Self-tuning flexible ac transmission system controllers for power oscillation damping: a case study in real time

Design and real-time implementation of a self-tuning flexible ac transmission system (FACTS) controller is illustrated for power oscillation damping. Although the system model is not required for self-tuning control design, it is shown to perform similar to a model-based design. For parameter estima...

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Bibliographic Details
Published inIET generation, transmission & distribution Vol. 3; no. 12; p. 1079
Main Authors Domahidi, A., Chaudhuri, B., Korba, P., Majumder, R., Green, T.C.
Format Journal Article
LanguageEnglish
Published Stevenage The Institution of Engineering & Technology 2009
Subjects
Control systems
Controllers
Damping
Design engineering
FACTS
Mathematical models
Oscillations
Real time
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Summary:Design and real-time implementation of a self-tuning flexible ac transmission system (FACTS) controller is illustrated for power oscillation damping. Although the system model is not required for self-tuning control design, it is shown to perform similar to a model-based design. For parameter estimation, the classical recursive least square is supplemented by a random walk (RW) with a switched structure and compared to standard variable forgetting factor approach. It is shown, that the RW improves the accuracy and convergence of the estimated system parameters, which is critical to self-tuning control, following large disturbances. The performance is validated in real time using a commercial real-time simulation platform. The control computation time is shown to be considerably less than the typical sampling time, used for power oscillation damping applications and demonstrating the feasibility of self-tuning FACTS controllers in practice.
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ISSN:1751-8687
1751-8695
DOI:10.1049/iet-gtd.2008.0310