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：US10468881B2

公开(公告)日：2019-11-05

申请号：US15609458

申请日：2017-05-31

Applicant: General Electric Company

Inventor： Robert Gregory Wagoner ,  David Smith ,  Govardhan Ganireddy

IPC: H02J3/01 ,  H02M1/12 ,  H02M5/12 ,  H02M5/44 ,  H02J3/38

Abstract: An electrical power system connectable to a power grid includes a plurality of electrical power subsystems, each of the plurality of electrical power subsystems including a power converter electrically coupled to a generator having a generator rotor and a generator stator. The electrical power system further includes an intermediate power path extending from each of the plurality of electrical power subsystems for providing power from each of the plurality of electrical power subsystems to the power grid. The electrical power system further includes a zig-zag transformer electrically coupling each of the plurality of intermediate power paths to the power grid, the zig-zag transformer including a primary winding and a plurality of secondary windings, each of the plurality of secondary windings connected to one of the plurality of intermediate power paths, and wherein at least one of the plurality of secondary windings is a zig-zag winding.

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：US20190207541A1

公开(公告)日：2019-07-04

申请号：US15857881

申请日：2017-12-29

Applicant: General Electric Company

Inventor： Cornelius Edward Holliday ,  Robert Gregory Wagoner ,  David Smith

IPC: H02P9/00 ,  H02K7/18

CPC classification number: H02P9/007 ,  H02K7/183 ,  H02P9/006 ,  H02P2101/15

Abstract: A method for controlling temperature of a switching device of a power converter of an electrical power system includes monitoring, via one or more sensors, at least one operating condition of the electrical power system. Further, the method includes monitoring a temperature of the switching device. Moreover, the method includes controlling, via a control system communicatively coupled to the one or more sensors, torque of a generator of the electrical power system based on the at least one operating condition of the electrical power system so as maintain the temperature of the switching device below a predetermined threshold.

公开(公告)号：US20190158001A1

公开(公告)日：2019-05-23

申请号：US15817502

申请日：2017-11-20

Applicant: General Electric Company

Inventor： Robert Gregory Wagoner ,  David Smith

IPC: H02P9/00 ,  H02P9/10

Abstract: A DFIG power system defines a generator power path and a converter power path. The generator power path has a DFIG with a rotor and a stator. The converter power path has a power converter with a rotor-side converter coupled to a line-side converter via a DC link. The power converter has at least two power bridge circuits connected in parallel. A method of operating the DFIG power system includes monitoring, via one or more sensors, at least one electrical condition thereof. The method also includes comparing, via a control system, the at least one electrical condition to a predetermined threshold, the predetermined threshold being indicative of an occurrence of a transient overloading event. Further, the method includes alternating between non-interleaving and interleaving intervals if the at least one electrical condition exceeds the predetermined threshold so as to reduce harmonics of the DFIG power system.

公开(公告)号：US20180351358A1

公开(公告)日：2018-12-06

申请号：US15609458

申请日：2017-05-31

Applicant: General Electric Company

Inventor： Robert Gregory Wagoner ,  David Smith ,  Govardhan Ganireddy

IPC: H02J3/01

CPC classification number: H02J3/01 ,  H02J3/386 ,  H02M1/12 ,  H02M5/12 ,  H02M5/44

Abstract: An electrical power system connectable to a power grid includes a plurality of electrical power subsystems, each of the plurality of electrical power subsystems including a power converter electrically coupled to a generator having a generator rotor and a generator stator. The electrical power system further includes an intermediate power path extending from each of the plurality of electrical power subsystems for providing power from each of the plurality of electrical power subsystems to the power grid. The electrical power system further includes a zig-zag transformer electrically coupling each of the plurality of intermediate power paths to the power grid, the zig-zag transformer including a primary winding and a plurality of secondary windings, each of the plurality of secondary windings connected to one of the plurality of intermediate power paths, and wherein at least one of the plurality of secondary windings is a zig-zag winding.

公开(公告)号：US20180323618A1

公开(公告)日：2018-11-08

申请号：US15587437

申请日：2017-05-05

Applicant: General Electric Company

Inventor： Robert Gregory Wagoner ,  Harold Robert Schnetzka ,  John Leo Bollenbecker ,  Govardhan Ganireddy

IPC: H02J3/38 ,  H02M5/458 ,  H02J3/18 ,  H02J3/01

CPC classification number: H02J3/386 ,  H02J3/01 ,  H02J3/18 ,  H02M5/458 ,  H02M2001/0009

Abstract: An electrical power system connectable to a power grid 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. Each of the electrical power subsystems further includes a transformer. The system further includes a subsystem breaker configured with each of the electrical power subsystems, and a cluster power path extending from each subsystem breaker for connecting the cluster of electrical power subsystems to the power grid. The system further includes a reactive power compensation inverter electrically coupled within the electrical power system, the reactive power compensation inverter operable to increase the reactive power level in the electrical current flowing to the power grid.

公开(公告)号：US10104814B2

公开(公告)日：2018-10-16

申请号：US14531128

申请日：2014-11-03

Applicant: General Electric Company

Inventor： Robert Gregory Wagoner ,  Paul Stephen Pate ,  Harold Robert Schnetzka

IPC: H05K7/20

Abstract: Systems and methods for cooling one or more electrical components of a current conversion device of a renewable energy power system (e.g. a wind turbine or a solar power system) are disclosed. In one embodiment, the system includes an immersion tank comprising a cooling medium, a heat exchanger, and a pumping device. One or more of the electrical components are at least partially submerged within the cooling medium, which has a predetermined dielectric constant. The heat exchanger is in fluid communication with the cooling medium of the immersion tank. Thus, the pumping device is configured to circulate the cooling medium between the immersion tank and the heat exchanger to remove heat from the one or more electrical components.

公开(公告)号：US10103663B1

公开(公告)日：2018-10-16

申请号：US15489919

申请日：2017-04-18

Applicant: General Electric Company

Inventor： Robert Gregory Wagoner ,  Cornelius Edward Holliday, III

IPC: H02P9/00 ,  H02P3/00 ,  F03D9/25 ,  H02M5/458 ,  H02H7/12 ,  H02P101/15

Abstract: Systems and methods for protecting switching devices in a power converter in doubly fed induction generator power systems are provided. A DFIG system can include a DFIG generator and a power converter comprising a line side converter and a rotor side converter connected by a DC bus. Each of the line side converter and rotor side converter can include a plurality of bridge circuits. Each bridge circuit can include a plurality of switching devices. A method can include monitoring, by a control device, a voltage of the DC bus of the power converter. The method can further include implementing, by the control device, a switching device protection measure based at least in part on the voltage of the DC bus of the power converter. The switching device protection measure can be operable to protect the switching devices by operating the switching devices within a safe operating area.

公开(公告)号：US10027240B1

公开(公告)日：2018-07-17

申请号：US15399817

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: H02M5/458 ,  H02M1/084 ,  H02M1/12 ,  H02H7/12 ,  H05K7/20 ,  H02M1/00

Abstract: Systems and methods for grounding power generation units with silicon carbide MOSFET power converters are provided. A power generation unit can include a power generator configured to generate multiphase alternating current power at a first voltage. The power generation unit can also include a power converter configured to convert the multiphase alternating current power from the power generator at the first voltage to multiphase alternating current power at a second voltage. The power converter can include one or more silicon carbide MOSFETs and at least one heatsink configured to remove heat from the power converter. The at least one heatsink of the power converter can be electrically connected to a local ground formed by one or more components of the power generation unit.