Patents by Inventor Henning Luetze
Henning Luetze has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9020650Abstract: A utility grid is provided, the utility grid including a centralized controller; an intermittent renewable energy source for generating electrical power; at least one further power generation system; and a local controller for controlling the total power output of the intermittent renewable energy source and the at least one further power generation system, wherein the centralized controller is connected with the local controller and adapted to request a desired total power output from the local controller.Type: GrantFiled: February 13, 2007Date of Patent: April 28, 2015Assignee: General Electric CompanyInventors: Hans Henning Lütze, Andreas Bücker
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Patent number: 8779610Abstract: The invention relates to a wind energy system having a support (5), a rotor (6) that is rotatably supported on the support (5) about a rotor axis (7), said rotor having multiple rotor blades (9, 10) and being driven or drivable by means of wind energy (15), an electric generator (16) that is coupled to the rotor (6), said generator being drivable or driven by the rotor (6), a first converter (23) that is electrically coupled to the generator (16), said converter being coupled or capable of being coupled to an electric distribution network (27), at least one electric or partially electric auxiliary system (20), wherein the at least one auxiliary system (20) is or can be electrically coupled to the generator (16) while interconnecting a second converter (33).Type: GrantFiled: September 1, 2009Date of Patent: July 15, 2014Inventor: Henning Luetze
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Publication number: 20120068461Abstract: The invention relates to a wind energy system having a support (5), a rotor (6) that is rotatably supported on the support (5) about a rotor axis (7), said rotor having multiple rotor blades (9, 10) and being driven or drivable by means of wind energy (15), an electric generator (16) that is coupled to the rotor (6), said generator being drivable or driven by the rotor (6), a first converter (23) that is electrically coupled to the generator (16), said converter being coupled or capable of being coupled to an electric distribution network (27), at least one electric or partially electric auxiliary system (20), wherein the at least one auxiliary system (20) is or can be electrically coupled to the generator (16) while interconnecting a second converter (33).Type: ApplicationFiled: September 1, 2009Publication date: March 22, 2012Inventor: Henning Luetze
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Patent number: 8029239Abstract: A rotor for a wind energy turbine includes a hub defining an inner space and at least one rotor blade defining an inner space and having a tip and a root attached to the hub. The inner spaces of the hub and the at least one rotor blade are in fluid communication. The rotor further includes air flow means for causing air to flow out of the hub and into the at least one rotor blade.Type: GrantFiled: November 18, 2005Date of Patent: October 4, 2011Assignee: General Electric CompanyInventor: Henning Luetze
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Patent number: 7656135Abstract: A wind turbine generator includes at least one rotating member, at least one stationary member, and a clearance gap control system. The stationary member is positioned such that a clearance gap is defined between a portion of the rotating member and a portion of the stationary member. The clearance gap is configured to facilitate transmitting a controllable magnetic flux therethrough. The control system includes at least one clearance gap measurement assembly, at least one power converter, and at least one controller. The controller is coupled in electronic data communication with the assembly and the converter and is configured to modulate a dimension of the gap by modulating the flux.Type: GrantFiled: January 5, 2007Date of Patent: February 2, 2010Assignee: General Electric CompanyInventors: Christian Schram, Henning Luetze, Andreas Buecker, Andre Riesberg, Robert William Delmerico
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Patent number: 7471007Abstract: The invention relates to Method of operating a wind turbine, wherein rotor windings of an induction generator, which comprises stator coils coupled to a voltage grid, fed with rotor currents by a feed-in unit are driven by a rotor of the wind turbine; wherein the frequencies of the fed-in rotor currents are controlled depending on the rotor rotation frequency and the feed-in unit is electrically decoupled from the rotor windings in the case predetermined variations of the grid voltage amplitude and the rotor current feed-in is resumed after the decoupling caused by the variation of the grid voltage amplitude, when the currents generated in the rotor windings by the variation have declined to a predetermined value.Type: GrantFiled: December 12, 2007Date of Patent: December 30, 2008Assignee: General Electric CompanyInventors: Andreas Bücker, Wilhelm Janssen, Henning Lütze
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Publication number: 20080164697Abstract: A wind turbine generator includes at least one rotating member, at least one stationary member, and a clearance gap control system. The stationary member is positioned such that a clearance gap is defined between a portion of the rotating member and a portion of the stationary member. The clearance gap is configured to facilitate transmitting a controllable magnetic flux therethrough. The control system includes at least one clearance gap measurement assembly, at least one power converter, and at least one controller. The controller is coupled in electronic data communication with the assembly and the converter and is configured to modulate a dimension of the gap by modulating the flux.Type: ApplicationFiled: January 5, 2007Publication date: July 10, 2008Inventors: Christian Schram, Henning Luetze, Andreas Buecker, Andre Riesberg, Robert William Delmerico
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Patent number: 7363808Abstract: A technique for correcting measurement error in data produced by a nacelle-based anemometer and for determining free stream wind speed for a wind turbine involves ascertaining parameters related to the wind turbine and the operation thereof, and using the parameters and data from the nacelle based anemometer as inputs to an algorithm to provide for determination of corrected wind speed data.Type: GrantFiled: December 5, 2005Date of Patent: April 29, 2008Assignee: General Electric CompanyInventors: Frank T. Ormel, Alexander Donth, Thomas Siebers, Clement Faucherre, Henning Luetze
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Patent number: 7321221Abstract: A method of operating a wind turbine, wherein the wind turbine may include rotor windings of an induction generator, which includes stator coils coupled to a voltage grid, fed with rotor currents by a feed-in unit are driven by a rotor of the wind turbine; wherein the frequencies of the fed-in rotor currents are controlled depending on the rotor rotation frequency and the feed-in unit is electrically decoupled from the rotor windings in the case predetermined variations of the grid voltage amplitude and the rotor current feed-in is resumed after the decoupling caused by the variation of the grid voltage amplitude, when the currents generated in the motor windings by the variation have declined to a predetermined value.Type: GrantFiled: July 17, 2003Date of Patent: January 22, 2008Assignee: General Electric CompanyInventors: Andreas Bücker, Wilhelm Janssen, Henning Lütze
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Patent number: 7276807Abstract: A wind turbine braking system including: a wind turbine including turbine blades and a control system; a generator coupled to the turbine blades; a generator converter coupled to the generator and connectable to a utility power grid; at least one dump resistor coupled to the generator and generator converter, and if the utility power grid losses power, the dump resistor applying an electrical load to the generator converter.Type: GrantFiled: January 19, 2006Date of Patent: October 2, 2007Assignee: General Electric CompanyInventors: Henning Luetze, Thomas Edenfeld, Peter Gauchel
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Publication number: 20070164567Abstract: A wind turbine braking system including: a wind turbine including turbine blades and a control system; a generator coupled to the turbine blades; a generator converter coupled to the generator and connectable to a utility power grid; at least one dump resistor coupled to the generator and generator converter, and if the utility power grid losses power, the dump resistor applying an electrical load to the generator converter.Type: ApplicationFiled: January 19, 2006Publication date: July 19, 2007Applicant: General Electric CompanyInventors: Henning Luetze, Thomas Edenfeld, Peter Gauchel
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Patent number: 7239036Abstract: A system and method for power control in wind turbines are provided. The method includes switching a plurality of switching devices in a power conversion component of the wind turbine system in a normal switching mode to provide power flow through the power conversion component. The method further includes switching the plurality of switches devices in the power conversion component of the wind turbine system in a short circuit switching mode to prevent power flow through the power conversion component.Type: GrantFiled: July 29, 2005Date of Patent: July 3, 2007Assignee: General Electric CompanyInventors: John Douglas D'Atre, Anthony Michael Klodowski, Allen Michael Ritter, David Smith, Robert Gregory Wagoner, Luis Jose Garces, Henning Luetze
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Publication number: 20070125165Abstract: A technique for correcting measurement error in data produced by a nacelle-based anemometer and for determining free stream wind speed for a wind turbine involves ascertaining parameters related to the wind turbine and the operation thereof, and using the parameters and data from the nacelle based anemometer as inputs to an algorithm to provide for determination of corrected wind speed data.Type: ApplicationFiled: December 5, 2005Publication date: June 7, 2007Inventors: Frank Ormel, Alexander Donth, Thomas Siebers, Clement Faucherre, Henning Luetze
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Publication number: 20070116567Abstract: A rotor for a wind energy turbine includes a hub defining an inner space and at least one rotor blade defining an inner space and having a tip and a root attached to the hub. The inner spaces of the hub and the at least one rotor blade are in fluid communication. The rotor further includes air flow means for causing air to flow out of the hub and into the at least one rotor blade.Type: ApplicationFiled: November 18, 2005Publication date: May 24, 2007Inventor: Henning Luetze
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Publication number: 20070024059Abstract: A system and method for power control in wind turbines are provided. The method includes switching a plurality of switching devices in a power conversion component of the wind turbine system in a normal switching mode to provide power flow through the power conversion component. The method further includes switching the plurality of switches devices in the power conversion component of the wind turbine system in a short circuit switching mode to prevent power flow through the power conversion component.Type: ApplicationFiled: July 29, 2005Publication date: February 1, 2007Inventors: John D'Atre, Anthony Klodowski, Allen Ritter, David Smith, Robert Wagoner, Luis Garces, Henning Luetze
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Patent number: 6921985Abstract: A wind turbine. The wind turbine includes a blade pitch control system to vary a pitch of one or more blades and a turbine controller coupled with the blade pitch control system. A first power source is coupled with the turbine controller and with the blade pitch control system to provide power during a first mode of operation. Uninterruptible power supplies coupled to the turbine controller and with the blade pitch control system to provide power during a second mode of operation. The turbine controller detects a transition from the first mode of operation to the second mode of operation and causes the blade pitch control system to vary the pitch of the one or more blades in response to the transition.Type: GrantFiled: January 24, 2003Date of Patent: July 26, 2005Assignee: General Electric CompanyInventors: Wilhelm Janssen, Henning Luetze, Andreas Buecker, Till Hoffmann, Ralf Hagedorn
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Patent number: 6783326Abstract: Two independent adjusting systems are recommended for each rotor blade (6) for blade angle adjustments of the rotor blades (6) of the rotor of a wind power plant, assuring full redundancy of the blade angle adjustment. By suitable control of the individual adjustment paths of the two adjustments systems, additional advantageous effects can be gained, such as good lubricant distribution and/or even load distribution over time (FIG. 1).Type: GrantFiled: August 20, 2002Date of Patent: August 31, 2004Assignee: General Electric CompanyInventors: Roland Weitkamp, Henning Lütze, André Riesberg, Jochen Anemüller
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Publication number: 20040145188Abstract: A wind turbine. The wind turbine includes a blade pitch control system to vary a pitch of one or more blades and a turbine controller coupled with the blade pitch control system. A first power source is coupled with the turbine controller and with the blade pitch control system to provide power during a first mode of operation. Uninterruptible power supplies coupled to the turbine controller and with the blade pitch control system to provide power during a second mode of operation. The turbine controller detects a transition from the first mode of operation to the second mode of operation and causes the blade pitch control system to vary the pitch of the one or more blades in response to the transition.Type: ApplicationFiled: January 24, 2003Publication date: July 29, 2004Inventors: Wilhelm Janssen, Henning Luetze, Andreas Buecker, Till Hoffmann, Ralf Hagedorn