Long-term optimization of cogeneration systems in a competitive market environment

Eva Thorin, Heike Brand and Christoph Weber

Applied Energy, 2005, vol. 81, issue 2, 152-169

Abstract: A tool for long-term optimization of cogeneration systems is developed that is based on mixed integer linear-programming and Lagrangian relaxation. We use a general approach without heuristics to solve the optimization problem of the unit commitment problem and load dispatch. The possibility to buy and sell electric power at a spot market is considered as well as the possibility to provide secondary reserve. The tool has been tested on a demonstration system based on an existing combined heat-and-power (CHP) system with extraction-condensing steam turbines, gas turbines, boilers for heat production and district-heating networks. The key feature of the model for obtaining solutions within reasonable times is a suitable division of the whole optimization period into overlapping sub-periods. Using Lagrangian relaxation, the tool can be applied to large CHP systems. For the demonstration model, almost optimal solutions were found.

Keywords: Cogeneration; Linear; programming; Optimization; methods; Planning; Power; generation; Power; generation; dispatch; Unit; commitment (search for similar items in EconPapers)
Date: 2005
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Citations: View citations in EconPapers (43)

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