公开(公告)号：US10958200B1

公开(公告)日：2021-03-23

申请号：US16552062

申请日：2019-08-27

Applicant: General Electric Company

Inventor： Kasi Viswanadha Raju Gadiraju ,  Deepak Raj Sagi ,  Rajni Kant Burra

IPC: H02P9/10 ,  F03D17/00 ,  F03D7/02 ,  F03D7/04 ,  H02J3/38 ,  H02P9/00 ,  F03D9/11 ,  F03D1/00 ,  H02P101/15

Abstract: A method for operating a wind turbine power system that supplies real and reactive power to a grid includes operating a generator of the wind turbine power system up to a first speed limit. The method also includes monitoring a wind speed at the wind turbine power system. When the wind speed drops below a predetermined threshold, the method includes reducing the first speed limit of the generator to a reduced speed limit of the generator. Further, the method includes operating the generator at the reduced speed limit for as long as the wind speed remains below the predetermined threshold so as to optimize a tip-speed-ratio of the wind turbine power system during low wind speeds, thereby increasing power production of the wind turbine power system at low wind speeds.

公开(公告)号：US10931115B1

公开(公告)日：2021-02-23

申请号：US16587413

申请日：2019-09-30

Applicant: General Electric Company

Inventor： Arvind Kumar Tiwari ,  Rajni Kant Burra ,  Robert Gregory Wagoner

IPC: H02J3/38 ,  H02J3/46

Abstract: An electrical power system connectable to a power grid includes at least one cluster of electrical power subsystems. Each of the electrical power subsystems includes 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 electrical power system also includes a single cluster transformer connecting the at least one cluster of the electrical power subsystems to the power grid. The single cluster transformer includes a plurality of low-voltage (LV) primary windings and at least one medium-voltage/high-voltage secondary (MV/HV) winding.

公开(公告)号：US10819103B2

公开(公告)日：2020-10-27

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 ,  H02P9/00 ,  H02J3/38 ,  F03D9/25 ,  H02P29/024

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：US20200235577A1

公开(公告)日：2020-07-23

申请号：US16647213

申请日：2017-09-15

Applicant: General Electric Company

Inventor： Rajni Kant Burra ,  Govardhan Ganireddy ,  Anthony Michael Klodowski ,  Wenqiang Yang

IPC: H02J3/16 ,  H02J3/38

Abstract: A method for controlling an electrical power system connected to a power grid includes receiving a reactive power command and a measured reactive power and generating a reactive power error signal based on a difference between the reactive power command and the measured reactive power. Further, the method includes receiving, via a reactive power regulator, the reactive power error signal. Moreover, the method includes generating, via the reactive power regulator, a voltage command based on the error signal. The method also includes generating, via a droop control, a voltage droop signal. In addition, the method includes generating a voltage error signal as a function of the voltage droop signal and at least one of the voltage command or a measured terminal voltage. Thus, the method further includes generating, via a voltage regulator, a reactive current command based on the voltage error signal.

公开(公告)号：US20200144826A1

公开(公告)日：2020-05-07

申请号：US16181828

申请日：2018-11-06

Applicant: General Electric Company

Inventor： Govardhan Ganireddy ,  Biao Fang ,  Rajni Kant Burra

IPC: H02J3/38 ,  H02M5/42 ,  H02K7/18 ,  H01F27/08 ,  F03D9/25 ,  F03D80/60 ,  F03D80/80

Abstract: Systems and methods of wind power generation in electrical power systems are described. According to one aspect, a wind turbine system can include a down tower portion having a main transformer configured to transform medium voltage power to another voltage power, a tower portion having one or more medium voltage cables configured to transmit medium voltage power, and, a nacelle portion. The nacelle portion can include a generator comprising a stator and a rotor. The stator may be connected to one or more medium voltage cables via a stator power path. The nacelle portion also includes a power converter coupled to the rotor of the generator, and, a step-up transformer coupled to the power converter and the one or more medium voltage cables. The step-up transformer can be configured to step-up low voltage power to medium voltage power.

公开(公告)号：US10570882B2

公开(公告)日：2020-02-25

申请号：US15810269

申请日：2017-11-13

Applicant: General Electric Company

Inventor： Edward Wayne Hardwicke, Jr. ,  Robert Gregory Wagoner ,  Harold Robert Schnetzka ,  Samir Salamah ,  Rajni Kant Burra ,  Vaidhya Nath Venkitanarayanan

IPC: F03D7/02 ,  F03D7/04 ,  H02J3/38 ,  H02J3/48 ,  H02J3/50

Abstract: A control method for dynamically controlling active and reactive power capability of a wind farm includes obtaining one or more real-time operating parameters of each of the wind turbines. The method also includes obtaining one or more system limits of each of the wind turbines. Further, the method includes measuring at least one real-time wind condition at each of the wind turbines. Moreover, the method includes continuously calculating an overall maximum active power capability and an overall maximum reactive power capability for each of the wind turbines as a function of the real-time operating parameters, the system limits, and/or the real-time wind condition. Further, the method includes generating a generator capability curve for each of the wind turbines using the overall maximum active and reactive power capabilities and communicating the generator capability curves to a farm-level controller of the wind farm that can use the curves to maximize the instantaneous power output of the wind farm.

公开(公告)号：US20190145376A1

公开(公告)日：2019-05-16

申请号：US15810269

申请日：2017-11-13

Applicant: General Electric Company

Inventor： Edward Wayne Hardwicke, JR. ,  Robert Gregory Wagoner ,  Harold Robert Schnetzka ,  Samir Salamah ,  Rajni Kant Burra ,  Vaidhya Nath Venkitanarayanan

IPC: F03D7/02 ,  F03D7/04

Abstract: A control method for dynamically controlling active and reactive power capability of a wind farm includes obtaining one or more real-time operating parameters of each of the wind turbines. The method also includes obtaining one or more system limits of each of the wind turbines. Further, the method includes measuring at least one real-time wind condition at each of the wind turbines. Moreover, the method includes continuously calculating an overall maximum active power capability and an overall maximum reactive power capability for each of the wind turbines as a function of the real-time operating parameters, the system limits, and/or the real-time wind condition. Further, the method includes generating a generator capability curve for each of the wind turbines using the overall maximum active and reactive power capabilities and communicating the generator capability curves to a farm-level controller of the wind farm that can use the curves to maximize the instantaneous power output of the wind farm.

公开(公告)号：US10050447B2

公开(公告)日：2018-08-14

申请号：US14782397

申请日：2014-03-26

Applicant: General Electric Company

Inventor： Rajni Kant Burra ,  Avijit Saha ,  Venkatarao Ryali ,  Govardhan Ganireddy ,  Akshay Krishnamurty Ambekar ,  Deepak Raj Sagi

IPC: H02J1/10 ,  H02J3/38 ,  F03D7/04 ,  H02J3/48 ,  H02J3/50 ,  G05B19/042 ,  F03D9/25 ,  H02J13/00

Abstract: A multi-farm wind power dispatch management system is provided which includes wind turbine dispatch controllers for controlling wind power dispatch of respective wind farm components and wind farm dispatch management systems for receiving respective wind farm component operating parameters and generating respective farm-level operating parameters. The system also includes group dispatch management systems for receiving the farm-level operating parameters and generating respective group level operating parameters. The system also includes a master dispatch management system for receiving the group-level operating parameters; computing a real time output power generated by the wind farm components; determining a difference between the real time output power and a committed output power; and generating reference commands, based on the difference, for controlling at least one of, the wind farm component operating parameters, the farm-level operating parameters, the group level operating parameters, or combinations thereof to reduce the difference and dispatch the committed output power.

公开(公告)号：US20180191280A1

公开(公告)日：2018-07-05

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 ,  F03D9/00 ,  F03D9/25

CPC classification number: H02P9/007 ,  F03D9/25 ,  F03D9/255 ,  H02M3/335 ,  H02M3/33576 ,  H02M3/337 ,  H02M5/4585 ,  H02M2001/0077 ,  Y02E10/725

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：US09677540B2

公开(公告)日：2017-06-13

申请号：US14073892

申请日：2013-11-07

Applicant: General Electric Company

Inventor： Rajni Kant Burra ,  Govardhan Ganireddy ,  Victor Robert Abate ,  Keith Andrew Longtin ,  Herman Lucas Norbert Wiegman ,  Robert William Delmerico

IPC: F03D7/02

CPC classification number: F03D7/0204 ,  F05B2260/845 ,  F05B2270/107 ,  F05B2270/321 ,  F05B2270/337 ,  Y02E10/723

Abstract: A yaw backup system is provided. The yaw backup system includes an energy storage medium for storing auxiliary power. The yaw backup system also includes a yaw controller for coordinating delivery of power from the energy storage medium to a yaw motor for controlling a yaw angle of a wind turbine during grid loss conditions. The yaw controller executes the steps of receiving wind direction signals over time from a sensor, altering a tolerance level of a wind turbine based on changes in the wind direction signals over time and controlling delivery of power to the yaw motor from the auxiliary power of the energy storage medium based on the tolerance level to control the yaw angle for reducing a load on the wind turbine induced by wind.