Abstract
This paper provides a sensitivity analysis of the interaction between the dynamic response of power systems and the unit commitment problem. A sub-hourly, mixed-integer linear programming Security Constrained Unit Commitment (SCUC) with a 24-hour rolling horizon is considered to cope with the uncertainty introduced by the large-scale penetration of nonsynchronous, stochastic renewable energy sources (RES). The SCUC is then integrated into Time Domain Simulations (TDS) and a sensitivity analysis with respect to different frequency controllers/machine parameters and different scheduling time intervals is carried out. Simulation results based on the 39-bus system show that shorter scheduling periods of the SCUC leads to lower operating cost and lower frequency variations.
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