Improving transient stability using fast valving based on tracking rotor-angle and active power

George G. Karady, Mansour A. Mohamed

Research output: Chapter in Book/Report/Conference proceedingConference contribution

21 Scopus citations


This paper proposes a multi-agent technique that is divided into two parts. The first part is a tracking agent that will track generators rotor angle to determine power system instability. According to the tracking agent's output, control agent is initiated. The tracking agent uses off-line time domain analysis to build look-up tables of required fast valving. The tracking agent employs two sub-agents. The first sub-agent determines if fast valving is required to attain transient stability for each credible system disturbance and operating condition. The second sub-agent compares the electric power for each generator before and after the disturbance to determine the appropriate reduction of mechanical power to stabilize the system. The control agent is turbine fast valving. The resulting multi-agent technique can determine system instability and establish system stability. Decoded MATLAB programs of both agents are linked to ETMSP program, power system simulation program, used in verifying the results.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Power Engineering Society Transmission and Distribution Conference
Number of pages6
StatePublished - 2002
Event2002 IEEE Power Engineering Society Summer Meeting - Chicago, IL, United States
Duration: Jul 21 2002Jul 25 2002


Other2002 IEEE Power Engineering Society Summer Meeting
Country/TerritoryUnited States
CityChicago, IL


  • Fast valving
  • Rotor-angle
  • Transient stability

ASJC Scopus subject areas

  • General Engineering
  • General Energy


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