Minimum loss predispatch model for hydroelectric power systems

Author

Soares, S. ; Salmazo, C.T.

Author_Institution

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

Volume

12

Issue

3

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

1220

Lastpage

1228

Abstract

A predispatch model that minimizes generation and transmission losses on hydroelectric power systems is presented and applied to the hydroelectric power system of COPEL, a Brazilian utility located in Southern Brazil. Power loss in the generation and transmission systems is minimized on an hourly basis throughout a day. Load demand as well as generation, transmission and interchange operational constraints are satisfied. Hydroelectric generation characteristics are described in detail. Power loss in hydroelectric generation is associated with a reduction in turbine-generator efficiency and effective water head. The latter is due to an increase in tailrace elevation and penstock head loss. Power loss upon transmission is calculated as a quadratic function of active power flow, as represented in a DC load flow model. The predispatch model was evaluated under typical operational conditions, achieving significant savings with respect to actual operation

Keywords

hydroelectric power stations; losses; minimisation; power system planning; transmission network calculations; Brazil; DC load flow model; active power flow; effective water head; generation losses; hydroelectric generation characteristics; hydroelectric power systems; minimum loss predispatch model; operational constraints; penstock head loss; power losses; tailrace elevation; transmission losses; turbine-generator efficiency; Character generation; Hydroelectric power generation; Load flow; Load modeling; Power engineering and energy; Power generation; Power system modeling; Power system planning; Propagation losses; Thermal management;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.630464

Filename

630464