除氧器和给水泵汽轮机汽源与汽轮机抽汽口的协同优化
- 刘*阳
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2020-11-08 09:49:54
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第41卷第3期2014年5月华北电力大学学报JournalofNoahChinaElectricPowerUniversityVo1.41.No.3May,2014doi:10.3969/j.ISSN.1007—2691.2014.03.15除氧器和给水泵汽轮机汽源与汽轮机抽汽口的协同优化付文锋,李飞,王蓝婧(1.华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003;2.华北电力大学控制与计算机工程学院,河北保定071003)摘要:回热系统是全厂热力系统的核心,它对机组和电厂的热经济性起着决定性的作用。优化回热系统是提高火电机组热经济性的重要手段之一。以汽轮机通流级结构为基础,通过级数组合寻优的方式建立了除氧器、小机汽源和汽轮机抽汽口协同优化模型。以某600MW汽轮机组为例,验证了该模型的准确性;计算分析了除氧器和小汽轮机汽源对机组热经济性的影响,得到了除氧器和小机汽源在不同位置组合下的多种回热系统优化方案。结果表明,当未对汽轮机抽汽口优化时,仅优化除氧器和小机汽源,可使机组标准煤耗率降低约0.78069g/kW·h;当对除氧器、小机汽源和汽轮机抽汽口协同优化时,可使机组标准煤耗率降低约0.93342s/kW·h。该方法对回热系统优化设计具有一定参考价值。关键词:回热系统;协同优化;除氧器;小机中图分类号:TK284.1文献标识码:A文章编号:1007—2691(2014)O3—0094—07CooperativeoptimizationonturbineextractionportandsourcesofdeaeratorandfeedpumpturbineFUWenfeng,LIFei,WANGLanjing(1.MinistryofEducationKeyLaboratoryofConditionMonitoringandControlforPowerPlantEquipment,NorthChinaElectricPowerUniversity,Baoding071003,China;2.SchoolofControlandComputerEngineering,NorthChinaElectricPowerUniversity,Baoding071003,China)Abstract:Regenerativeheatingsystemisthecoreofthewholeplantthermodynamicsystem,anditplaysadecisiveroleforthethermaleconomyoftheunitandplant.Soit’Sanimportantmethodtoimprovetheeconomyofthermalpowerunitbyoptimizingthestructureofregenerativeheatingsystem.Acollaborativeoptimizationmodelaboutdeaera—tor,feedpumpturbineandturbineextractionportisestablished,basedontheflowstagesstructureofsteamturbine,bywhichthebestconnectionmodeoftheoptimumextractionopening,deaeratorandfeedpumpturbineisdetermined.Theaccuracyofthemodelisvalidatedbytakinga600MWsteamturbineforexample.Theinfluencesofdeaeratorandfeedpumpturbineontheunitthermaleconomyarecomputationalanalyzed,andavarietyofregenerativesystemoptimi—zationprogramshasbeenobtainedaboutthelocationsofdeaeratorandfeedpumpturbineunderdifferentlocationcom—binations.Theresultsshowthatwhendeaeratorandfeedpumpturbineareoptimizedonly,thestandardcoalconsump—tionratecanbedecreased0.78069g/kW·h;theunitstandardcoalconsumptionratedecreased0.93342s/kW·hwhendeaerator,feedpumpturbineandthesteamextractionope
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