The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2011
Filed:
Dec. 07, 2007
Petr Korba, Turgi, CH;
Alexandre Oudalov, Fislisbach, CH;
Mats Larsson, Baden, CH;
Johan A. Lindberg, Göteborg, SE;
Stefan G. Thorburn, Västeras, SE;
Petr Korba, Turgi, CH;
Alexandre Oudalov, Fislisbach, CH;
Mats Larsson, Baden, CH;
Johan A. Lindberg, Göteborg, SE;
Stefan G. Thorburn, Västeras, SE;
ABB Research Ltd, Zurich, CH;
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 (y) and a control parameter (cp) of a FACTS controller is derived therefrom. The control parameter and a first system signal (y) 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.