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Suche nach „[M.] [Silbernagl]“ hat 3 Publikationen gefunden
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    DigitalF: Europan Campus Rottal-Inn

    Zeitschriftenartikel

    R. Brandenberg, Matthias Huber, M. Silbernagl

    The summed start-up costs in a unit commitment problem

    EURO Journal on Computational Optimization, vol. 5, no. 1-2, pp. 203-238

    2017

    DOI: 10.1007/s13675-016-0062-2

    Abstract anzeigen

    We consider the sum of the incurred start-up costs of a single unit in a Unit Commitment problem. Our major result is a correspondence between the facets of its epigraph and some binary trees for concave start-up cost functions CU, which is bijective if CU is strictly concave. We derive an exponential H-representation of this epigraph, and provide an exact linear separation algorithm. These results significantly reduce the integrality gap of the Mixed Integer formulation of a Unit Commitment Problem compared to current literature.

    DigitalNachhaltigF: Europan Campus Rottal-Inn

    Zeitschriftenartikel

    M. Silbernagl, Matthias Huber, R. Brandenberg

    Improving Accuracy and Efficiency of Start-Up Cost Formulations in MIP Unit Commitment by Modeling Power Plant Temperatures

    IEEE Transactions on Power Systems, vol. 31, no. 4, pp. 2578-2586

    2016

    DOI: 10.1109/TPWRS.2015.2450776

    Abstract anzeigen

    This paper presents an improved mixed-integer model for the thermal unit commitment problem. By introducing new variables for the temperature of each thermal unit, the off-time-dependent start-up costs are modeled accurately and with a lower integrality gap than state-of-the-art formulations. This new approach significantly improves computational efficiency compared to existing formulations, even if they only model a rough approximation of the start-up costs. Our findings were validated on real-world test cases using CPLEX.

    DigitalNachhaltigF: Europan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    Matthias Huber, M. Silbernagl

    Modeling start-up times in unit commitment by limiting temperature increase and heating

    Proceedings of the 2015 12th International Conference on the European Energy Market (EEM)

    2015

    DOI: 10.1109/EEM.2015.7216755

    Abstract anzeigen

    The integration of variable renewable energy sources leads to an increased cycling of conventional power plants, necessitating a detailed model of the start-up process. Based on the recently developed temperature formulation for startup costs in Unit Commitment, we model the off-time-dependent start-up times of thermal units by limiting temperature increase and heating. Numerical results indicate that limiting heating speed is more efficient and leads only to a moderate increase in computational time.