Patents by Inventor Sture Lindhal

Sture Lindhal 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 equipment for the protection of power systems against geomagnetically induced currents
    Patent number: 7489485
    Abstract: The present invention relates to a method for protection of power transformers and other power system components, which are vulnerable to geomagnetically induced currents, which comprises feeding from an overhead line/s or cable conductor/s one or more DC-diverter consisting of primary diverter windings and compensation windings applied on a respective magnetic core leg, which diverter is connected to critical busses, and diverting “quasi” direct current flowing on the overhead lines or cable conductors as a result of the earth surface potential gradients caused by geomagnetically induced currents, as well as a DC diverter to carry out the method.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: February 10, 2009
    Assignee: Forskarpatent I Syd AB
    Inventors: Mats A F Klercker Alakula, Sture Lindhal
  • METHOD AND EQUIPMENT FOR THE PROTECTION OF POWER SYSTEMS AGAINST GEOMAGNETICALLY INDUCED CURRENTS
    Publication number: 20070217103
    Abstract: The present invention relates to a method for protection of power transformers and other power system components, which are vulnerable to geomagnetically induced currents, which comprises feeding from an overhead line/s or cable conductor/s one or more DC-diverter consisting of primary diverter windings and compensation windings applied on a respective magnetic core leg, which diverter is connected to critical busses, and diverting “quasi” direct current flowing on the overhead lines or cable conductors as a result of the earth surface potential gradients caused by geomagnetically induced currents, as well as a DC diverter to carry out the method.
    Type: Application
    Filed: November 7, 2006
    Publication date: September 20, 2007
    Applicant: FORSKARPATENT I SYD AB
    Inventors: Mats AF Klercker Alakula, Sture Lindhal