Patents by Inventor Johan A. Lindberg

Johan A. Lindberg 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).

  • Damping electromechanical oscillations in power systems
    Patent number: 8019484
    Abstract: The present disclosure is concerned with the combined voltage or power flow control and damping of electromechanical oscillations in an electric power system by Flexible AC Transmission System (FACTS) devices or High Voltage DC (HVDC) transmission devices. To this end, information about a state or operating point of the power system is generated from suitable second system signals (y2) and a control parameter (cp) of a FACTS controller is derived therefrom. The control parameter and a first system signal (y1) are used in the calculation of a control command (u) defining the settings of the FACTS device. Following a change in the state of the power system such as a change in the topology of a transmission network, poorly damped or even unstable oscillations are avoided by appropriate re-tuning of the control parameter of the damping or stabilizing equipment.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: September 13, 2011
    Assignee: ABB Research Ltd
    Inventors: Petr Korba, Alexandre Oudalov, Mats Larsson, Johan A. Lindberg, Stefan G. Thorburn
  • Damping electromechanical oscillations in power systems
    Publication number: 20080177425
    Abstract: The present disclosure is concerned with the combined voltage or power flow control and damping of electromechanical oscillations in an electric power system by Flexible AC Transmission System (FACTS) devices or High Voltage DC (HVDC) transmission devices. To this end, information about a state or operating point of the power system is generated from suitable second system signals (y2) and a control parameter (cp) of a FACTS controller is derived therefrom. The control parameter and a first system signal (y1) are used in the calculation of a control command (u) defining the settings of the FACTS device. Following a change in the state of the power system such as a change in the topology of a transmission network, poorly damped or even unstable oscillations are avoided by appropriate re-tuning of the control parameter of the damping or stabilizing equipment.
    Type: Application
    Filed: December 7, 2007
    Publication date: July 24, 2008
    Applicant: ABB Research Ltd
    Inventors: Petr Korba, Alexandre Oudalov, Mats Larsson, Johan A. Lindberg, Stefan G. Thorburn