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An Improved Incremental Economic Dispatch Method for Hydroelectric Generators with Nonconvex Energy Production Cost Curves

by Lorelynn M. Rux, Bureau of Reclamation, Denver, United States,



Document Type: Proceeding Paper

Part of: Waterpower '91: A New View of Hydro Resources

Abstract:

The Bureau of Reclamation (Reclamation) has undertaken a program to improve water resource management at its hydroelectric powerplants. One feature of the resource optimization program involves the development of economic dispatch methods which will enable plant operators to meet power and water demands while increasing overall operating efficiency. The economic dispatch method described herein is capable of using nonconvex generator flow slope curves to determine an economical energy allocation. The algorithm has been designed and simulated using a computer model of the Lower Colorado River Basin's hydraulic and electric power systems. Simulation results demonstrate that the economic dispatch method yields significant efficiency improvements with sufficient speed for practical application.

Subject Headings: Hydro power | Water resources | Electric power | Power plants | Economic factors | Water reclamation | Electrical systems | Colorado River

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