Hybrid Component and Configuration Model for Combined-Cycle Units in Unit Commitment Problem

Xin Fang, Brian Hodge, Linquan Bai, Fangxing Li

Research output: Contribution to journalArticlepeer-review

8 Scopus Citations


This letter proposes a novel hybrid component and configuration model for combined-cycle gas turbines (CCGTs) participating in independent system operator (ISO) markets. The proposed model overcomes the inaccuracy issues in the current configuration-based model while retaining its simple and flexible bidding framework of configuration-based models. The physical limitations—such as minimum online/offline time and ramping rates—are modeled for each component separately, and the cost is calculated with the bidding curves from the configuration modes. This hybrid mode can represent the current dominant bidding model in the unit commitment problem of ISOs while treating the individual components in CCGTs accurately. The commitment status of the individual components is mapped to the unique configuration mode of the CCGTs. The transitions from one configuration mode to another are also modeled. No additional binary variables are added, and numerical case studies demonstrate the effectiveness of this model for CCGT units in the unit commitment problem.

Original languageAmerican English
Pages (from-to)1332-1337
Number of pages6
JournalJournal of Modern Power Systems and Clean Energy
Issue number6
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018, The Author(s).

NREL Publication Number

  • NREL/JA-5D00-70055


  • Combined-cycle gas turbines (CCGTs)
  • Component-based model
  • Configuration-based model
  • Unit commitment


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