公开(公告)号：US10348184B2

公开(公告)日：2019-07-09

申请号：US15675845

申请日：2017-08-14

Applicant: General Electric Company

Inventor： Shahid Ali ,  Ajith Kuttannair Kumar ,  Govardhan Ganireddy ,  Prashanth Manikumar Chennamsetty

IPC: H02M1/12 ,  H02M7/539 ,  H02M7/23 ,  H02M7/493 ,  H02M1/00

Abstract: A power system is presented. The power system includes a first converter including a first output terminal a first control unit coupled to the first converter, a second converter including a second output terminal, where the second converter is coupled in parallel to the first converter, and a second control unit coupled to the second converter. The second control unit is configured to measure a plurality of phase currents at the second output terminal, determine a harmonic current transmitted by the second converter based on single phase current of the plurality of measured phase currents, and change a time-period of at least one switching cycle of a carrier wave of the second converter based on the determined harmonic current to synchronize with a carrier wave of the first converter.

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：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：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.

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.