R. D. Lobato

Stochastic Hydro-thermal Unit Commitment via Multi-level Scenario Trees and Bundle Regularization

  • Vitor de Matos
  • Claudia Sagastizábal
  • Erlon Finardi
  • R. D. Lobato
  • Asgeir Tomasgard
    • Categories Nonlinear Optimization, Stochastic Programming

    For an electric power mix subject to uncertainty, the stochastic unit-commitment problem finds short-term optimal generation schedules that satisfy several system-wide constraints. In regulated electricity markets, this very practical and important problem is used by the system operator to decide when each unit is to be started or stopped, and to define how to generate … Read more

    Large-scale packing of ellipsoids

  • Ernesto G. Birgin
  • R. D. Lobato
    • Categories Nonlinear Optimization Tags , , ,

    The problem of packing ellipsoids in the n-dimensional space is considered in the present work. The proposed approach combines heuristic techniques with the resolution of recently introduced nonlinear programming models in order to construct solutions with a large number of ellipsoids. Numerical experiments illustrate that the introduced approach delivers good quality solutions with a computational … Read more