Patents by Inventor Alan R. Grightmire

Alan R. Grightmire 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).

  • Real-time power-line sag monitoring using time-synchronized power system measurements
    Patent number: 7620517
    Abstract: A sag calculator (112) computes sag for a span of a line section based at least in part upon an average temperature of the conductors in the line section. A temperature calculator (110) determines the temperature by ascertaining an ohmic resistance of the conductor lines based at least in part upon time-synchronized power system voltage and current measurements such as (but not limited to) phasor measurements generated by phasor measurement units (104, 106). The temperature calculator (110) determines the temperature as a function of the ohmic resistance.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: November 17, 2009
    Assignee: ABB Research Ltd.
    Inventors: Ernst Scholtz, Reynaldo F. Nuqui, Danny Julian, Alan R. Grightmire
  • REAL-TIME POWER-LINE SAG MONITORING USING TIME-SYNCHRONIZED POWER SYSTEM MEASUREMENTS
    Publication number: 20080189061
    Abstract: A sag calculator (112) computes sag for a span of a line section based at least in part upon an average temperature of the conductors in the line section. A temperature calculator (110) determines the temperature by ascertaining an ohmic resistance of the conductor lines based at least in part upon time-synchronized power system voltage and current measurements such as (but not limited to) phasor measurements generated by phasor measurement units (104, 106). The temperature calculator (110) determines the temperature as a function of the ohmic resistance.
    Type: Application
    Filed: February 5, 2007
    Publication date: August 7, 2008
    Applicant: ABB RESEARCH LTD.
    Inventors: Ernst Scholtz, Reynaldo F. Nuqui, Danny Julian, Alan R. Grightmire