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公开(公告)号：US11493026B2
公开(公告)日：2022-11-08
申请号：US16880450
申请日：2020-05-21
Applicant: General Electric Company
Inventor： Govardhan Ganireddy , Steven Wade Sutherland , Rajni Kant Burra , Andrej Petricko , Dale Robert Mashtare
IPC: F03D80/80 , F03D9/25 , H02K7/18 , H02P9/00 , H02P101/15
Abstract: An electrical system for a wind turbine having a reduced uptower footprint and method for achieving the same are provided. Accordingly, the electrical system includes a plurality of electrical subsystems having a plurality of electrical subsystem assemblies. At least one electrical subsystem assembly is integrated with the generator housing. Additionally, the electrical subsystem assembly is coupled between the stator or the rotor of the generator and the generator output connection. The electrical system incorporating the electrical subsystem assembly with the generator housing has a reduced uptower footprint relative to a nominal design of an electrical system.
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公开(公告)号：US10826297B2
公开(公告)日：2020-11-03
申请号：US16181828
申请日：2018-11-06
Applicant: General Electric Company
Inventor： Govardhan Ganireddy , Biao Fang , Rajni Kant Burra
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.
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公开(公告)号：US10763674B2
公开(公告)日：2020-09-01
申请号：US15719923
申请日：2017-09-29
Applicant: General Electric Company
Inventor： Govardhan Ganireddy , Rajni Kant Burra , Deepak Raj Sagi
IPC: G05B11/01 , H02J3/38 , H02K1/22 , H02K1/12 , F03D9/25 , G05B15/02 , F03D7/02 , H02J3/46 , F03D7/04 , H02J3/18 , H02P9/00
Abstract: An electrical power system includes a system-level controller and a plurality of clusters of subsystems defining 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 system further includes a cluster transformer connecting each cluster to the power grid and a plurality of cluster-level controllers communicatively coupled with the system-level controller. Each of the clusters is communicatively coupled with one of the cluster-level controllers. Thus, the system-level controller regulates system-level active and/or reactive power based on required active or reactive power for the system, respectively, and compares the system-level active or reactive power with preferred values thereof. Further, the system-level controller receives feedback signal(s) from the cluster-level controllers, generates cluster-level power command(s) based on the comparison and the feedback signal(s), and sends the cluster-level power commands to the cluster-level controllers.
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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
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.
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5.发明申请公开(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
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.
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Patent Agency Ranking
6.发明授权公开(公告)号：US10027118B2
公开(公告)日：2018-07-17
申请号：US15158746
申请日：2016-05-19
Applicant: General Electric Company
Inventor： Enno Ubben , Alfredo Sebastian Achilles , Mark Edward Cardinal , Rajni Kant Burra , Matthew Paul Richwine , Patrick Djan-Sampson
Abstract: The present disclosure is directed to a system and method for balancing reactive power loading between multiple renewable energy power systems coupled to a power grid at a point of regulation (POR). The method includes determining a voltage error based on a voltage reference and a measured voltage at the POR. The method also includes measuring at least one operating condition from each of the power systems. Further, the method includes determining a per unit actual reactive power for each of the power systems based on at least one of the actual operating conditions and determining a per unit average reactive power from the power systems based on at least one of the actual operating conditions. Thus, the method also includes determining a voltage reference command for each of the power systems as a function of the voltage error, the per unit reactive power, and/or the per unit average reactive power.
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7.发明申请公开(公告)号：US20170338652A1
公开(公告)日：2017-11-23
申请号：US15158746
申请日：2016-05-19
Applicant: General Electric Company
Inventor： Enno Ubben , Alfredo Sebastian Achilles , Mark Edward Cardinal , Rajni Kant Burra , Matthew Paul Richwine , Patrick Djan-Sampson
CPC classification number: H02J3/18 , F03D7/028 , F03D7/048 , F05B2270/335 , H02J3/1821 , H02J3/383 , H02J3/386 , Y02E10/763 , Y02E40/30
Abstract: The present disclosure is directed to a system and method for balancing reactive power loading between multiple renewable energy power systems coupled to a power grid at a point of regulation (POR). The method includes determining a voltage error based on a voltage reference and a measured voltage at the POR. The method also includes measuring at least one operating condition from each of the power systems. Further, the method includes determining a per unit actual reactive power for each of the power systems based on at least one of the actual operating conditions and determining a per unit average reactive power from the power systems based on at least one of the actual operating conditions. Thus, the method also includes determining a voltage reference command for each of the power systems as a function of the voltage error, the per unit reactive power, and/or the per unit average reactive power.
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公开(公告)号：US11451057B2
公开(公告)日：2022-09-20
申请号：US16647213
申请日：2017-09-15
Applicant: General Electric Company , Rajni Kant Burra , Govardhan Ganireddy , Anthony Michael Klodowski , Wenqiang Yang
Inventor： Rajni Kant Burra , Govardhan Ganireddy , Anthony Michael Klodowski , Wenqiang Yang
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.
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公开(公告)号：US20210363971A1
公开(公告)日：2021-11-25
申请号：US16880450
申请日：2020-05-21
Applicant: General Electric Company
Inventor： Govardhan Ganireddy , Steven Wade Sutherland , Rajni Kant Burra , Andrej Petricko , Dale Robert Mashtare
Abstract: An electrical system for a wind turbine having a reduced uptower footprint and method for achieving the same are provided. Accordingly, the electrical system includes a plurality of electrical subsystems having a plurality of electrical subsystem assemblies. At least one electrical subsystem assembly is integrated with the generator housing. Additionally, the electrical subsystem assembly is coupled between the stator or the rotor of the generator and the generator output connection. The electrical system incorporating the electrical subsystem assembly with the generator housing has a reduced uptower footprint relative to a nominal design of an electrical system.
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10.发明申请公开(公告)号：US20210067073A1
公开(公告)日：2021-03-04
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
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.
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