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公开(公告)号：WO2019051771A1
公开(公告)日：2019-03-21
申请号：PCT/CN2017/101882
申请日：2017-09-15
Applicant: GENERAL ELECTRIC COMPANY , BURRA, Rajni Kant , GANIREDDY, Govardhan , KLODOWSKI, Anthony Michael , YANG, Wenqiang
IPC: H02J3/16
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：WO2018204449A1
公开(公告)日：2018-11-08
申请号：PCT/US2018/030581
申请日：2018-05-02
Applicant: GENERAL ELECTRIC COMPANY
Inventor： WAGONER, Robert, Gregory , SCHNETZKA, Harold, Robert , BOLLENBECKER, John, Leo , GANIREDDY, Govardhan
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.
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3.发明申请
公开(公告)号：WO2018200178A1
公开(公告)日：2018-11-01
申请号：PCT/US2018/026656
申请日：2018-04-09
Applicant: GENERAL ELECTRIC COMPANY
Inventor： GANIREDDY, Govardhan , TIWARI, Arvind, Kumar , KOLHATKAR, Yashomani, Y. , KLODOWSKI, Anthony, Michael , BOLLENBECKER, John, Leo , SCHNETZKA, Harold, Robert , WAGONER, Robert, Gregory , PADMARAO, Veena
Abstract: A power generation system (100, 200, 300, 400) is presented. The power generation system includes a prime mover (102), a doubly-fed induction generator (DFIG) (104) having a rotor winding (126) and a stator winding (122), a rotor-side converter (106), a line-side converter (108), and a secondary power source (110, 401) electrically coupled to a DC-link (128). Additionally, the power generation system includes a control sub-system (112, 212, 312) having a controller, and a plurality of switching elements (130, and 132 or 201). The controller is configured to selectively control switching of one or more switching elements (130, and 132 or 201) based on a value of an operating parameter corresponding to at least one of the prime mover, the DFIG, or the secondary power source to connect the rotor-side converter in parallel to the line-side converter to increase an electrical power production by the power generation system.
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公开(公告)号：WO2018187358A1
公开(公告)日：2018-10-11
申请号：PCT/US2018/025935
申请日：2018-04-03
Applicant: GENERAL ELECTRIC COMPANY
Inventor： GANIREDDY, Govardhan , MUKHERJEE, Rupam , ALI, Shahid , KUMAR, Ajith, Kuttannair , SIVASUBRAMANIAM, Manthram , BOHORI, Adnan, Kutubuddin
Abstract: A power system (104) including at least one electrical machine (106), plurality of doubly fed induction machines (DFIMs) (118), a plurality of first power converters (112), and a speed regulation unit (121, 122) is presented. The electrical machine (106) includes a mechanical input end (108) and at least one of a first stator winding terminal (110) and a first rotor winding terminal (111). Each DFIM includes a second stator winding terminal (114), a second rotor winding terminal (116), and a mechanical output end (115). At least one of the first stator winding terminal and the first rotor winding terminal is coupled to one of first power converters (112) and the second rotor winding terminal of each DFIM is coupled to one of the first power converters. The speed regulation unit (121, 122) is coupled to at least one of the mechanical input end (108) and the mechanical output end (115).
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公开(公告)号：WO2018111290A1
公开(公告)日：2018-06-21
申请号：PCT/US2016/067070
申请日：2016-12-16
Applicant: GENERAL ELECTRIC COMPANY
Inventor： GANIREDDY, Govardhan , DATTA, Rajib
IPC: H02J3/38
Abstract: A wind farm is presented. The wind farm includes a plurality of wind turbine stations, where each wind turbine station includes a wind turbine and a generator sub-system. The generator sub-system includes a doubly-fed induction generator configured to generate an alternating current voltage and a wind turbine station power converter. The wind farm further includes a power collection sub-system that includes a power bus and a sub-station power converter. The wind farm also includes a control system configured to determine a wind speed metric, estimate a corresponding frequency metric, calculate a desirable frequency based on the wind speed metric and frequency compensation ranges of the wind turbine station power converters, and generate and communicate control commands to the sub-station power converter based on the desirable frequency to allow the sub-station power converter to update a line frequency of a power bus voltage based on the desirable frequency.
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Patent Agency Ranking
公开(公告)号：WO2017218931A1
公开(公告)日：2017-12-21
申请号：PCT/US2017/037935
申请日：2017-06-16
Applicant: GENERAL ELECTRIC COMPANY
Inventor： GANIREDDY, Govardhan , KOLWALKAR, Amol, Rajaram , RAMACHANDRAPANICKER, Somakumar , TIWARI, Arvind, Kumar , ARAMANEKOPPA, Sharath, Sridhar , TATIKONDA, Subbarao , KOLHATKAR, Yashomani, Y
Abstract: A power generation system (101) is disclosed. The power generation system includes an engine (106) coupled to a DFIG (108) and a PV power source (110) to supply a solar electrical power to the DFIG (108). The power generation system (101) also includes a controller (124) configured to operate the engine (106) at a first operating speed corresponding to a first determined efficiency of the engine for a first desired level of an engine power in a first operating condition; or operate the engine (106) at a second operating speed corresponding to a desired level of the second electrical power to be absorbed by a rotor winding and a second desired level of the engine power in a second operating condition, wherein the determined first efficiency is substantially close to a first maximum achievable efficiency of the engine (106). Method of operating the power generation system (101) is also disclosed.
Abstract translation: 公开了一种发电系统（101）。 发电系统包括耦合到DFIG（108）的发动机（106）和PV电源（110）以向DFIG（108）提供太阳能电力。 发电系统（101）还包括控制器（124），该控制器构造成以第一运行速度运行发动机（106），该第一运行速度对应于在第一运行条件下的发动机功率的第一期望水平的发动机的第一确定效率 ; 或以对应于要由转子绕组吸收的第二电力的期望水平和在第二操作条件下的第二期望水平的发动机功率的第二操作速度操作发动机（106），其中所确定的第一效率是 基本上接近发动机（106）的第一最大可实现效率。 还公开了操作发电系统（101）的方法。
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公开(公告)号：WO2018187645A1
公开(公告)日：2018-10-11
申请号：PCT/US2018/026386
申请日：2018-04-06
Applicant: GENERAL ELECTRIC COMPANY
Inventor： SHUKLA, Saurabh , GANIREDDY, Govardhan , BOLLENBECKER, John, Leo , BURRA, Rajni
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.
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公开(公告)号：WO2018132236A1
公开(公告)日：2018-07-19
申请号：PCT/US2017/067640
申请日：2017-12-20
Applicant: GENERAL ELECTRIC COMPANY
Inventor： DONG, Dong , WAGONER, Robert, Gregory , GANIREDDY, Govardhan , RAJU, Ravisekhar, Nadimpalli , ZHOU, Rui
IPC: H02M7/5387 , H02M7/219 , H02M1/08 , H02M1/00
Abstract: Systems and methods for operating a power converter with a plurality of inverter blocks with silicon carbide MOSFETs are provided. A DC to AC converter can include a plurality of inverter blocks. Each inverter block can include a plurality of switching devices. A control method can include identifying one of a plurality of switching patterns for operation of the inverter block for each inverter block. Each switching pattern can include a plurality of switching commands. The control method can further include controlling each inverter block based on the identified switching pattern for the inverter block. The control method can further include rotating the switching patterns among the plurality of inverter blocks.
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公开(公告)号：WO2018128856A1
公开(公告)日：2018-07-12
申请号：PCT/US2017/068191
申请日：2017-12-22
Applicant: GENERAL ELECTRIC COMPANY
Inventor： WAGONER, Robert Gregory , GANIREDDY, Govardhan , SHUKLA, Saurabh , RAJU, Ravisekhar Nadimpalli , SCHNETZKA, Harold Robert
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.
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公开(公告)号：WO2018128819A1
公开(公告)日：2018-07-12
申请号：PCT/US2017/067628
申请日：2017-12-20
Applicant: GENERAL ELECTRIC COMPANY
Inventor： WAGONER, Robert, Gregory , GANIREDDY, Govardhan , SHUKLA, Saurabh , BURRA, Rajni, Kant , RAJU, Ravisekhar, Nadimpalli , ZHOU, Rui , DATTA, Rajib , BOLLENBECKER, John, Leo
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 rotor. The stator is configured to provide a medium voltage alternating current power on a siator 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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