Optimization Model and Algorithm of Unit Commitment Considering Operational Flexibility

摘要

To improve the operational flexibility of power system with wind power integrated, a method of unit commitment decision-making based on scenario analysis is proposed. The typical scenario set of wind power output is obtained via K-medoids clustering method, and the size of scenario set is determined according to the typicality evaluation indices. With economy and flexibility as the objective, a unit commitment model combined with multi-scenario economic dispatch is formulated. To enhance the solution efficiency, an improved Benders decomposition method with light tolerance of power flow limit violation is proposed, which reduces the dimensions of the constraint matrix. The case study illustrates the effectiveness of the proposed model and algorithm for operation optimization.