电力科技与环保2026，Vol.42Issue(4)：582-590,9.DOI:10.19944/j.eptep.1674-8069.2026.04.007
多台超超临界机组负荷分配及其综合能效分析
Comprehensive energy efficiency analysis of multiple ultra-supercritical units and load distribution strategy
摘要
Abstract
[Objective]The plant-level electric load distribution mode of coal-fired power plant affects its economy.In order to reveal the difference of energy efficiency characteristics of multiple ultra-supercritical units in a power plant and the influence of electric load distribution on the economy of the whole plant,the optimal electric load distribution strategy is proposed to realize the energy saving and efficiency increase of the whole plant operation.[Methods]In this paper,the 2×1 000 MW ultra-supercritical single-reheat unit in the first phase and the 2×1 000 MW ultra-supercritical double-reheat unit in the second phase of a power plant are taken as the object.Based on the Ebsilon software platform,the thermal system models of the first and second phase units are established.The variation of coal consumption and heat consumption rate of the first and second phase units is simulated under the condition of pure condensation with 5%step size and 30%THA~100%THA,a total of 15 load points.[Results]The results show that when the electric load is between 300 MW and 1 000 MW,the coal consumption rate of the first stage unit is 277.1~310.9 g/(kW·h),and the maximum difference is 33.8 g/(kW·h).The coal consumption rate of the second phase unit is 266.8~297.6 g/(kW·h),and the maximum difference is 30.8 g/(kW·h).At low load,the influence of unit electric load change on coal consumption rate is more significant.The coal consumption rate of the first-stage unit decreases more under low load;under high load,the economy of the second-stage unit is better.Under the total load of 2 200 MW,the heat consumption rate of the first-stage multi-load scheme is 30.26 kJ/(kW·h)lower than that of the second-stage.[Conclusion]The load distribution of the unit needs to be dynamically optimized.When the total load is low,it is preferentially borne by the first-stage unit.As the total load increases,the load ratio of the second-stage unit needs to be gradually increased.The high-load period is dominated by the second-stage unit,which can significantly reduce the coal consumption of the whole plant.关键词
燃煤机组/负荷分配/能效分析/热力系统建模/超超临界机组Key words
coal-fired power unit/economic analysis/thermodynamic system modeling/ultra-supercritical units分类
能源科技引用本文复制引用
张海峰,刘庆同,陈国庆,殷戈,高行龙,周小明..多台超超临界机组负荷分配及其综合能效分析[J].电力科技与环保,2026,42(4):582-590,9.基金项目
低碳智能燃煤发电与超净排放全国重点实验室开放课题(D2023FK092) （D2023FK092）
江苏省特种设备安全监督检验研究院项目(KJ(Y)202409) （KJ(Y）
