Dynamic dispatch of hydro generating units

Author

Soares, S. ; Ohishi, T. ; Cicogna, M. ; Arce, A.

Author_Institution

Fac. of Electr. & Comput. Eng., UNICAMP, Campinas, Brazil

Volume

2

fYear

2003

fDate

23-26 June 2003

Abstract

This work is concerned with the dynamic dispatch of hydro generating units. A performance criterion that takes into account variations in tailrace elevation, penstock head losses and turbine-generator efficiencies is considered. A heuristic procedure based on Lagrangian relaxation is applied to solve the dynamic dispatch problem of scheduling generation on an hourly basis during a day. The approach has been tested on a hydro system composed of nine hydro plants of the Brazilian power system. The generation scheduling verified on a typical day was considered for comparison with the solution provided by the approach and the results show a significant improvement in terms of hydro generation efficiency.

Keywords

hydroelectric power stations; power generation dispatch; power generation scheduling; turbogenerators; Brazilian power system; Lagrangian relaxation method; dynamic dispatch; hydro generating units; hydro generation efficiency; hydro plants; penstock head losses; power generation scheduling; tailrace elevation; turbine-generator efficiency; Costs; Hydroelectric power generation; Lagrangian functions; Power generation; Power generation dispatch; Power generation economics; Power generation planning; Power system dynamics; Power system planning; Thermal loading;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Tech Conference Proceedings, 2003 IEEE Bologna

Print_ISBN

0-7803-7967-5

Type

conf

DOI

10.1109/PTC.2003.1304671

Filename

1304671