考虑电力系统灵活爬坡需求的火电厂碳捕集改造方案优化方法

邬凯浪; 单兰晴; 薄利明; 程雪婷; 刘新元; 蔡帜; 郭鸿业; 李寅晓

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电力建设 ›› 0

考虑电力系统灵活爬坡需求的火电厂碳捕集改造方案优化方法

邬凯浪¹, 单兰晴¹, 薄利明², 程雪婷², 刘新元², 蔡帜³, 郭鸿业¹, 李寅晓¹

作者信息 +

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

Author information +

文章历史 +

摘要

【目的】在高比例可再生能源接入背景下,为满足电力系统灵活性和低碳需求,提出了考虑电力系统灵活爬坡需求的火电厂碳捕集改造方案优化方法。【方法】首先,针对大规模风电和光伏接入引发的电力系统爬坡需求攀升现象,建立电力系统灵活性需求计算模型。其次,建立考虑碳捕集改造的火电机组灵活运行模型并量化其灵活爬坡供应能力。然后,考虑负荷、新能源的不确定性,引入灵活爬坡需求约束,建立基于模糊机会约束的火电厂碳捕集改造规划模型,对火电机组碳捕集改造规划问题和火电机组运行优化问题进行联合求解,得到火电最优碳捕集改造方案。最后,结合算例验证了碳捕集改造方案优化方法的有效性,并分析不同单位碳排放惩罚成本、新能源接入比例及置信水平对碳捕集改造方案的影响。【结果】仿真结果表明,在对火电机组进行最优碳捕集改造之后,电力系统的碳排放显著降低,可再生能源弃电率显著减少,系统的总运行成本降低了9.44%。【结论】通过对火电机组进行最优碳捕集改造,能够提升火电机组的出力下调空间和爬坡能力,在降低电力系统碳排放的同时促进可再生能源的消纳,提升系统运行的经济性。

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.

导出引用

邬凯浪, 单兰晴, 薄利明, 程雪婷, 刘新元, 蔡帜, 郭鸿业, 李寅晓. 考虑电力系统灵活爬坡需求的火电厂碳捕集改造方案优化方法[J]. 电力建设. 0

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

中图分类号： TM74

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