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A network flow model for short-term hydro-dominated hydrothermal scheduling problems

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3 Author(s)
Franco, P.E.C. ; DEE/FT, Brasilia Univ., Brazil ; Carvalho, M.F. ; Soares, S.

This paper is concerned with the short-term hydrothermal scheduling (STHS) of hydro-dominated power systems. The problem's formulation includes the representation of operational constraints such as the hydraulic coupling between hydro plants in cascade and the transmission limits in the electric network. In order to allow the problem's decomposition into hydraulic and electric subproblems, a linear-quadratic penalty approach is applied to enforce the coupling between hydro and electric variables. As a result, the problem's natural network flow structure is fully exploited through special-purposed network flow algorithms. The technique has been implemented in FORTRAN in a SUN SPARCstation IPX and tested in a 440 kV subsystem of the main interconnected Brazilian power system

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Power Systems, IEEE Transactions on  (Volume:9 ,  Issue: 2 )