Robust load-frequency control for uncertain nonlinear power systems: A fuzzy logic approach

Ho Jae Lee, Jin Bae Park, Young Hoon Joo

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)


A new robust load-frequency control (LFC) methodology is proposed for controlling uncertain nonlinear power systems. Critical nonlinearity in the power system-the valve position limit on the governor, and the parametric uncertainty are concerned. The Takagi-Sugeno fuzzy model of the power system under consideration is first constructed to design the robust fuzzy-model-based LFC. Sufficient conditions for the robust asymptotic convergence of the frequency deviation are then provided in terms of linear matrix inequalities. Boundedness of the other system variables is also studied to ensure justifiable grounds for use of the proposed LFC method. Simulation results convincingly validate the effectiveness of the novel LFC design scheme and the theoretical discussions, which give a positive answer to the quality control of the electric energy.

Original languageEnglish
Pages (from-to)3520-3537
Number of pages18
JournalInformation sciences
Issue number23
Publication statusPublished - 2006 Dec 4

Bibliographical note

Funding Information:
This work was supported by Inha University Research Grant (INHA-A06-32).

All Science Journal Classification (ASJC) codes

  • Software
  • Control and Systems Engineering
  • Theoretical Computer Science
  • Computer Science Applications
  • Information Systems and Management
  • Artificial Intelligence


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