中国电力2026，Vol.59Issue(9)：83-95,13.DOI:10.11930/j.issn.1004-9649.202607046
灵活煤电热力系统重构与发展探讨
Reconstruction and development of thermodynamic systems for flexible coal-fired power
摘要
Abstract
Against the backdrop of the"dual-carbon"goals and the new power systems,coal-fired power generation is accelerating its transition toward deep and flexible peak-shaving.However,when coal-fired units operate at low-load conditions,prominent challenges including substantial degradation in safety and reliability as well as sharp growth in coal consumption remain to be addressed.To this end,this study systematically elaborates the theoretical methodology of thermodynamic system reconstruction,analyzes its influen-ces on boiler combustion stability,hydrodynamic character-istics,heating-surface metal safety,and emission control under low-load conditions,and discusses its improvement effects on heat consumption at low loads.By establishing a correlation mechanism of"key performance-characteristic parameters-key-component structures",the proposed theoretical methodology employs modular thermodynamic system topology control and flow-field reconstruction to raise characteristic parameters such as feed-water temperature,main-steam pressure,and steam flow-field under low-load operating conditions to levels close to their rated values.Research on a 1 000 MW ultra-supercritical unit shows that,at 30%～50%rated load range,this technology can increase feed-water temperature,the flue gas temperature for selective catalytic reduction(SCR)denitrification and hot air temperature by approximately 65 ℃,44 ℃and 30 ℃,res-pectively,significantly improving key performance indicators including low-load combustion stability,hydrodynamic and heating-surface safety,and SCR reliability.Meanwhile,it reduces the net coal consumption for power supply by 8～27 g/(kW·h),offsetting about 55%of the coal-consumption increment of conventional units at low-load operation.Conducting research on turbine ultra-low load operation technology based on this theory represents an important development direction for flexible coal-fired power thermodynamic systems.关键词
新一代煤电/灵活性/热力系统重构/深度节能/低负荷安全/微出力Key words
next-generation coal power/flexibility/reconstruction of thermodynamic systems/deep energy saving/low-load safety/ultra-low load operation引用本文复制引用
王卫良,吕俊复,姚洪,张含智,柯希玮..灵活煤电热力系统重构与发展探讨[J].中国电力,2026,59(9):83-95,13.基金项目
国家重点研发计划资助项目(2022YFB4100805) （2022YFB4100805）
广东省自然科学基金资助项目(2025A1515011620) （2025A1515011620）
珠海市产学研合作项目(2220004003010). This work is supported by National Key Research and Development Program Project(No.2022YFB4100805),Guangdong Basic and Applied Basic Research Foundation Project(No.2025A1515011620),and Zhuhai Industry-University-Research Cooperation Project(No.2220004003010). （2220004003010）
