Patents by Inventor Lars Cramer

Lars Cramer 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 for stabilizing an electric grid
    Patent number: 9106152
    Abstract: A method for grid support by means of an inverter is disclosed, wherein the grid is supported by feeding in compensation currents. The method includes measuring a prevailing grid state, and breaking down voltages measured for measuring the prevailing grid state into symmetrical components of the grid state including positive sequence system components and negative sequence system components. The method further includes determining symmetrical components of a compensation current including positive sequence system components and negative sequence system components of the compensation current as functions of deviations of the positive sequence system components and negative sequence system components of the grid state from reference values, and feeding-in a compensation current as the vector sum of the determined symmetrical components of the compensation current.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: August 11, 2015
    Assignee: SMA Solar Technology AG
    Inventors: Karel De Brabandere, Vitali Sakschewski, Lars Cramer, Yehia Tarek Fawzy, Stijn Stevens, Daniel Premm