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Decomposition approach to problem of unit commitment schedule for hydrothermal systems

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2 Author(s)
Baptistella, L.F.B. ; Centre National de la Recherche Scientifique, Laboratoire d'Automatique et d'Analyse des Syst¿¿mes, Toulouse, France ; Geromel, J.C.

A method for determining the unit commitment schedule for hydrothermal systems using extensions of the Benders decomposition approach has been developed. The optimisation problem is partitioned in this paper into a stochastic nonlinear and a pure-integer nonlinear programming problem. The first problem, which represents the simultaneous economic dispatch of thermal and hydraulic power generating units, is solved by a feasible decomposition approach. The model minimises the total expected costs of start-up and unit operating costs subject to stochastic demand, spinning-reserve, and hydroplant, thermal and unit commitment constraints. Numerical results obtained for a small network are presented.

Published in:

Control Theory and Applications, IEE Proceedings D  (Volume:127 ,  Issue: 6 )