Estimating Maximal Annual Energy Given Heterogeneous Hydropower Generating Units with Application to the Three Gorges System
Publication: Journal of Water Resources Planning and Management
Volume 139, Issue 3
Abstract
A hierarchical optimization method is presented for an assessment of the potential maximum energy output of the Three Gorges Project and Gezhouba cascade hydropower stations in China. The optimization incorporates a detailed description of daily load dispatching among different types of hydropower units. The optimization method is divided into three levels to render feasible the computation of the global optimization problem. In levels 1 and 2, a genetic algorithm is applied to optimize discharge and water head distribution between the upstream and downstream reservoirs. Level 1 selects the water levels at the beginning of each month in a year. Level 2 selects the water levels at the beginning of each day in a month. Level 3 solves a linear programming problem for allocation of water among the heterogeneous types of hydropower generation. Hydrological data of the years 2004 and 2005 are used to perform an optimized power generation process within the operating rules. The maximal annual energy production could be approximately 61 and 87 MWh higher than the actual recorded energy production in 2004 and 2005, respectively.
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Acknowledgments
The Three Gorges Corporation and the National Key Technology Research and Development Program No. 2008BAB29B09 and No. 2009BAC56B03 in China supported this research. A fellowship from Chinese government to visit Cornell University for one year supported Fang-Fang Li. NSF grants EAR0711491 and CBET 075675 partially supported C. A. Shoemaker.
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Published In
Journal of Water Resources Planning and Management
Volume 139 • Issue 3 • May 2013
Pages: 265 - 276
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Mar 29, 2011
Accepted: Apr 4, 2012
Published online: Apr 11, 2012
Published in print: May 1, 2013
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