Patents by Inventor JOEL C. MATHEWSON

JOEL C. MATHEWSON 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).

  • Apparatus and method for generating a metering voltage output for a voltage regulator using a microprocessor
    Patent number: 8519681
    Abstract: A voltage regulator (10) for regulating a power distribution system voltage during forward or reverse power flow. The voltage regulator (10) accommodates multiple configurations of a tertiary winding (30) and a potential transformer (36) connected across source-side bushings (S/SL) or load-side bushings (L/SL). The invention simulates operation of a potential transformer (36), and the output voltage therefrom, connected across the source-side (S/SL) or load-side bushings (L/SL). The invention also produces a corrected voltage compensating a non-standard turns ratio of the tertiary winding (30). The regulator (10) controls a tap changer (18) to regulate the system voltage according to a digital value representing the voltage across the source-side (S/SL) or load-side bushings (L/SL), comprising a measured voltage, the corrected voltage or the simulated voltage.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: August 27, 2013
    Assignee: Siemens Energy, Inc.
    Inventor: Joel C. Mathewson
  • APPARATUS AND METHOD FOR GENERATING A METERING VOLTAGE OUTPUT FOR A VOLTAGE REGULATOR USING A MICROPROCESSOR
    Publication number: 20120206115
    Abstract: A voltage regulator (10) for regulating a power distribution system voltage during forward or reverse power flow. The voltage regulator (10) accommodates multiple configurations of a tertiary winding (30) and a potential transformer (36) connected across source-side bushings (S/SL) or load-side bushings (L/SL). The invention simulates operation of a potential transformer (36), and the output voltage therefrom, connected across the source-side (S/SL) or load-side bushings (L/SL). The invention also produces a corrected voltage compensating a non-standard turns ratio of the tertiary winding (30). The regulator (10) controls a tap changer (18) to regulate the system voltage according to a digital value representing the voltage across the source-side (S/SL) or load-side bushings (L/SL), comprising a measured voltage, the corrected voltage or the simulated voltage.
    Type: Application
    Filed: February 11, 2011
    Publication date: August 16, 2012
    Inventor: JOEL C. MATHEWSON