%0 Journal Article %T Frequency Reserve Within Unit Commitment Considering Spinning Reserve Uncertainty %J International Journal of Energy Engineering %@ 2163-1905 %D 2012 %I %R 10.5923/j.ijee.20120204.10 %X Various technical limitations of generating units and ancillary services requirements have more complicated the power generation control and operation. This paper introduces a novel methodology for day-ahead unit commitment, which is a crucial challenge in restructured power systems, considering primary frequency control reserve. In addition, also spinning reserve uncertainty as a practical constraint has been taken into account. In this paper, we formulate and solve simultaneous scheduling of energy and primary reserve as a mixed integer non linear programming problem that simultaneously accounts aforementioned constraints. In proposed formulation, system frequency is allowed to fall from nominal value to a critical specified limit.Finally, the proposed approach is implemented to the scheduling of a 17-unit isolated power system over 24-hours. Case studies and numerical results present significant outcomes and verify the robustness of the proposed method, while it creates a schedule consistent with the primary frequency control and spinning reserve uncertainty. %K Frequency Deviation %K GAMS %K Load Ramp Rate %K MINLP %K Primary Reserve %K Simultaneous Scheduling %K Spinning Reserve Probability %U http://article.sapub.org/10.5923.j.ijee.20120204.10.html