Multi-time Scale Low-Carbon Economic Dispatch of Power System Considering the Time-Shift Characteristics of Energy Consumption of Carbon Capture Power Plant

Abstract

Vigorously developing new energy sources such as wind power is an important means to achieve the dual-carbon goal. But, wind power output is fluctuating and random, and its prediction accuracy improves with the shortening of the time scale, and the regulation rate of conventional thermal power plants is slow, making it difficult to cope with real-time wind power and load. Therefore, the traditional day-ahead scheduling strategy has been difficult to meet the requirements of system flexibility and economy. Based on this problem, this paper proposes a multi-time-scale low-carbon economic dispatch strategy for power system considering the time-shift characteristics of CCPP energy consumption. Firstly, the energy consumption time-shift characteristics of the integrated flexible CCPP are analyzed, and its participation in multi-time scale low-carbon scheduling mechanism and scheduling advantages are discussed, and a multi-time scale framework is given. Secondly, aiming at the optimal total system cost, constructs a day-ahead intra-day real-time three-stage low-carbon economic dispatch model of the power system. Finally, the dispatching model is solved by using the commercial optimization software CPLEX. The results of the IEEE-39 node calculation example show that the dispatching strategy proposed in this paper can effectively reduce the phenomenon of wind curtailment and load loss, and achieve the goal of low-carbon economic dispatch.