Patents by Inventor Sören Forsman

Sören Forsman 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 and control device for current differential protection
    Patent number: 10243351
    Abstract: A method of current differential protection performed in a control device is disclosed, wherein the control device has a first operate-restrain characteristic with a differential characteristic pick-up setting ID. The method includes: determining currents of all terminals of a protected object; determining a differential current based on the determined currents; determining direct current, DC, components in the respective determined currents; detecting a fault; and adjusting, for a detected external fault, the operate-restrain characteristics by setting an adjusted differential characteristic pick-up setting ID_adj to be equal to the sum of the differential characteristic pick-up setting ID and the determined DC components, providing an adapted operate-restrain characteristics. Corresponding control device, computer program and computer program product are also disclosed.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: March 26, 2019
    Assignee: ABB Schweiz AG
    Inventors: Ivo Brncic, Zhanpeng Shi, Sören Forsman
  • Method And Control Device For Current Differential Protection
    Publication number: 20180358802
    Abstract: A method of current differential protection performed in a control device is disclosed, wherein the control device has a first operate-restrain characteristic with a differential characteristic pick-up setting ID. The method includes: determining currents of all terminals of a protected object; determining a differential current based on the determined currents; determining direct current, DC, components in the respective determined currents; detecting a fault; and adjusting, for a detected external fault, the operate-restrain characteristics by setting an adjusted differential characteristic pick-up setting ID_adj to be equal to the sum of the differential characteristic pick-up setting ID and the determined DC components, providing an adapted operate-restrain characteristics. Corresponding control device, computer program and computer program product are also disclosed.
    Type: Application
    Filed: January 27, 2016
    Publication date: December 13, 2018
    Inventors: Ivo Brncic, Zhanpeng Shi, Sören Forsman
  • Multi-object protection, control, and monitoring in the same intelligent electronic device
    Patent number: 8305223
    Abstract: An Intelligent Electronic Device with integrated protection, and/or control, and/or monitoring for two power system primary objects or more power system primary objects, responsive to a plurality of inputs from the power system primary objects, and providing a plurality of outputs to the power system primary objects.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: November 6, 2012
    Assignee: ABB Technology Ltd.
    Inventor: Sören Forsman