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公开(公告)号：EP4138292A1
公开(公告)日：2023-02-22
申请号：EP22190605.0
申请日：2022-08-16
发明人： Michener, Nathaniel Robert , Ramirez Sanchez, Fernando Arturo , Sutherland, Steven Wade , Wagoner, Robert Gregory , Bhupathi, Rajesh , Berroteran, Igor
摘要： A method for operating a multi-level bridge power converter includes providing a plurality of switching devices of the power converter in one of a neutral point clamped topology or an active neutral point clamped topology. The method also includes providing a plurality of deadtimes for the switching devices. Further, the method includes selecting one of the deadtimes for each of the switching devices such that at least two of the switching devices operate according to different deadtimes. Moreover, the method includes operating the switching devices at the selected deadtimes to allow a first group of the switching devices to switch slower than a second group of the switching devices such that the first group of the switching devices satisfy safe operating requirements while the second group of the switching devices switch faster than the first group.
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公开(公告)号：EP3961029A1
公开(公告)日：2022-03-02
申请号：EP21192801.5
申请日：2021-08-24
发明人： Holliday, III, Cornelius Edward , Ramirez Sanchez, Fernando Arturo , Angel, Mathew Doyle , Killeen, Nathan Michael , Hardwicke, Jr., Edward Wayne , Sutherland, Steven Wade , Wagoner, Robert Gregory , Ganireddy, Govardhan , Haque, Talha Irfanul
摘要： A system and method are provided for controlling a wind turbine. Accordingly, a controller of the wind turbine detects a loss of traction of the slip coupling between a generator and a rotor of the drivetrain of the wind turbine. In response to detecting the loss of traction, the controller overrides a generator torque setpoint to alter a rotational speed of the generator. In response to the altered rotational speed of the generator, the traction of the slip coupling is increased. Increasing the traction of the slip coupling facilitates an application of generator torque to the drivetrain of the wind turbine.
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公开(公告)号：EP4024648A1
公开(公告)日：2022-07-06
申请号：EP21214789.6
申请日：2021-12-15
摘要： A system and method are provided for operating a power generating asset electrically coupled to a power grid. The power generating asset includes a power converter having a line-side converter operably coupled to the power grid via a converter contactor. Accordingly, a line-side converter of the power converter is decoupled from the power grid and a controller determines the phase angle of the grid voltage. A switching sequence for a plurality switching devices of the line-side converter is then set in order to develop a pre-charge voltage phase angle at a converter-side terminal of the converter contactor which is in phase with the phase angle of the grid voltage. A portion of the charge of the DC link is then discharged through the line-side converter to develop a pre-charge voltage at the converter-side terminal. Once the in-phase, pre-charge voltage is established at the converter-side terminal, the converter contactor is closed to re-couple the line-side converter to the power grid.
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公开(公告)号：EP3961886A1
公开(公告)日：2022-03-02
申请号：EP21192354.5
申请日：2021-08-20
发明人： Shaqqo, Bacil , Ramirez Sanchez, Fernando Arturo , Michener, Nathaniel Robert , Sutherland, Steven Wade
摘要： A method for operating a multi-level bridge power converter of an electrical power system connected to a power grid includes receiving, via a controller of the power converter, an indication of a transient event occurring in the power grid or the electrical power system. The power converter has a plurality of switching devices arranged in an active neutral point clamped topology. Accordingly, upon receiving the indication, the method includes activating a crowbar algorithm programmed in the controller of the power converter to bifurcate a current received by the power converter into a plurality of different current paths defined by the plurality of switching devices.
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5.发明公开
公开(公告)号：EP4170888A1
公开(公告)日：2023-04-26
申请号：EP22200012.7
申请日：2022-10-06
摘要： A method for operating a multi-level bridge power converter of an electrical power system connected to a power grid includes providing a plurality of switching devices of the power converter in one of a neutral point clamped topology or an active neutral point clamped topology, the plurality of switching devices including a first group and a second group of switching devices. The method also includes providing a multi-state deadtime for the first and second groups of switching devices that changes based on different state transitions of the power converter. Further, the method includes operating the first and second groups of switching devices according to the multi-state deadtime to allow the first group to switch differently than the second group during the different state transitions, thereby decreasing voltage overshoots on the first group during one or more of the different state transitions and providing safe transition between commutation states of the power converter.
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公开(公告)号：EP4050208A1
公开(公告)日：2022-08-31
申请号：EP22153449.8
申请日：2022-01-26
发明人： Ramirez Sanchez, Fernando Arturo , Berroteran, Igor , Holliday III, Cornelius Edward , Wilmer, David Scott
摘要： A system and method are provided for controlling low-speed operations of a wind turbine electrically coupled to an electrical grid. The wind turbine includes a generator and a power converter. The generator includes a generator rotor and a generator stator. An operating parameter of the generator rotor is indicative of a low-speed operation of the generator. Accordingly, the crossing of a first threshold by the operating parameter is detected. In response, at least a portion of a required reactive power generation is developed via the generator rotor. The portion is then delivered to the electrical grid via the grid side of the power converter.
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公开(公告)号：EP3840212A1
公开(公告)日：2021-06-23
申请号：EP20215038.9
申请日：2020-12-17
IPC分类号： H02P9/00
摘要： A method for operating a multi-level bridge power converter of an electrical power system includes connecting a plurality of phases of the power converter to a common terminal at a DC side of the power converter so as to effectively equate the plurality of phases at a common electrical potential. The method may also include monitoring, via a controller, a plurality of devices of the power converter for faults. Upon detection of a fault in one or more of the plurality of devices, the method includes activating, via the controller, one or more protection devices of a crowbar of the power converter to prevent additional faults from occurring in remaining devices of the plurality of devices by diverting energy away from the remaining devices of the plurality of devices.
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8.发明公开
公开(公告)号：EP4057494A1
公开(公告)日：2022-09-14
申请号：EP22156567.4
申请日：2022-02-14
摘要： A method for operating a multi-level bridge power converter of an electrical power system connected to a power grid includes providing a plurality of switching devices of the power converter in an active neutral point clamped topology. The method also includes operating the plurality of switching devices in a plurality of operating states such that current simultaneously flows through at least two parallel recovery paths of the plurality of switching devices during operation of the power converter to minimize a commutation path of the current when at least one diode of the plurality of switching devices recovers, thereby reducing parasitic inductance affecting the recovering antiparallel diode or the switch.
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9.发明公开
公开(公告)号：EP3913217A1
公开(公告)日：2021-11-24
申请号：EP21174765.4
申请日：2021-05-19
发明人： Holliday, Cornelius Edward , Angel, Mathew Doyle , Wagoner, Robert Gregory , Killeen, Nathan Michael , Hardwicke, Edward Wayne , Sutherland, Steven Wade , Ganireddy, Govardhan , Ramirez Sanchez, Fernando Arturo , Haque, Talha Irfanul
IPC分类号： F03D7/04
摘要： A system and method are provided for controlling a wind turbine to protect the wind turbine from anomalous operations. Accordingly, in response to receiving data indicative of an anomalous operational event of the wind turbine, the controller initiates an enhanced braking mode for the wind turbine. The enhanced braking mode is characterized by operating the generator at a torque setpoint that generates maximum available torque for a given set of operating conditions. Additionally, the torque setpoint is in excess of a nominal torque limit for the generator.
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10.发明公开
公开(公告)号：EP3855015A1
公开(公告)日：2021-07-28
申请号：EP21151044.1
申请日：2021-01-12
IPC分类号： F03D7/02
摘要： A system and method are provided for applying a pitch motor braking torque to a rotor blade. Accordingly, of the pitch control system from a 1 st operational mode to an emergency operational mode is initiated. The pitch motor of the pitch control system having an absence of supply current during the transition. A short-circuit is established across the Armature of the pitch motor so as to establish a current flow. The current is generated by the pitch motor in response to rotation of the rotor blade about the pitch axis when the pitch motor has the absence of supply current. In response to the current flow being generated, generating a braking torque in a single direction with the pitch motor so as to allow the rotor blade to move freely to a lesser loaded orientation relative to an original orientation to protect the wind turbine from damage.
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