Optimization of Large-Scale Hydrothermal System Operation
Publication: Journal of Water Resources Planning and Management
Volume 138, Issue 2
Abstract
This paper presents the development of a mathematical model to optimize the management and operation of the Brazilian hydrothermal system. The system consists of a large set of individual hydropower plants and a set of aggregated thermal plants. The energy generated in the system is interconnected by a transmission network so it can be transmitted to centers of consumption throughout the country. The optimization model offered is capable of handling different types of constraints, such as interbasin water transfers, water supply for various purposes, and environmental requirements. Its overall objective is to produce energy to meet the country’s demand at a minimum cost. Called HIDROTERM, the model integrates a database with basic hydrological and technical information to run the optimization model, and provides an interface to manage the input and output data. The optimization model uses the General Algebraic Modeling System (GAMS) package and can invoke different linear as well as nonlinear programming solvers. The optimization model was applied to the Brazilian hydrothermal system, one of the largest in the world. The system is divided into four subsystems with 127 active hydropower plants. Preliminary results under different scenarios of inflow, demand, and installed capacity demonstrate the efficiency and utility of the model. From this and other case studies in Brazil, the results indicate that the methodology developed is suitable to different applications, such as planning operation, capacity expansion, and operational rule studies, and trade-off analysis among multiple water users.
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Acknowledgments
The research reported herein was supported by FAPESP (Fundação de Amparo a Pesquisa do Estado de São Paulo), Brazil, under Award No. UNSPECIFIED2008/58508-1. Additional support was provided by the FCTH (Fundação Centro Tecnológico de hidráulica), Brazil. The authors would like to acknowledge the constructive and in-depth reviews of two anonymous reviewers.
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© 2012 American Society of Civil Engineers.
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Received: Apr 23, 2010
Accepted: Feb 18, 2011
Published online: Feb 21, 2011
Published in print: Mar 1, 2012
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