大型汽轮机组深度调峰时抽汽供热的经济性分析  

Economical Analysis for a Large-sized Unit of Steam Extraction under Deep Regulating Load

作　　者：高宽 鲍文龙 丁阳俊 GAO Kuan;BAO Wen-long;DING Yang-jun(Hangzhou Yineng Electric Technology Co.Ltd.,Hangzhou,China,Post Code:310014;State Grid Zhejiang Electric Power Research Institute,Hangzhou,China,Post Code:310014)

机构地区：[1]杭州意能电力技术有限公司,浙江杭州310014 [2]国网浙江省电力有限公司电力科学研究院,浙江杭州310014

出　　处：《热能动力工程》2020年第9期16-21,共6页Journal of Engineering for Thermal Energy and Power

摘　　要：计算了某台660 MW超超临界再热机组深度调峰至40%额定负荷时抽汽供热的经济性指标,通过变工况得出了纯凝发电工况,用于对比分析;从主再热汽温和缸效两方面分析抽汽供热对机组深度调峰的影响;给出两种热负荷分配方案。计算表明两种方案的热耗率是一致的,但是通过热负荷的分配,可以进一步挖掘机组降低负荷的能力。The paper is about economical analysis for a 660MW Ultra-Supercritical Reheating Unit.The unit was operating at 40%load under extraction steam condition.A variable condition calculation method for turbines was introduced to study the unit under no extraction steam condition for a comparative analysis.Also,the effect of extraction steam condition at low loads on main reheat temperature and cylinder efficiency was analyzed.And finally,two schemes were given of the thermal load distribution for two units.There is no much difference between the total heat consumption rate in the schemes.There is room for further load reduction in the scheme of distributing heat load to the unit at lower electrical load.

关 键 词：汽轮机 变工况计算 深度调峰 抽汽 经济性分析 

分 类 号：TK172[动力工程及工程热物理—热能工程]