Abstract: This paper presents a look-ahead optimal dispatch method considering large-scale wind power integration. The conditional value-at-risk of wind power condition is introduced to evaluate the risk of wind power accommodation. A flexible look-ahead dispatch model based on robust optimization is established to balance operating cost and the conditional value-at-risk of wind power. According to the proposed model,the base point,participation factor and flexible capacity of AGC unit are optimized,and the admissible region of wind power on each wind farm is also obtained. An efficient algorithm for bilinear programming model based on the big-M method and the decomposition method is proposed. The proposed model and algorithm combine the advantages of robust optimization and stochastic optimization to ensure the calculation efficiency and avoid the over conservativeness of robust optimization. The simulation results verify the effectiveness of the proposed model and algorithm.