Low carbon and economic dispatching of electric-gas integrated energy system with liquid storage carbon capture equipment

Because of the coupling of CO2 absorption and treatment, conventional carbon capture power plants lack the flexibility of power plant operation. This paper provides a liquid storage carbon capture power plant (LSCCPP) with solution storage, analyzes the “energy time-shift” features of the solution storage, and creates a joint operating model of the LSCCPP and Power to Gas(P2G) based on this. Taking into account the carbon market trading mechanism, this paper develops a low-carbon economic dispatch model for an integrated electric-gas energy system with the LSCCPP, with the goal of achieving the lowest overall system cost. Moreover, the proposed dispatch model is solved by transforming the model into a mixed-integer linear programing problem and calling CPLEX. Finally, a modified example system is used to demonstrate the validity of the proposed model. The results show that the suggested low-carbon dispatch model has a significant reference for enhancing the system’s use of wind power and accomplishing the low-carbon efficient functioning of the integrated electric-gas energy system.