Patents by Inventor Micheal Schwenke

Micheal Schwenke 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).

  • Method of deriving a signal indicating an oscillation in an electric power supply system
    Patent number: 6104182
    Abstract: Current and voltage space vectors of the positive sequence system are formed from phase current and phase voltage sampling values of an electric power supply system, and power quantities of the positive sequence system are derived from them. System frequency components are eliminated from these power quantities by a least squares estimate, thus forming a measured active power quantity of the positive sequence system and a measured reactive power quantity of the positive sequence system. By forming quotients with a measured current quantity of the positive sequence system, also obtained using the least squares estimate, impedance values of the positive sequence system are also obtained. These are tested for monotony and abrupt changes and a suspected oscillation signal is formed, if applicable.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: August 15, 2000
    Assignee: Siemens AG
    Inventors: Andreas Jurisch, Micheal Schwenke