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1.发明申请公开(公告)号：US20200059176A1
公开(公告)日：2020-02-20
申请号：US16608949
申请日：2018-04-09
发明人： Govardhan Ganireddy , Arvind Kumar Tiwari , Yashomani Y Kolhatkar , Anthony Michael Klodowski , John Leo Bollenbecker , Harold Robert Schnetzka , Robert Gregory Wagoner , Veena Padmarao
摘要： 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：US10530237B2
公开(公告)日：2020-01-07
申请号：US15715336
申请日：2017-09-26
摘要： An energy storage system for use in a renewable energy power system is provided. More particularly, an energy storage system can be coupled to the DC bus of a power converter in a renewable energy power system. A switching power supply can be coupled between the energy storage device and the DC bus of the power converter. The switching power supply can include a bi-directional resonant DC to DC converter. The bi-directional resonant converter can include a plurality of switching elements, a resonant circuit coupled to the at least one switching element, and a filtering circuit coupled to the resonant circuit. The bi-directional resonant converter can be configured to accommodate power flow in at least two directions.
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公开(公告)号：US20190312502A1
公开(公告)日：2019-10-10
申请号：US15944828
申请日：2018-04-04
发明人： Govardhan Ganireddy , Harold Robert Schnetzka , Robert Gregory Wagoner , Amy Marlene Ridenour , Kapil Jha , Yashomani Y. Kolhatkar , Arvind Kumar Tiwari
摘要： Systems and methods for operating a power system having a doubly fed induction generator are provided. In example implementations, an electrical power system connected to a power grid can include a generator comprising a stator and a rotor, the stator connected to the power grid via a stator power path, and a power converter. The power converter can include a line-side converter coupled to the power grid via a converter power path and a rotor-side converter coupled to a rotor bus of the rotor and the line-side converter via a DC link, the rotor-side converter configured to convert a DC power on the DC link to an AC signal for the rotor bus. The power system can also include an active filter comprising one or more active controlled components, the active filter being coupled in parallel with the rotor-side converter to reduce harmonics of the electrical power system.
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公开(公告)号：US20180198393A1
公开(公告)日：2018-07-12
申请号：US15399824
申请日：2017-01-06
发明人： Robert Gregory Wagoner , Govardhan Ganireddy , Saurabh Shukla , Ravisekhar Nadimpalli Raju , Harold Robert Schnetzka
CPC分类号： H02P9/10 , H02K7/183 , H02K11/33 , H02M7/4807 , H02M2001/0077 , H02M2001/325 , H02P9/00 , H02P9/007 , H02P27/08
摘要： 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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公开(公告)号：US20180198392A1
公开(公告)日：2018-07-12
申请号：US15399803
申请日：2017-01-06
发明人： Robert Gregory Wagoner , Govardhan Ganireddy , Saurabh Shukla , Ravisekhar Nadimpalli Raju , Harold Robert Schnetzka
CPC分类号： H02P9/007 , F03D9/255 , H02K7/1838 , H02K11/02 , H02K11/40
摘要： Systems and methods for grounding power generation systems with silicon carbide MOSFET power converters are provided. A power generation system can include a power generator comprising a multiphase rotor configured to generate multiphase alternating current power at a first voltage and a power converter comprising one or more silicon carbide MOSFETs and an isolation transformer. The power converter can be 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 generation system can be electrically grounded to shunt a leakage current associated with the isolation transformer of the power converter to a ground.
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公开(公告)号：US09859808B2
公开(公告)日：2018-01-02
申请号：US15138335
申请日：2016-04-26
发明人： Robert Gregory Wagoner , Harold Robert Schnetzka , Lukas Mercer Hansen , Wayne Allen Schultz , Bennett Steven Sheron , Douglas Austin
CPC分类号： H02M5/458 , H02M3/33523 , H02M3/33576 , H02M3/33584 , H02M3/33592 , H02M7/5387 , Y02B70/1475 , Y02B70/1483
摘要： Systems and methods associated with example power converter systems are disclosed. For instance, a power converter system can include a power converter couplable to an input power source and configured to generate an output power substantially at a grid frequency. The power converter can include one or more inverter bridge circuits, each associated with an output phase of the power converter. Each inverter bridge circuit can include one or more first switching modules having a pair of switching elements coupled in series with one another, and an output coupled between the pair of switching elements. At least one switching element of each first switching module includes a reverse blocking transistor. The power converter further includes one or more input bridge circuits having a plurality of second switching modules coupled in parallel, each second switching module comprising a pair of silicon carbide transistors.
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公开(公告)号：US11081891B2
公开(公告)日：2021-08-03
申请号：US15587437
申请日：2017-05-05
摘要： 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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公开(公告)号：US10570882B2
公开(公告)日：2020-02-25
申请号：US15810269
申请日：2017-11-13
发明人： Edward Wayne Hardwicke, Jr. , Robert Gregory Wagoner , Harold Robert Schnetzka , Samir Salamah , Rajni Kant Burra , Vaidhya Nath Venkitanarayanan
摘要： 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.
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公开(公告)号：US10340829B2
公开(公告)日：2019-07-02
申请号：US15218121
申请日：2016-07-25
IPC分类号： F03D7/00 , H02P9/48 , F03D7/02 , F03D7/04 , H02K3/28 , H02P9/00 , H02P25/18 , F03D9/25 , H02P101/15 , H02P103/20 , H02P103/10
摘要： The present subject matter is directed to an electrical power circuit connected to a power grid and method of operating same. The electrical power circuit has a power converter electrically coupled to a generator, such as a doubly-fed induction generator, having a rotor and a stator. Thus, the method includes operating rotor connections of the rotor of the generator in a wye configuration during a first rotor speed operating range. Further, the method includes monitoring a rotor speed of the rotor of the generator. Thus, the method also includes transitioning the rotor connections of the rotor from the wye configuration to a delta configuration if the rotor speed changes to a second rotor speed operating range.
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公开(公告)号：US20190145376A1
公开(公告)日：2019-05-16
申请号：US15810269
申请日：2017-11-13
发明人： Edward Wayne Hardwicke, JR. , Robert Gregory Wagoner , Harold Robert Schnetzka , Samir Salamah , Rajni Kant Burra , Vaidhya Nath Venkitanarayanan
摘要： 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.
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