Optimal scheduling of a price-taker cascaded reservoir system in a pool-based electricity market

F. Javier Díaz, Javier Contreras, José Ignacio Muñoz, David Pozo

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

A mixed integer nonlinear programming (MINLP) model for scheduling of the short-term integrated operation of a series of price-taker hydroelectric plants (H-GENCO) along a cascaded reservoir system in a pool-based electricity market is presented. The objective of the H-GENCO can be either to maximize profit, taking into account technical efficiency, or to maximize technical efficiency, maintaining a profit level. In both cases, the efficiency can be accurately obtained using the Hill diagram supplied by turbine manufacturers. A multiple nonlinear regression analysis of the unit's technical efficiency is estimated as a quadratic function of net head and water discharge. Several case studies of realistic dimensions are described, where results indicate that a profit-based MINLP produces better results compared to an MILP model, on the other hand, higher efficiencies and water savings are obtained in the efficiency-based model.

Original languageEnglish
Article number5565530
Pages (from-to)604-615
Number of pages12
JournalIEEE Transactions on Power Systems
Volume26
Issue number2
DOIs
Publication statusPublished - May 2011
Externally publishedYes

Keywords

  • Hill diagram
  • hydroelectric generation
  • net head
  • technical efficiency
  • water discharge

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