Adaptive fuzzy logic load frequency control of multi-area power system

Hassan Yousef*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

104 Citations (Scopus)


Based on indirect adaptive fuzzy control technique, a new load frequency control (LFC) scheme for multi-area power system is proposed. The power systems under study have the characterization of unknown parameters. Local load frequency controller is designed using the frequency and tie-line power deviations of each area. In the controller design, the approximation capabilities of fuzzy systems are employed to identify the unknown functions, formulate suitable adaptive control law and updating algorithms for the controller parameters. It is proved that the proposed controller ensures the boundedness of all variables of the closed-loop system and the tracking error. Moreover, in the proposed controller an auxiliary control signal is introduced to attenuate the effect of fuzzy approximation error and to mitigate the effect of external disturbance on the tracking performance. Simulation results of a three-area power system are presented to validate the effectiveness of the proposed LFC and show its superiority over a classical PID controller.

Original languageEnglish
Pages (from-to)384-395
Number of pages12
JournalInternational Journal of Electrical Power and Energy Systems
Publication statusPublished - Jun 2015


  • Adaptive
  • Fuzzy control
  • Load frequency
  • Multi-area

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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