配置储热罐后热电联产机组运行优化  

Operation optimization of cogeneration unit equipped with heat accumulator

作　　者：杨利 刘永林[1,2] 房伟 余小兵 吕凯[1,2] 刘明 YANG Li;LIU Yonglin;FANG Wei;YU Xiaobing;LYU Kai;LIU Ming(Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China;Xi'an TPRI Energy Conservation Technology Co.,Ltd.,Xi'an 710054,China;Yantai Power Plant ofHuaneng Shandong Power Generation Co.,Ltd.,Yantai 264002,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiongtong University Xi'an 710049,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]西安西热节能技术有限公司,陕西西安710054 [3]华能山东发电有限公司烟台发电厂,山东烟台264002 [4]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《热力发电》2020年第4期70-76,共7页Thermal Power Generation

基　　金：国家重点研发计划项目(2017YFB0902100)。

摘　　要：储热罐作为一种蓄能技术可在一定程度上实现热电联产机组热电解耦,提高热电联产机组深度调峰能力。针对目前热电联产机组配置储热罐后的运行优化问题,本文采用Ebsilon软件搭建热电联产机组运行优化分析模型,对某电厂亚临界2×330 MW热电联产机组配置储热罐后运行方式及优化效果进行分析计算。结果表明,配置储热罐后,在单台机组对外供热负荷250 MW时,调峰容量最小提高了额定容量的15.2%,最大提高了额定容量的24.2%。同时,为提高热电联产机组的运行经济性,建议在热电负荷一定时,采取电负荷平均分配、热负荷不均匀分配的运行方式。在此基础上,当该电厂3、4号机组热电负荷处于供需平衡时,运行优化后机组总体热耗率可降低76.1 kJ/(kW·h);当热电负荷处于供需不平衡时,运行优化后机组总体热耗率可降低12.9 kJ/(kW·h);整个采暖季总节煤量为1 618.2 t,总经济收益为129.5万元。该研究结果可为热电联产机组配置储热罐后的安全经济运行提供指导。As an energy storage technology,thermal storage device can solve the power-heat decoupling problem and enhance the deep load peak regulation capacity of cogeneration units.To solve the problem of insufficient research on operation optimization of cogeneration units equipped with heat accumulator,the Ebsilon software is used in this paper to establish the operation optimization analysis model of cogeneration units,and analyze the operation mode and optimization effect of a subcritical 2 ×330 MW cogeneration units equipped with heat accumulator.The results show that,after the heat accumulator is installed,when the external heating load of a single unit is 250 MW,the peak load capacity is increased by 15.2% at the minimum and 24.2% at the maximum.At the same time,in order to improve the operational economy of the cogeneration unit,it is recommended to adopt an operation mode in which the electric load is evenly distributed and the electric load is unevenly distributed.On this basis,when the thermal power load of the No.3 and No.4 units of the power plant is in balance between supply and demand,the overall heat consumption rate after operation optimization can be reduced by 76.1 kJ(kW·h),when the thermal power load is in imbalance between supply and demand,the overall heat consumption rate after operation optimization can be reduced by 12.9 kJ(kW·h),and the coal saving amount is 1618.2 t during the whole heating season,and the total economic income is 1.295 million yuan.The results can provide guidance for safe and economic operation of the cogeneration units equipped with heat accumulator.

关 键 词：热电联产机组 储热罐 深度调峰 运行优化 热电解耦 热电负荷分配方式 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]