基于等效电法的钢铁企业蒸汽系统多目标运行优化策略

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1、第67卷第9期化工学报Vol.67No.92016年9月CIESCJournalSeptember2016DOI：10.11949/j.issn.0438-1157.20151584基于等效电法的钢铁企业蒸汽系统多目标运行优化策略陈骏，周伟国，王海，李苏（同济大学机械与能源工程学院，上海200092）摘要：针对钢铁企业蒸汽系统汽源设备多、能源品种多的特点，以某大型钢铁企业实际运行的蒸汽系统为背景，运用等效电方法对蒸汽系统的能量转换作出科学分析，采用数学规划方法，建立多目标的混合整数非线性规划模型（MINLP）。采用分步优化方法，先以蒸汽系统小时能源总成本最低为目标，将得到的结果乘以松弛

2、系数建立成本约束并以㶲效率最高为目标，利用LINGO软件求得多目标-约束优化模型的全局最优解，再通过改变松弛系数得到一组Pareto前沿。最后与单目标优化和多目标遗传算法结果相比较，证明分步优化方法所得的结果是可行的综合最优结果，能够实现低成本和高㶲效率的双目标，并为生产调度提供依据。关键词：蒸汽系统；等效电方法；多目标优化；数学模型；优化；㶲中图分类号：TQ028.8文献标志码：A文章编号：0438—1157（2016）09—3804—08Multi-objectiveoptimalstrategyforsteampowersysteminsteelindustrybasedonel

3、ectricityequivalentcalculationCHENJun,ZHOUWeiguo,WANGHai,LISu(SchoolofMechanicalEngineering,TongjiUniversity,Shanghai200092,China)Abstract:Thesteampowersysteminsteelindustriesisfeaturedbyavarietyofenergyandvariousenergyproducers.Inthispaper,amethodtoconvertenergyintoelectricityequivalentisintrod

4、ucedtoanalyzetheefficiencyofenergyconversioninthesystem,andmathematicalprogrammingandoptimizationareemployedtoimproveenergymanagementbasedonthebackgroundofsteampowersysteminalargeironandsteelcompany.Withtheestablishmentofmixedintegernonlinearprogrammingmodelwhichismulti-objective,theglobaloptima

5、lsolutionwillbeachievedbysolvethemulti-objective-constrainedmodelbyLINGOstepbysteponconditionthattheobjectives,theminimumcostofenergyhourlyandthemaximumexergyefficiency,andtheconstraintsincludingthecapacityofpowerplants,energydemandandoperatingcostareset.Paretofrontistobeachievedbysolvingtheobje

6、ctivefunction-themaximumexergyefficiency-withcostconstraintbytheminimumcostofenergyhourlymultiplyinganover-relaxationwhichislittlebiggerthan1.Rationality,feasibilityandefficiencyofultimateoptimizationsolutionbystepwisemulti-objectiveoptimizationistobedemonstratedincomparisonwithsolutionsbysingle

7、-objectiveoptimizationandmulti-objectivegeneticalgorithm.Thescheduleofeffectiveoperationatlowcostofsteampowersystemistobewell-foundedintheoryinaccordancewiththeoptimalsolution.Keywords:steamsystem;electricityequivalentcalcul