Hydro Unit Commitment via Mixed Integer Linear Programming: A Case Study of the Three Gorges Project, China

This paper develops a methodology for optimizing the hydro unit commitment (HUC) for the Three Gorges Project (TGP) in China. The TGP is the world's largest and most complex hydropower system in operation. The objective is to minimize the total operational cost. The decision variables are the s...

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Veröffentlicht in:IEEE transactions on power systems Jg. 29; H. 3; S. 1232 - 1241
Hauptverfasser: Xiang Li, Tiejian Li, Jiahua Wei, Guangqian Wang, Yeh, William W-G
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.05.2014
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
China
Computational modeling
Hydro unit commitment
Hydroelectric plants
Hydroelectric power generation
hydropower
Integer programming
Linear programming
Mathematical analysis
Mathematical model
Mathematical models
Mixed integer
Mixed integer linear programming
Nonlinearity
Power generation
Reservoirs
Three Gorges Project (China)
Unit commitment
ISSN:0885-8950, 1558-0679
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Zusammenfassung:This paper develops a methodology for optimizing the hydro unit commitment (HUC) for the Three Gorges Project (TGP) in China. The TGP is the world's largest and most complex hydropower system in operation. The objective is to minimize the total operational cost. The decision variables are the startup or shutdown of each of the available units in the system and the power releases from the online units. The mathematical formulation must take into account the head variation over the operation periods as the net head changes from hour to hour and affects power generation. Additionally, the formulation must consider the operation of 32 heterogeneous generating units and the nonlinear power generation function of each unit. A three-dimensional interpolation technique is used to accurately represent the nonlinear power generation function of each individual unit, taking into account the time-varying head as well as the non-smooth limitations for power output and power release. With the aid of integer variables that represent the on/off and operation partition statuses of a unit, the developed HUC model for the TGP conforms to a standard mixed integer linear programming (MILP) formulation. We demonstrate the performance and utility of the model by analyzing the results from several scenarios for the TGP.
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ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2013.2288933