Patents by Inventor David Lubkeman

David Lubkeman 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).

  • Patent number: 6760670
    Abstract: The invention describes a method, system, device, and computer-readable medium having computer-executable instructions for classifying faults on an electrical power line. In particular, the invention permits the classification of crossover faults using a local measurement technique. The inventive method includes providing a first electrical power transmission line and a second electrical power transmission line, and monitoring the first electrical power transmission line to identify a crossover fault occurring between the first and the second electrical power transmission lines.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: July 6, 2004
    Assignee: ABB Power Automation Ltd.
    Inventors: James D. Stoupis, David Lubkeman, Reto Buettner, David G. Hart
  • Patent number: 6741943
    Abstract: The invention describes a method, system, device, and computer-readable medium having computer-executable instructions for classifying faults on an electrical power line. In particular, the invention permits the classification of crossover faults, using a local measurement technique. The inventive method includes providing a first electrical power transmission line and a second electrical power transmission line, and monitoring the first electrical power transmission line to identify a crossover fault occurring between the first and the second electrical power transmission lines.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: May 25, 2004
    Assignee: ABB Power Automation Ltd.
    Inventors: James D. Stoupis, David Lubkeman, Reto Buettner, David G. Hart
  • Patent number: 6738719
    Abstract: The invention describes a method, system, device, and computer-readable medium having computer-executable instructions for classifying faults on an electrical power line. In particular, the invention permits the classification of crossover faults, using a local measurement technique. The inventive method includes providing a first electrical power transmission line and a second electrical power transmission line, and monitoring the first electrical power transmission line to identify a crossover fault occurring between the first and the second electrical power transmission lines.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: May 18, 2004
    Assignee: ABB Power Automation Ltd.
    Inventors: James D. Stoupis, David Lubkeman, Reto Buettner, David G. Hart
  • Patent number: 6721670
    Abstract: The invention describes a method, system, device, and computer-readable medium having computer-executable instructions for classifying faults on an electrical power line. In particular, the invention permits the classification of crossover faults using a local measurement technique. The inventive method includes providing a first electrical power transmission line and a second electrical power transmission line, and monitoring the first electrical power transmission line to identify a crossover fault occurring between the first and the second electrical power transmission lines.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: April 13, 2004
    Assignee: ABB Power Automation Ltd.
    Inventors: James D. Stoupis, David Lubkeman, Reto Buettner, David G. Hart
  • Publication number: 20030085715
    Abstract: A fault is located in a power distribution system having a line frequency. The power distribution system includes a plurality of phases, at least one feeder, and each feeder includes at least one segment. The fault is located by detecting a faulted phase from the plurality of phases of the power distribution system. A measurement signal having a measurement frequency is injected into the detected faulted phase, the measurement frequency being a different frequency than the line frequency. The fault location is determined for a selected segment based on at least one measured residual current corresponding to the injected signal and a predetermined relative impedance of the power distribution system.
    Type: Application
    Filed: August 15, 2001
    Publication date: May 8, 2003
    Inventors: David Lubkeman, Michael J. Gorman, David G. Hart
  • Publication number: 20030086222
    Abstract: The invention describes a method, system, device, and computer-readable medium having computer-executable instructions for classifying faults on an electrical power line. In particular, the invention permits the classification of crossover faults using a local measurement technique. The inventive method includes providing a first electrical power transmission line and a second electrical power transmission line, and monitoring the first electrical power transmission line to identify a crossover fault occurring between the first and the second electrical power transmission lines.
    Type: Application
    Filed: September 13, 2001
    Publication date: May 8, 2003
    Inventors: James D. Stoupis, David Lubkeman, Reto Buettner, David G. Hart
  • Publication number: 20030081364
    Abstract: The invention describes a method, system, device, and computer-readable medium having computer-executable instructions for classifying faults on an electrical power line. In particular, the invention permits the classification of crossover faults, using a local measurement technique. The inventive method includes providing a first electrical power transmission line and a second electrical power transmission line, and monitoring the first electrical power transmission line to identify a crossover fault occurring between the first and the second electrical power transmission lines.
    Type: Application
    Filed: September 13, 2001
    Publication date: May 1, 2003
    Inventors: James D. Stoupis, David Lubkeman, Reto Buettner, David G. Hart
  • Publication number: 20030074146
    Abstract: The invention describes a method, system, device, and computer-readable medium having computer-executable instructions for classifying faults on an electrical power line. In particular, the invention permits the classification of crossover faults using a local measurement technique. The inventive method includes providing a first electrical power transmission line and a second electrical power transmission line, and monitoring the first electrical power transmission line to identify a crossover fault occurring between the first and the second electrical power transmission lines.
    Type: Application
    Filed: September 13, 2001
    Publication date: April 17, 2003
    Inventors: James D. Stoupis, David Lubkeman, Reto Buettner, David G. Hart
  • Publication number: 20030060991
    Abstract: The invention describes a method, system, device, and computer-readable medium having computer-executable instructions for classifying faults on an electrical power line. In particular, the invention permits the classification of crossover faults using a local measurement technique. The inventive method includes providing a first electrical power transmission line and a second electrical power transmission line, and monitoring the first electrical power transmission line to identify a crossover fault occurring between the first and the second electrical power transmission lines.
    Type: Application
    Filed: September 13, 2001
    Publication date: March 27, 2003
    Inventors: James D. Stoupis, David Lubkeman, Reto Buettner, David G. Hart
  • Publication number: 20030055585
    Abstract: The invention describes a method, system, device, and computer-readable medium having computer-executable instructions for classifying faults on an electrical power line. In particular, the invention permits the classification of crossover faults, using a local measurement technique. The inventive method includes providing a first electrical power transmission line and a second electrical power transmission line, and monitoring the first electrical power transmission line to identify a crossover fault occurring between the first and the second electrical power transmission lines.
    Type: Application
    Filed: September 13, 2001
    Publication date: March 20, 2003
    Inventors: James D. Stoupis, David Lubkeman, Reto Buettner, David G. Hart
  • Publication number: 20020149375
    Abstract: A fault is located in a transmission line with a sending end, a receiving end, and a plurality of tapped nodes, and multiple tapped loads connected to the transmission line at tap nodes. The sending end and the receiving end each include a measuring device. The fault location is determined by obtaining measured circuit parameters including measured pre-fault and faulted current and voltage values at the sending end and at the receiving end of the transmission line. An equivalent tap node location is calculated using measured pre-fault and faulted current and voltage values at the sending end and at the receiving end of the transmission line. The equivalent tap node divides the transmission line into a sending side and a receiving side. The phase angle difference due to unsynchronized measurement using the measured pre-fault current and the measured pre-fault voltage values may be calculated. The equivalent load impedance of the tapped loads is calculated.
    Type: Application
    Filed: December 29, 2000
    Publication date: October 17, 2002
    Inventors: Yi Hu, David Lubkeman, Reto Buettner, David Hart
  • Patent number: 6466031
    Abstract: A fault is located in a transmission line with a sending end, a receiving end, and a plurality of tapped nodes, and multiple tapped loads connected to the transmission line at tap nodes. The sending end and the receiving end each include a measuring device. The fault location is determined by obtaining measured circuit parameters including measured pre-fault and faulted current and voltage values at the sending end and at the receiving end of the transmission line. An equivalent tap node location is calculated using measured pre-fault and faulted current and voltage values at the sending end and at the receiving end of the transmission line. The equivalent tap node divides the transmission line into a sending side and a receiving side. The phase angle difference due to unsynchronized measurement using the measured pre-fault current and the measured pre-fault voltage values may be calculated. The equivalent load impedance of the tapped loads is calculated.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: October 15, 2002
    Assignee: ABB Power Automation Ltd.
    Inventors: Yi Hu, David Lubkeman, Reto Buettner, David Hart
  • Patent number: 6466030
    Abstract: A fault is located in a transmission line with a sending end, a receiving end, and a tapped load connected to the transmission line at a tap node. The tap node divides the transmission line into a sending side and a receiving side. The sending end and the receiving end each include a measuring device. The fault location is determined by obtaining measured circuit parameters including measured pre-fault and faulted current and voltage values at the sending end and at the receiving end of the transmission line. The phase angle difference due to unsynchronized measurement using the measured pre-fault current and the measured pre-fault voltage values may be calculated. The load impedance of the tapped load is calculated. A first fault location is calculated assuming that the fault is located on the sending side of the tap node. A second fault location is calculated assuming that the fault is located on the receiving side of the tap node.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: October 15, 2002
    Assignee: ABB Power Automation Ltd.
    Inventors: Yi Hu, David Lubkeman, Reto Buettner, David Hart
  • Publication number: 20020121903
    Abstract: A fault is located in a transmission line with a sending end, a receiving end, and a tapped load connected to the transmission line at a tap node. The tap node divides the transmission line into a sending side and a receiving side. The sending end and the receiving end each include a measuring device. The fault location is determined by obtaining measured circuit parameters including measured pre-fault and faulted current and voltage values at the sending end and at the receiving end of the transmission line. The phase angle difference due to unsynchronized measurement using the measured pre-fault current and the measured pre-fault voltage values may be calculated. The load impedance of the tapped load is calculated. A first fault location is calculated assuming that the fault is located on the sending side of the tap node. A second fault location is calculated assuming that the fault is located on the receiving side of the tap node.
    Type: Application
    Filed: December 29, 2000
    Publication date: September 5, 2002
    Inventors: Yi Hu, David Lubkeman, Reto Buettner, David Hart