Mixed-Integer Minimization of the Cost function of the Unit Commitment problem for Isolated power systems

摘要

Unit Commitment (UC) is a minimization problemthat aims to schedule the required generating units ina power system over some time horizon to meet the demandbased on minimizing the production cost. In thispaper, we present a novel technique to minimize suchfunctions based on Mixed-integer formulation, neglectingthe time horizon and most of the constraints. Thistechnique can be considered as a first step in a betterand tighter mixed-integer formulation of the unit commitmentproblem, especially for isolated power systemsthat contain a small number of generating units. Datafrom isolated power systems on marine vessels are usedto test this technique. The proposed technique requiresmore constraints and binary variables. However, thenumerical results presented in this work, show that theproposed method gives more efficient results for low demand,and close results to those obtained from localminimizers when the demand is high. The computationaltime of the suggested method does not seem to beexplicitly longer than the time taken by the local minimizers,especially for small isolated power systems.