Patents by Inventor Ronald A. Hedin

Ronald A. Hedin 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 means for damping supersynchronous oscillations in an AC power system
    Patent number: 4808843
    Abstract: Damping of supersynchronous oscillations in an ac power system is accomplished by a damping circuit connected between a power line and a system neutral potential. The damping means includes a tuned circuit having a resonant frequency above the system operating frequency. Preferably, the tuned circuit further has an antiresonant frequency at the system frequency. The supersynchronous damping circuit in accordance with the invention can be used with subsynchronous damping circuits known in the prior art to enhance the damping of oscillations in the ac power system.
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: February 28, 1989
    Assignee: Electric Power Research Institute
    Inventor: Ronald A. Hedin
  • Method and means for damping supersynchronous oscillations in an ac power system
    Patent number: 4724333
    Abstract: Damping of supersynchronous oscillations in an ac power system is accomplished by a damping circuit connected between a power line and a system neutral potential. The damping means includes a tuned circuit having a resonant frequency above the system operating frequency. Preferably, the tuned circuit further has an antiresonant frequency at the system frequency. The supersynchronous damping circuit in accordance with the invention can be used with subsynchronous damping circuits known in the prior art to enhance the damping of oscillations in the ac power system.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: February 9, 1988
    Assignee: Electric Power Research Institute
    Inventor: Ronald A. Hedin