热电联产机组热电解耦改造方案的调峰特性及能耗分析  

Peak Shaving Characteristics and Energy Consumption Analysis of the Thermoelectric-decoupling Retrofit Scheme for Cogeneration Units

作　　者：张红昌 薛小军 徐钢[1] 赵长存 ZHANG Hongchang;XUE Xiaojun;XU Gang;ZHAO Changcun(School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;State Grid Hebei Electric Power Co.,Ltd.,Electric Power Research Institute,Shijiazhuang 050035,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]国网河北省电力有限公司电力科学研究院,石家庄050035

出　　处：《动力工程学报》2023年第10期1382-1390,共9页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金创新研究群体资助项目(51821004);国家自然科学基金重大项目(52090064)。

摘　　要：以某电厂330 MW抽汽凝汽式汽轮发电机组为研究对象,计算分析了低压缸切缸、高低压旁路改造、增设储热罐、电锅炉及吸收式热泵5种改造方案对供热机组安全运行可行域及热电解耦能力的影响规律,并采用EBSILON建立案例机组的热力学模型,模拟了各改造方案的能耗状况。结果表明:5种改造方案均可使热电联产机组的安全运行可行域增大,其中两级旁路改造方案的机组最大供热能力增幅最大;除低压缸切缸改造外,其余4种方案的热电解耦能力均有不同程度的提高,其中电锅炉改造方案在电热负荷较低时的热电解耦能力最强;在相同条件下,各改造方案的机组标准煤耗量由高到低分别为电锅炉、两级旁路、低压缸切缸、储热罐和吸收式热泵。Taking the 330 MW extraction and condensing steam turbine generator set of a power plant as the research object,the effects of five retrofit schemes,including low-pressure cylinder cutting,high-pressure and low-pressure bypass modification,adding heat storage tanks,electric boilers and absorption heat pumps,on the safe operation feasibility range and thermoelectric decoupling ability of heating units were calculated and analyzed.The thermodynamic model of the case unit was established by EBSILON,and the energy consumption of each retrofit scheme was simulated and calculated.Results show that the five retrofit schemes can expand the safe operation feasible region of the cogeneration unit,among them,the maximum heating capacity increase of the unit is the largest under the two-stage bypass transformation plan.Except for the low-pressure cylinder cutting retrofit,the thermoelectric decoupling ability has been improved to varying degrees under the other four schemes,with the electric boiler renovation scheme having the strongest thermoelectric decoupling ability when the electric heating load is low.Under the same conditions,the coal consumption of each retrofit scheme from high to low is electric boiler,two-stage bypass,low-pressure cylinder cutting cylinder,heat storage tank and absorption heat pumps.

关 键 词：热电联产 供热改造 调峰 能耗 新能源消纳 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]