Two-Stage Optimal Dispatch for Integrated Energy System with Oxy-Combustion Based on Multi-Energy Flexibility Constraints

doi:10.16183/j.cnki.jsjtu.2023.487

Abstract

Abstract:

As one of the most promising carbon capture technologies for coal-fired power plants, oxy-fuel combustion provides a new solution for improving the flexibility of the integrated energy system (IES) and reducing carbon emissions. In this paper, a two-stage optimal dispatch strategy for the integrated energy system with oxy-fuel combustion units considering the constraints of multi-energy flexibility is proposed based on the intergration of oxy-fuel combustion technology and the optimal operation of the integrated energy system. First, a model of integrated energy system with oxy-fuel combustion (Oxy-IES) is established. Then, a matrix model of multi-energy flexibility constraints for Oxy-IES is proposed to reveal the supply and demand relationship of flexibility within the system. Finally, a two-stage optimization dispatch strategy for Oxy-IES is constructed, in which the output of each unit is optimized to minimize the daily operating cost of carbon trading in the day-ahead stage, while the rapid variable load capacity of the oxy-fuel combustion unit improves the flexibility of the system in the intraday stage. The simulation results of Oxy-IES show that the proposed strategy can improve the flexibility and economy performance of the IES while reducing carbon emissions.

Key words: integrated energy system (IES), oxy-fuel combustion, flexibility constraints, two-phase optimized dispatch

CLC Number:

TM732
TK018

PENG Chuxuan, BIAN Xiaoyan, JIN Haixiang, LIN Shunfu, XU Bo, ZHAO Jian. Two-Stage Optimal Dispatch for Integrated Energy System with Oxy-Combustion Based on Multi-Energy Flexibility Constraints[J]. Journal of Shanghai Jiao Tong University, 2025, 59(9): 1281-1291.

Figures/Tables 10

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场景	总成本 ×10^-5/美元	碳交易成本 ×10^-3/美元	碳排放量 ×10^-3/t
1	6.18321	-8.750	4.6651
2	6.02239	-7.299	3.0716
3	6.52720	-6.636	3.8769

策略	运行成本/ 美元	偏差成本/ 美元	外购功率/ MW
富氧燃烧机组调节 (ASU变负荷)	642321	8750	126.51
外购能源(DA-P)	656430	6636	343.46