宽负荷下供热机组煤耗实时寻优分析  

Real-time Optimization Analysis of Coal Consumption of Co-generation Units Under Varied Loads

作　　者：王志敏[1] 黄骞 王可轩 李水清[1] WANG Zhimin;HUANG Qian;WANG Kexuan;LI Shuiqing(Key Laboratory of Thermal Science and Power Engineering of Ministry of Education(Department of Energy and Power Engineering,Tsinghua University),Haidian District,Beijing 100084,China)

机构地区：[1]热科学与动力工程教育部重点实验室(清华大学能源与动力工程系),北京市海淀区100084

出　　处：《中国电机工程学报》2023年第4期1347-1358,共12页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51725601);华能集团总部科技项目基础能源科技研究专项(HNKJ20-H50)。

摘　　要：燃煤机组宽负荷清洁高效运行是平稳达成“双碳”目标的关键支撑技术之一。当前,机组运行煤耗仍具较大优化空间,但各变量的优化调整尚依赖于经验,缺乏理论性。首先,该文构建基于反平衡方法的350MW供热机组供电煤耗实时计算模型,同时提出基于该模型的Sodol敏感性分析法以获取机组各重要可控参数的敏感性系数。其次,采用R检测法实时筛选机组稳态数据,并通过三维边界(供热比、负荷、环境温度)约束方式给出机组运行工况划分方式。进一步,采取主要目标法构建以煤耗为主要目标的供热机组多元寻优模型,从而获得机组各工况的历史可达最优煤耗点。最后,计算一台350MW供热机组实时运行数据与模型寻优结果的偏差,并以“碳减排量”作为评价指标,量化该机组低碳运行的碳经济性,验证了该模型实际应用的可靠性。The clean and efficient operation of coal-fired units with varying loads is crucial for achieving the goal of carbon neutrality. Currently, there is still much room for the reduction of the coal consumption of unit operation, but the effective theory to guide operational adjustment is still in need.First, this paper develops a counterbalance model for real-time calculation of the coal consumption in a 350MW co-generation unit, and proposes a Sodol sensitivity analysis method based on this model to obtain the sensitivity coefficient of each important controllable parameter of the unit. Secondly, the R method is used to screen the steady-state data of the unit in real time, and the operating conditions of the unit are divided by the three-dimensional boundary(heat-to-power ratio of the unit,unit load and the ambient temperature) constraint. Furthermore,the constraint method is used to construct a multivariate optimization model of heating units with coal consumption as the main goal, so as to obtain optimal coal consumption and the corresponding state of the unit in the historical conditions close to the present moment. Finally, the deviation between the real-time operation data of a 350MW heating unit and the optimization results of the model is calculated, and the carbon economy of the low-carbon operation of the unit is quantified by using “carbon emission reduction” as the evaluation index,which verifies the reliability of the practical application of the model.

关 键 词：燃煤机组 煤耗寻优 热电联供 敏感性分析 CO_(2)减排 

分 类 号：TM621[电气工程—电力系统及自动化] TK01[动力工程及工程热物理]