Optimal Scheduling of Park Integrated Energy System Considering Oxygen-Enriched Combustion and Seasonal Carbon Trading

SU Shiwei; SU Yuzhe; LI Xianshan; Liu Songkai; HU Qingbin; DOU Xiaowan; WANG Kaixuan

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Optimal Scheduling of Park Integrated Energy System Considering Oxygen-Enriched Combustion and Seasonal Carbon Trading

SU Shiwei^1,2, SU Yuzhe¹, LI Xianshan^1,2, Liu Songkai^1,2, HU Qingbin¹, DOU Xiaowan¹, WANG Kaixuan¹

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Abstract

[Objective] To address the issues of high carbon emission intensity in thermal power units, insufficient seasonal constraints of the current annual carbon trading mechanism, and the lack of synergistic carbon reduction mechanisms for oxy-combustion and biomass co-firing carbon capture power plants (BCCPP), this paper proposes an optimal scheduling method for park-level integrated energy systems (PIES) incorporating oxy-combustion and seasonal carbon trading. [Method] Firstly, the oxygen-enriched combustion technology is introduced into the biomass co-combustion carbon capture power plant, and the BCCPP model of oxygen-enriched combustion is constructed to realize the technical coordination of oxygen-enriched combustion and biomass co-combustion at the carbon capture level, and a PIES operation framework model including “energy layer-carbon management layer-scheduling layer” is established. Secondly, in order to break through the limitation of single index allocation of traditional baseline methods and solve the fairness problem of quota allocation among multi-carbon emission entities in the park, a multi-index carbon quota allocation model considering grey relational analysis (GRA) and technique for order preference by similarity to ideal solution (TOPSIS) is proposed to stimulate the low-carbon economic operation of multi-carbon emission entities in PIES. Finally, in order to adapt to the seasonal characteristics of PIES, the step-by-step carbon trading is reclassified according to carbon quotas and actual carbon emissions, and the reward and punishment factor is introduced on the basis of the step-by-step carbon price to form a seasonal carbon trading mechanism considering the reward and punishment mechanism suitable for the actual operation of the park. [Results] The combined utilization of the oxy-combustion BCCPP reduces the energy penalty for carbon capture by 36.31% and cuts the carbon emissions of the generating units by 56.15%. With the integration of the GRA-TOPSIS-based multi-index carbon quota allocation and the seasonal carbon trading mechanism, the annual carbon emissions of the PIES are lowered by 26,577.68 tons, while the operational cost decreases by approximately 5.09×10⁶ CNY, representing a reduction of 0.75%. [Conclusion] Case verification confirms that the seasonal carbon trading mechanism, via differentiated seasonal quota allocation, realizes cross-seasonal quota optimization and enhanced PIES economic-low-carbon coordination.

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oxy-fuel combustion / seasonal carbon trading mechanism / park integrated energy system / multi-index carbon quota allocation / reward and punishment factor

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SU Shiwei, SU Yuzhe, LI Xianshan, Liu Songkai, HU Qingbin, DOU Xiaowan, WANG Kaixuan. Optimal Scheduling of Park Integrated Energy System Considering Oxygen-Enriched Combustion and Seasonal Carbon Trading[J]. Electric Power Construction. 0

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