Abstract: Under the "dual carbon" goal, flexible carbon capture power plants have become an important transitional power source for power supply and low carbonization after large-scale wind and solar grid connection. However, due to the limitation of liquid storage capacity and the characteristics of wind-solar anti-peak regulation, the system has limitations in coping with the continuously increasing load peak-to-valley difference. Therefore, this paper introduces a large-capacity energy storage-pumped storage with bidirectional fast power regulation capability, and proposes a generalized economic dispatch strategy based on the combination of FCCPP and pumped storage. Generalized economic dispatch integrates various elements such as power plant operation cost, net load economic benefit of power grid, and carbon economic benefit. Firstly, make full use of the time-shifting characteristics of energy consumption and the double adjustment ability of pumped storage, and formulate the mechanism of "peak complementarity and valley synergy" under electric carbon decoupling combined with the typical peak-valley characteristics of net load, so as to achieve carbon capture and new energy consumption under deep peak regulation; In addition, a scheduling model with the goal of minimizing the minimum generalized economic cost considering flexibility constraints and other factors in the electricity-carbon market is constructed, the uncertainty of the net load is characterized by fuzzy parameters, and the improved gray wolf algorithm is used to solve it. The simulation results show that the proposed dispatching model can effectively combine the advantages of the two to improve the low-carbon economic benefit of the system; compared with only considering the FCCPP, the comprehensive cost is reduced by 25.33%, the carbon emission is reduced by 18.71%, and the cost of lost wind and solar is reduced by 98.70%, which confirms the superiority of the proposed joint scheduling strategy.