Article ID: | iaor20033169 |
Country: | Netherlands |
Volume: | 120 |
Issue: | 1 |
Start Page Number: | 21 |
End Page Number: | 44 |
Publication Date: | Apr 2003 |
Journal: | Annals of Operations Research |
Authors: | Sagastizbal C.A., Lima A.L. Diniz Souto, Maceira M.E. Pieiro, Belloni A. |
Keywords: | Brazil |
We consider the inclusion of commitment of thermal generation units in the optimal management of the Brazilian power system. By means of Lagrangian relaxation we decompose the problem and obtain a nondifferentiable dual function that is separable. We solve the dual problem with a bundle method. Our purpose is twofold: first, bundle methods are the methods of choice in nonsmooth optimization when it comes to solve large-scale problems with high precision. Second, they give good starting points for recovering primal solutions. We use an inexact augmented Lagrangian technique to find a near-optimal primal feasible solution. We assess our approach with numerical results.