Optimization Methodology for Carbon Capture Reformation Schemes in Thermal Power Plants Considering the Power Flexible Ramping Demand

WU Kailang; SHAN Lanqing; BO Liming; CHENG Xueting; LIU Xinyuan; CAI Zhi; GUO Hongye; LI Yinxiao

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Optimization Methodology for Carbon Capture Reformation Schemes in Thermal Power Plants Considering the Power Flexible Ramping Demand

WU Kailang¹, SHAN Lanqing¹, BO Liming², CHENG Xueting², LIU Xinyuan², CAI Zhi³, GUO Hongye¹, LI Yinxiao¹

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Abstract

[Objective] In the context of high percentage renewable energy integration, in order to meet the system flexibility and low-carbon demand, an optimization method for carbon capture reformation of thermal power plants considering the power flexible ramping demand was proposed. [Methods] Firstly, a calculation model for power system flexibility demand was established to address the ramping demand surge caused by large-scale wind and photovoltaic power integration. Secondly, a flexible operation model of thermal power units considering carbon capture reformation was established and its flexible ramping supply capacity is quantified. Then, considering the uncertainty of load and renewable energy, a flexible ramping demand constraint was introduced, and a fuzzy opportunity-constrained model was introduced to establish a carbon capture reformation planning model of thermal power plants. This model jointly solved the carbon capture reformation planning problem and the operation optimization problem of thermal power units to obtain the optimal carbon capture reformation solution. Finally, the effectiveness of the planning model was verified with examples, and the impacts of different unit carbon penalty, renewable energy integration ratios, and confidence level on the carbon capture reformation results were analyzed. [Results] The simulation results show that after the optimal carbon capture reformation of thermal power plants, the carbon emission of the power system is significantly reduced, the renewable energy curtailment rate is significantly reduced, and the total operating cost of the system is reduced by 9.44%. [Conclusions] Through the optimal carbon capture reformation of thermal power plants, the output downward regulation space and ramping capability of thermal power plants can be improved, which can promote the accommodation of renewable energy while reducing the carbon emission of the power system, thus enhancing the economic efficiency of system operation.

Key words

flexible ramping demand / carbon capture reformation of thermal power units / fuzzy opportunity constraint / economic dispatch / carbon capture

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WU Kailang, SHAN Lanqing, BO Liming, CHENG Xueting, LIU Xinyuan, CAI Zhi, GUO Hongye, LI Yinxiao. Optimization Methodology for Carbon Capture Reformation Schemes in Thermal Power Plants Considering the Power Flexible Ramping Demand[J]. Electric Power Construction. 0

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Funding

Science and Technology Project of State Grid Corporation of China “Research and Application of Key Technologies in the Market of Ramping Ancillary Services for New Power System”(No. 5108-202315041A-1-1-ZN).