Knowledge-based genetic algorithm for unit commitment

C.J. Aldridge, S. McKee, J.R. McDonald, S.J. Galloway, K.P. Dahal, M.E. Bradley, J.F. Macqueen

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


A genetic algorithm (GA) augmented with knowledge-based methods has been developed for solving the unit commitment economic dispatch problem. The GA evolves a population of binary strings which represent commitment schedules. The initial population of schedules is chosen using a method based on elicited scheduling knowledge. A fast rule-based dispatch method is then used to evaluate candidate solutions. The knowledge-based genetic algorithm is applied to a test system of ten thermal units over 24-hour time intervals, including minimum on/off times and ramp rates, and achieves lower cost solutions than Lagrangian relaxation in comparable computational time.
Original languageEnglish
Pages (from-to)146-152
Number of pages7
JournalIEE Proceedings Generation Transmission and Distribution
Issue number2
Publication statusPublished - 31 Mar 2001


  • algorithms
  • computer systems
  • genetics
  • genetic algorithm


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