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公开(公告)号：US10554044B2
公开(公告)日：2020-02-04
申请号：US15866601
申请日：2018-01-10
Applicant: General Electric Company
Inventor： Rajni Kant Burra , Robert Gregory Wagoner , Govardhan Ganireddy , Saurabh Shukla
Abstract: A method for optimizing reactive power generation of an electrical power system includes generating, via a plurality of cluster-level controllers, a cluster-level reactive power command for each cluster of electrical power subsystems based on a system-level reactive power command. The method also includes determining, via the cluster-level controllers, a subsystem-level reactive power command for each of the electrical power subsystems based on the cluster-level reactive power command. Further, the method includes evaluating, via a plurality of subsystem-level controllers, reactive power capability of a plurality of reactive power sources within each of the electrical power subsystems. Moreover, the method includes generating, via each of the subsystem-level controllers, an actual reactive power for each of the electrical power subsystems based on the evaluation by allocating a portion of the subsystem-level reactive power command to each of the plurality of reactive power sources.
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公开(公告)号：US20190214821A1
公开(公告)日：2019-07-11
申请号：US15866601
申请日：2018-01-10
Applicant: General Electric Company
Inventor： Rajni Kant Burra , Robert Gregory Wagoner , Govardhan Ganireddy , Saurabh Shukla
Abstract: A method for optimizing reactive power generation of an electrical power system includes generating, via a plurality of cluster-level controllers, a cluster-level reactive power command for each cluster of electrical power subsystems based on a system-level reactive power command. The method also includes determining, via the cluster-level controllers, a subsystem-level reactive power command for each of the electrical power subsystems based on the cluster-level reactive power command. Further, the method includes evaluating, via a plurality of subsystem-level controllers, reactive power capability of a plurality of reactive power sources within each of the electrical power subsystems. Moreover, the method includes generating, via each of the subsystem-level controllers, an actual reactive power for each of the electrical power subsystems based on the evaluation by allocating a portion of the subsystem-level reactive power command to each of the plurality of reactive power sources.
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公开(公告)号：US10205399B2
公开(公告)日：2019-02-12
申请号：US15405712
申请日：2017-01-13
Applicant: General Electric Company
Inventor： Dong Dong , Robert Gregory Wagoner , Govardhan Ganireddy , Ravisekhar Nadimpalli Raju
IPC: H02M5/458 , H02K11/33 , H02J3/38 , H02M3/335 , H02M7/797 , H02P9/00 , H02M7/48 , F03D7/04 , H02K7/18 , H02M7/5387 , H02M1/00 , F03D7/02
Abstract: Systems and methods for operating a power converter are provided. A DC to AC converter can include an inner converter and an outer converter. The inner converter can include an isolation transformer a first plurality of switching devices. The outer converter can include a second plurality of switching devices. A control method can include determining an output voltage of the outer converter. The control method can further include controlling operation of the inner converter based at least in part on the output voltage of the outer converter.
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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
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.
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公开(公告)号：US20180363628A1
公开(公告)日：2018-12-20
申请号：US15623493
申请日：2017-06-15
Applicant: General Electric Company
Inventor： Ryan Andrew Risdon , Jignesh Govindlal Gandhi , Mark Edward Cardinal , Govardhan Ganireddy , Arne Koerber
IPC: F03D7/04 , F03D7/02 , G05B19/416
Abstract: A method for operating a wind turbine during partial load operation includes determining a power output of the wind turbine. The method also includes determining whether the power output is below a rated power of the wind turbine. If the power output is at the rated power, the method includes maintaining a speed set point of the wind turbine equal to a rated speed set point. However, if the power output is below the rated power, then the method includes varying, via a controller, the speed set point of the wind turbine as a function of a torque of the wind turbine in a non-monotonic torque-speed relationship.
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Patent Agency Ranking
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
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.
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37.发明申请公开(公告)号：US20180219501A1
公开(公告)日：2018-08-02
申请号：US15422604
申请日：2017-02-02
Applicant: General Electric Company
Inventor： Robert Gregory Wagoner , Dong Dong , Govardhan Ganireddy , David Smith
CPC classification number: H02P9/007 , H02M1/08 , H02M1/44 , H02M3/33584 , H02M3/337 , H02M7/4807 , H02M7/49 , H02M2001/0058 , H02M2007/4815
Abstract: Systems and methods for operating a power converter with a plurality of inverter blocks with silicon carbide MOSFETs are provided. A converter can include a plurality of inverter blocks. Each inverter block can include a plurality of switching devices. The plurality of switching devices can include one or more silicon carbide MOSFETs. A control method can include providing, by a control system, one or more gating commands to a first inverter block in the plurality of inverter blocks. The control method can further include implementing, by the control system, a gating command delay to generate a first delayed gating command based at least in part on the one or more gating commands. The control method can further include providing, by the control system, the first delayed gating command to a second inverter block in the plurality of inverter blocks.
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公开(公告)号：US20180205335A1
公开(公告)日：2018-07-19
申请号：US15405712
申请日：2017-01-13
Applicant: General Electric Company
Inventor： Dong Dong , Robert Gregory Wagoner , Govardhan Ganireddy , Ravisekhar Nadimpalli Raju
IPC: H02P9/10 , H02M5/458 , H02M1/084 , H02M1/32 , H02J3/38 , F03D7/04 , H02P9/00 , H02K7/18 , H02K11/33
CPC classification number: H02M5/4585 , F03D7/0272 , F03D7/042 , H02J3/386 , H02K7/183 , H02K11/33 , H02M3/33584 , H02M5/458 , H02M7/4807 , H02M7/5387 , H02M7/797 , H02M2001/0032 , H02M2001/007 , H02P9/007 , Y02B70/16 , Y02E10/763
Abstract: Systems and methods for operating a power converter are provided. A DC to AC converter can include an inner converter and an outer converter. The inner converter can include an isolation transformer a first plurality of switching devices. The outer converter can include a second plurality of switching devices. A control method can include determining an output voltage of the outer converter. The control method can further include controlling operation of the inner converter based at least in part on the output voltage of the outer converter.
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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
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.
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40.发明授权公开(公告)号：US09866160B2
公开(公告)日：2018-01-09
申请号：US14955094
申请日：2015-12-01
Applicant: General Electric Company
Inventor： Zhuohui Tan , Jinping Gao , Rajni Kant Burra , Govardhan Ganireddy
CPC classification number: H02P9/007 , H02J3/386 , H02M5/4585 , H02P23/26 , Y02E10/763
Abstract: A system includes a source side converter for being electrically coupled to a generator of a power source, a line side converter for being electrically coupled to a power network, a DC link coupled between the source side converter and the line side converter, and a controller for generating source side switching signals based on a current or torque of the generator and a virtual impedance signal for system damping or reactive power compensation when at least one detected signal of the system is not normal. A method for controlling the system is also included.
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