Modeling and simulation analysis of capacity optimization configuration for low-carbon energy systems in oxygen-enriched coal-fired power plants using wind power for oxygen production

This study develops a low-carbon integrated energy system that couples wind power with an oxygen-enriched coal plant and CO2 capture (LCES-OCPP-WPPO), enabling electrolyzer hydrogen-oxygen decoupling and flexible plant load shifting. A two-phase source-load scenario reduction method is used to generate representative wind-electric load profiles. To better reflect policy incentives, an improved tiered carbon trading mechanism is embedded into a capacity-operation co-optimization model. Case studies show that the proposed framework significantly enhances techno-economic and environmental performance. Compared with the conventional carbon trading setting, the improved mechanism reduces the annual total cost by 3.95% while cutting actual CO2 emissions by 61.35%. Meanwhile, wind curtailment is further mitigated, and the CO2 capture device operating ratio increases from 28.25% to 70.59%, indicating stronger utilization of capture capacity. Overall, the proposed framework provides a scalable pathway to coordinate renewable integration, oxygen supply, and carbon mitigation under market-based carbon policies.