A Novel Linearization Variant of Reliability Costs in the Optimal Scheduling Model

Reliability costs are used to evaluate the influence of large-scale wind power integration on security constrained unit commitment (SCUC), but the nonlinear expressions of reliability costs increase the complexity of the SCUC model. To address this issue, this letter presents a novel variant to exactly linearize the nonlinear expressions. Compared with the traditional approach, the proposed variant can reduce the number of binary variables, such that the computational performance of the SCUC model is significantly improved. Numerical results of the IEEE reliability test system verify the effectiveness of the proposed variant.