Source-Load Coordination for Carbon Reduction in IES with Stepwise Carbon Pricing

To achieve the dual carbon goals, this paper proposes a bi-level economic dispatch method for integrated energy systems based on source-load coordination. A low-carbon scheduling framework is established using a stepwise carbon trading mechanism and flexible emission quotas to guide carbon behavior through economic incentives. The upper-level model minimizes costs for energy procurement, carbon trading, and demand response compensation, while the lower-level optimizes EV charging/discharging schedules. Simulation results show that the proposed strategy effectively reduces carbon emissions, improves renewable energy utilization, and enhances system economy. The scenario with stepwise carbon pricing and flexible quotas performs best, highlighting the significant potential of source-load coordination for energy conservation and emission reduction.