富氧燃烧作为目前最具潜力的燃煤电厂碳捕集技术，为综合能源系统灵活性提升与碳减排提供了新的解决思路。本文从融合富氧燃烧技术与综合能源系统优化运行的角度，提出了计及多能灵活性约束的含富氧燃烧机组综合能源系统两阶段优化调度策略。首先建立含富氧燃烧机组的综合能源系统（Oxy-fuel combustion IES，Oxy-IES）模型；提出适用于Oxy-IES的多能灵活性约束，通过矩阵模型揭示Oxy-IES灵活性供需关系；构建Oxy-IES两阶段优化调度策略，日前阶段以考虑碳交易的日运行成本最小为目标优化各设备出力，日内阶段利用富氧燃烧机组的快速变负荷能力提升系统灵活性。Oxy-IES算例仿真表明，所提策略能够提升综合能源系统灵活性和经济性、降低碳排放。

As the most potential carbon capture technology for coal-fired power plants, oxy-fuel combustion provides a new solution for improving the flexibility of the integrated energy system and reducing carbon emissions. Based on integrating oxy-fuel combustion technology and the optimal operation of the integrated energy system, a two-stage optimal dispatch strategy for the integrated energy system with oxy-fuel combustion units considering the constraints of multi-energy flexibility is proposed. Firstly, the model of integrated energy system with oxy-fuel combustion (Oxy-IES) is established. The matrix model of multi-energy flexibility constraints for Oxy-IES is proposed, to reveal the supply and demand relationship of Oxy-IES flexibility. The two-stage optimization dispatch strategy for Oxy-IES is constructed, in which the output of each equipment is optimized with the lowest daily operating cost of carbon trading in the day ahead stage, and the rapid variable load capacity of the oxy-fuel combustion unit can improve the flexibility of the system in the intraday stage. The simulation results of Oxy-IES show that the proposed strategy can improve the flexibility and economy of IES and reduce carbon emissions.