contrast, if the fault is detected in the primary electrical line or the power grid, the method includes tripping the electrical power system.

公开(公告)号：US20180294650A1

公开(公告)日：2018-10-11

申请号：US15482072

申请日：2017-04-07

Applicant: General Electric Company

Inventor： Saurabh Shukla ,  Govardhan Ganireddy ,  John Leo Bollenbecker ,  Rajni Burra

IPC: H02J3/38 ,  H02M5/42 ,  H02P13/06 ,  H02P9/00 ,  H02K7/18 ,  F03D9/25

Abstract: Systems and methods for operating a cluster transformer operably coupled to cluster of DFIG wind turbines in low-wind conditions are provided. A wind turbine cluster system can include at least one DFIG module, a cluster transformer, and a control device configured to control operation of the cluster transformer based at least in part on a wind parameter. Each DFIG module can include a doubly fed induction generator comprising a rotor configured to generate AC power at a first voltage, a stator configured to generate AC power at a second voltage, and a power conversion system coupled to the rotor to convert power at the first voltage to power at the second voltage. The cluster transformer can be configured to receive power at the second voltage from the at least one DFIG module and convert the power at the second voltage to power at a third voltage.