Print Email Facebook Twitter Dynamic Ramping Model Including Intraperiod Ramp-Rate Changes in Unit Commitment Title Dynamic Ramping Model Including Intraperiod Ramp-Rate Changes in Unit Commitment Author Correa-Posada, Carlos M. (External organisation) Morales-Espana, G. (TU Delft DC systems, Energy conversion & Storage) Dueñas, Pablo (Massachusetts Institute of Technology) Sánchez-Martín, Pedro (Comillas Pontifical University) Date 2017 Abstract The growing increase of renewable generation worldwide is posing new challenges for a secure, reliable and economic operation of power systems. In order to face the uncertain and intermittent production of renewable sources, operating reserves must be allocated efficiently and accurately. Nowadays, these reserves are mainly assigned to thermal units, especially gas-fired generators, due to their operation flexibility and fast response. However, the ramping capabilities of these units define the grade of flexibility offered to the system operation. In practical applications, ramping limits are dynamic, i.e., they are a function of the unit's generating output. Omitting this feature leads to suboptimal or even infeasible reserve allocations, thus increasing not only operating reserve requirements but also transactions in real-time balancing markets needed to back up deviations of renewable generation. This paper contributes with a mixed-integer linear programming model for units' dynamic ramping allowing intraperiod changes in the unit commitment problem. As a result, operating reserves are better allocated and the units' flexibility is managed more efficiently than traditional ramping models found in the literature. Different case studies illustrate the functioning and benefits of the proposed formulation. Subject Dynamic schedulingOptimizationPower system dynamicsReal-time systemsReliabilityTrajectoryDynamic rampingmixed-integer linear programmingreservesthermal unitsunit commitment To reference this document use: http://resolver.tudelft.nl/uuid:27d20542-1a6f-4795-a1e7-941ea7d7b381 DOI https://doi.org/10.1109/TSTE.2016.2578302 ISSN 1949-3029 Source IEEE Transactions on Sustainable Energy, 8 (1), 43-50 Part of collection Institutional Repository Document type journal article Rights © 2017 Carlos M. Correa-Posada, G. Morales-Espana, Pablo Dueñas, Pedro Sánchez-Martín Files PDF Dynamic_Ramping_UC.pdf 507.75 KB Close viewer /islandora/object/uuid:27d20542-1a6f-4795-a1e7-941ea7d7b381/datastream/OBJ/view