Patents by Inventor Mika TAUSA

Mika TAUSA 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).

  • Differential protection in electrical power networks
    Patent number: 9106076
    Abstract: A method in a three-terminal differential protection includes measuring a terminal phase current (IT1(y), IT2(y), IT3(y)) at each terminal (T1, T2, T3) of a protected zone of the differential protection in each phase (L1, L2, L3) to be protected, and determining a bias current (Ib(y)) of the phase on the basis of the terminal phase currents (IT1(y), IT2(y), IT3(y)). The bias current determination includes subtracting phasor values of the terminal phase currents of two terminals from the phasor value of the terminal phase current of one terminal. The terminal phase current, which is a minuend in the phasor difference computation, is selected on the basis of the phase angles or amplitudes of the terminal phase currents.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: August 11, 2015
    Assignee: ABB TECHNOLOGY AG
    Inventors: Mika Tausa, Kari Vanhala
  • DIFFERENTIAL PROTECTION IN ELECTRICAL POWER NETWORKS
    Publication number: 20140002937
    Abstract: A method in a three-terminal differential protection includes measuring a terminal phase current (IT1(y), IT2(y), IT3(y)) at each terminal (T1, T2, T3) of a protected zone of the differential protection in each phase (L1, L2, L3) to be protected, and determining a bias current (Ib(y)) of the phase on the basis of the terminal phase currents (IT1(y), IT2(y), IT3(y)). The bias current determination includes subtracting phasor values of the terminal phase currents of two terminals from the phasor value of the terminal phase current of one terminal. The terminal phase current, which is a minuend in the phasor difference computation, is selected on the basis of the phase angles or amplitudes of the terminal phase currents.
    Type: Application
    Filed: June 27, 2013
    Publication date: January 2, 2014
    Inventors: Mika TAUSA, Kari VANHALA