Patents Assigned to Northern Plains Power Technologies
  • Subharmonic power line carrier based island detection systems and methods
    Patent number: 10326279
    Abstract: Systems and methods for identifying an island condition in a power distribution system and disconnecting distributed generators in the case of islanding. The systems and methods are used to enable reliable detection of island formation with high false-trip immunity, for any combination of distributed energy resources, and for distributed energy resources using grid support functions.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: June 18, 2019
    Assignees: Northern Plains Power Technologies, Sandia Corporation
    Inventors: Michael Ropp, Scott Perlenfein, Jason C. Neely, Sigifredo Gonzalez, Lee Joshua Rashkin