Patents by Inventor Einar Larsen
Einar Larsen 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: 9917463Abstract: There are provided methods, devices, and systems relating to discharging thyristor-switched capacitors. For example, there is provided a method for discharging the capacitors of a thyristor-switched capacitor (TSC) device coupled to a transmission line. The method can include determining whether an angle of a voltage on the transmission line is within one of a first threshold range and a second threshold range. Further, the method can include discharging the capacitors, when the angle is within the first threshold range, by operating the TSC device in a first discharging mode. Furthermore, the method can include discharging the capacitors, when the angle is within the second threshold range, by operating the TSC device in a second discharging mode distinct from the first discharging mode.Type: GrantFiled: September 25, 2015Date of Patent: March 13, 2018Assignee: General Electric CompanyInventors: Wei Ren, Einar Larsen
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Patent number: 9871394Abstract: There are provided methods, devices, and systems relating to discharging thyristor-switched capacitors. For example, there is provided a method for discharging the capacitors of a thyristor-switched capacitor (TSC) device coupled to a transmission line. The method includes determining whether an angle of a voltage on the transmission line is within a threshold angle. Further, the method can include operating the device in a discharging mode when the angle is within the threshold angle and the threshold angle is in a predetermined set of threshold angles.Type: GrantFiled: October 6, 2015Date of Patent: January 16, 2018Assignee: General Electric CompanyInventors: Wei Ren, Einar Larsen
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Patent number: 9853475Abstract: There are provided methods, devices, and systems relating to discharging thyristor-switched capacitors. For example, there is provided a method for discharging a first capacitor, a second capacitor, and a third capacitor. Each of the capacitors is coupled to respective phases of a transmission line. The first capacitor and the third capacitor are each coupled to their respective phase of the transmission line via a pair of anti-parallel thyristors, and the second capacitor is coupled directly to another phase of the transmission line with no thyristors therebetween. The method can include determining whether an angle of a voltage on the transmission line is within a threshold angle. Further, the method can include discharging the first, second, and third capacitors when the angle is within a threshold angle and the threshold angle is any value from a predetermined set of threshold angles.Type: GrantFiled: October 6, 2015Date of Patent: December 26, 2017Assignee: General Electric CompanyInventors: Wei Ren, Einar Larsen
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Publication number: 20170093178Abstract: There are provided methods, devices, and systems relating to discharging thyristor-switched capacitors. For example, there is provided a method for discharging the capacitors of a thyristor-switched capacitor (TSC) device coupled to a transmission line. The method includes determining whether an angle of a voltage on the transmission line is within a threshold angle. Further, the method can include operating the device in a discharging mode when the angle is within the threshold angle and the threshold angle is in a predetermined set of threshold angles.Type: ApplicationFiled: October 6, 2015Publication date: March 30, 2017Inventors: Wei Ren, Einar Larsen
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Publication number: 20170093177Abstract: There are provided methods, devices, and systems relating to discharging thyristor-switched capacitors. For example, there is provided a method for discharging the capacitors of a thyristor-switched capacitor (TSC) device coupled to a transmission line. The method can include determining whether an angle of a voltage on the transmission line is within one of a first threshold range and a second threshold range. Further, the method can include discharging the capacitors, when the angle is within the first threshold range, by operating the TSC device in a first discharging mode. Furthermore, the method can include discharging the capacitors, when the angle is within the second threshold range, by operating the TSC device in a second discharging mode distinct from the first discharging mode.Type: ApplicationFiled: September 25, 2015Publication date: March 30, 2017Inventors: Wei Ren, Einar Larsen
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Publication number: 20170093192Abstract: There are provided methods, devices, and systems relating to discharging thyristor-switched capacitors. For example, there is provided a method for discharging a first capacitor, a second capacitor, and a third capacitor. Each of the capacitors is coupled to respective phases of a transmission line. The first capacitor and the third capacitor are each coupled to their respective phase of the transmission line via a pair of anti-parallel thyristors, and the second capacitor is coupled directly to another phase of the transmission line with no thyristors therebetween. The method can include determining whether an angle of a voltage on the transmission line is within a threshold angle. Further, the method can include discharging the first, second, and third capacitors when the angle is within a threshold angle and the threshold angle is any value from a predetermined set of threshold angles.Type: ApplicationFiled: October 6, 2015Publication date: March 30, 2017Inventors: Wei Ren, Einar Larsen
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Patent number: 7629705Abstract: A method for operating an electrical machine includes coupling the electrical machine to an electric power system such that the electric power system is configured to transmit at least one phase of electric power to and from the electrical machine. The method also includes configuring the electrical machine such that the electrical machine remains electrically connected to the electric power system during and subsequent to a voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time.Type: GrantFiled: October 20, 2006Date of Patent: December 8, 2009Assignee: General Electric CompanyInventors: Sidney A. Barker, Anthony Klodowski, John D'Atre, Einar Larsen, Goran Drobnjak
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Patent number: 7417333Abstract: A method for determining electric currents for an electrical machine includes generating a first real power current demand signal and a first reactive power current demand signal. The method also includes determining at least one of a second real power current demand signal and a second reactive power current demand signal by prioritizing a second real power current demand signal over a second reactive power current demand signal. Alternatively, the method also includes determining at least one of a second real power current demand signal and a second reactive power current demand signal by prioritizing the second reactive power current demand signal over the second real power current demand signal. The method further includes comparing at least one of the first real power current demand signal and first reactive power current demand signal to at least one electrical machine current limit signal.Type: GrantFiled: November 2, 2006Date of Patent: August 26, 2008Assignee: General Electric CompanyInventors: Nicholas Wright Miller, Einar Larsen, Robert William Delmerico
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Publication number: 20080106098Abstract: A method for determining electric currents for an electrical machine includes generating a first real power current demand signal and a first reactive power current demand signal. The method also includes determining at least one of a second real power current demand signal and a second reactive power current demand signal by prioritizing a second real power current demand signal over a second reactive power current demand signal. Alternatively, the method also includes determining at least one of a second real power current demand signal and a second reactive power current demand signal by prioritizing the second reactive power current demand signal over the second real power current demand signal. The method further includes comparing at least one of the first real power current demand signal and first reactive power current demand signal to at least one electrical machine current limit signal.Type: ApplicationFiled: November 2, 2006Publication date: May 8, 2008Inventors: Nicholas Wright Miller, Einar Larsen, Robert William Delmerico
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Publication number: 20080093853Abstract: A method for operating an electrical machine includes coupling the electrical machine to an electric power system such that the electric power system is configured to transmit at least one phase of electric power to and from the electrical machine. The method also includes configuring the electrical machine such that the electrical machine remains electrically connected to the electric power system during and subsequent to a voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time.Type: ApplicationFiled: October 20, 2006Publication date: April 24, 2008Inventors: Sidney A. Barker, Anthony Klodowski, John D'Atre, Einar Larsen, Goran Drobnjak
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Publication number: 20060255594Abstract: A wind turbine generator control system includes relatively fast regulation of voltage near the individual generators with relatively slower overall reactive power regulation at a substation or wind farm level. The setpoint of the relatively fast voltage regulator is adjusted by the relatively slow reactive power regulator. The fast voltage regulation can be at the generator terminals or at a synthesized remote point.Type: ApplicationFiled: July 10, 2006Publication date: November 16, 2006Inventor: Einar Larsen
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Publication number: 20060170219Abstract: A method of controlling a compressor turbine motor train including: receiving a control signal from a plant process controller; receiving a feedback signal indicative of a state of the electrical grid and adjusting an operational parameter of the compressor turbine motor train to stabilize at least one of a frequency and a voltage of the electrical grid.Type: ApplicationFiled: January 28, 2005Publication date: August 3, 2006Applicant: GENERAL ELECTRIC COMPANYInventor: Einar Larsen
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Publication number: 20060012181Abstract: A wind turbine generator control system includes relatively fast regulation of voltage near the individual generators with relatively slower overall reactive power regulation at a substation or wind farm level. The setpoint of the relatively fast voltage regulator is adjusted by the relatively slow reactive power regulator. The fast voltage regulation can be at the generator terminals or at a synthesized remote point.Type: ApplicationFiled: September 19, 2005Publication date: January 19, 2006Inventor: Einar Larsen
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Publication number: 20050046196Abstract: A wind turbine generator control system includes relatively fast regulation of voltage near the individual generators with relatively slower overall reactive power regulation at a substation or wind farm level. The setpoint of the relatively fast voltage regulator is adjusted by the relatively slow reactive power regulator. The fast voltage regulation can be at the generator terminals or at a synthesized remote point.Type: ApplicationFiled: September 3, 2003Publication date: March 3, 2005Inventor: Einar Larsen
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Patent number: 5914540Abstract: A neutral conductor filter having three transformers. A first transformer has a primary winding connected to a first power conductor and the neutral conductor. A second transformer has a primary winding connected to a second power conductor and the neutral conductor. A third transformer has a primary winding connected to a third power conductor and the neutral conductor. The secondary windings of the transformers are connected in series with each other and a capacitor is connected in parallel with the series connected secondary windings. The capacitor is tuned with the leakage reactance of the transformers so that the impedance to zero-sequence third harmonic current is minimized.Type: GrantFiled: May 29, 1997Date of Patent: June 22, 1999Assignee: General Electric CompanyInventor: Einar Larsen
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Patent number: 5910889Abstract: A hybrid active power filter having programmed impedance characteristics is presented. In accordance with which, a passive device comprising a capacitor C.sub.F is connected in series with an active device which are together connected in shunt with a power source and a load at transmission lines of a power system. Capacitor C.sub.F substantially supports the full-line voltage V.sub.H of the power source, whereby the active filter is exposed to a substantially lower voltage than the line voltage V.sub.H. The active device includes on active filter, i.e., an inverter current regulator with a programmable controller for executing a control algorithm. The controller of the active device receives signals corresponding to a voltage V.sub.M, at the low side of filter capacitor C.sub.F. Voltage V.sub.M is at a substantially lower voltage than the line voltage V.sub.H, whereby the cost of sensing voltage V.sub.M is significantly less than sensing the high line voltage V.sub..Type: GrantFiled: May 29, 1997Date of Patent: June 8, 1999Assignee: General Electric CompanyInventors: Einar Larsen, Robert Delmerico