Optimal Scheduling of Integrated Energy Systems Considering Oxy-Fuel Power Plants and Carbon Trading

Hui Li (), Xianglong Bai, Hua Li and Liang Bai
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Hui Li: School of Electrical Engineering, Xi’an University of Technology, Xi’an 710048, China
Xianglong Bai: School of Electrical Engineering, Xi’an University of Technology, Xi’an 710048, China
Hua Li: Electric Power Research Institute of State Grid Shaanxi Electric Power Company, Xi’an 710100, China
Liang Bai: College of Hydraulic and Hydropower Engineering, Xi’an University of Technology, Xi’an 710048, China

Energies, 2025, vol. 18, issue 14, 1-23

Abstract: To reduce carbon emission levels and improve the low-carbon performance and economic efficiency of Integrated Energy Systems (IESs), this paper introduces oxy-fuel combustion technology to transform traditional units and proposes a low-carbon economic dispatch method. Considering the stepwise carbon trading mechanism, it provides new ideas for promoting energy conservation, emission reduction, and economic operation of integrated energy systems from both technical and policy perspectives. Firstly, the basic principles and energy flow characteristics of oxy-fuel combustion technology are studied, and a model including an air separation unit, an oxygen storage tank, and carbon capture equipment is constructed. Secondly, a two-stage power-to-gas (P2G) model is established to build a joint operation framework for oxy-fuel combustion and P2G. On this basis, a stepwise carbon trading mechanism is introduced to further constrain the carbon emissions of the system, and a low-carbon economic dispatch model with the objective of minimizing the total system operation cost is established. Finally, multiple scenarios are set up for simulation analysis, which verifies that the proposed low-carbon economic optimal dispatch strategy can effectively reduce the system operation cost by approximately 21.4% and improve the system’s carbon emission level with a total carbon emission reduction of about 38.3%. Meanwhile, the introduction of the stepwise carbon trading mechanism reduces the total cost by 12.3% and carbon emissions by 2010.19 tons, increasing the carbon trading revenue.

Keywords: integrated energy system; carbon trading mechanism; oxy-fuel combustion technology; low-carbon economic dispatch (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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