城市燃气短期周期负荷预测的时序模型

Pd,1[],..,1999;(3)2WeaverCS,TurnerSH.Dualfuelnaturalgas/dieselengines:technology,performanceandemissions.SAEPaperNo.9405483,./.,2001;(2)4GebertK,BeckNJ.Strategiestoimprovecombustionandemissioncharacteristicsofdualfuelpilotignitednaturalgasengines.SAEPaperNo.9717125,..,1998;(2)6DouvilleB,OuelletteP,TouchetteA.Performanceandemissionsofatwostrokeenginesfueledusinghighpressuredirectinjectionofnaturalgas.SAEPaperNo.9811607MeyersDP,BournGD,HedrickJC,KubeshJT.EvaluationofsixnaturalgascombustionsystemsforLNGlocomotiveapplications.SAEPaperNo.9729678.B.,1997;(1)9CorboP,GambinoM.Methanededicatedcatalystsforheavydutynaturalgasengines.SAEPaper961087(2001-09-01)*,,,,1962;:(150090)204645:[phone]E-mail:[e-mail]焦文玲*廉乐明()崔建华()严铭卿().城市燃气短期周期负荷预测的时序模型.天然气工业,2002;22(1):92~94中国天然气工业将把局限在一个城市内的独立的燃气管网带入跨区域的全国联网的甚至与国际天然气管网相连接的天然气网络大系统,这就要求我国目前的燃气系统在功能上要有实质的进步,包括系统的信息采集与处理,建立运行在城市间的天然气网络优化调度系统,季节调峰和事故应急功能的地下储气库等所有这些功能都离不开对燃气负荷的研究,时序模型的研究对于城市燃气负荷预测有重要的意义文章对短周期负荷的数学模型进行了深入的研究,提出了用Fourier级数描述的数学模型,并给出了判断隐含周期项数和计算模型参数的方法城市燃气负荷短期数学模型傅立叶分析,,,,,,,{xt},{x(t),t=0,1,2},,:9220021x(t)=f(t)+p(t)+(t)(1):f(t),x(t);p(t),x(t);(t),x(t),(t),(t),f(t)p(t),x(t),{xt},f(t)C,(1):x(t)=C+p(t)+(t)(2),!1∀,,,,11,Fourier,:pt=#pi=1icos2Tit+!isin2Tit(3):Ti{xt}i,N{xt}(t=1,2,,N),:Ti=N,N2,N3,,Npmax,pmax=N/2,(N)(N-1)/2(N),,,∃%(3),Tip,(3),i!i,i!i:Q=#Nt=1x-#pi=1icos2Tit+!isin2Tit2(4),{Ti}p,{Ti}(3)^i^!i,i!i(4)i!i!2∀:#Nt=1xtcos2Tjt=#pi=1^iaij+#pi=1^!ibij(j=1,,p)(5-1)#Nt=1xtsin2Tjt=#pi=1^ibij+#pi=1^!icij(j=1,,p)(5-2):aij=#Nt=1cos2Titcos2Tjtbij=#Nt=1sin2Titcos2Tjtcij=#Nt=1sin2Titsin2Tjt,Ti=N/pi,piN/2(ppmax):aij=cij=0(i&j)bij=0(i,j)aii=cii=N/2(i)(5)i!i:^i=2N#Nt=1xtcos2Tit^!i=2N#Nt=1xtsin2Tit(i=1,2,)(6)i!ii!i,,,,(3)N,pmax,,1684893221N=48,:Ti=48,482,483,484,,4824N=48,1330.3∋108,i=2,4,6,810(2),1%,Ti=241,242,243,,24i,i=3~51Ti1234567891011121314(108)330.1142.8329.4226.6330.2316.7330.3328.5330.2324.5329.4327.4327.8326.42(6)i!i,,,2pt=#5i=1icos2Tit+!isin2Tit2(104m3/h)12345-2.4074-0.9590-0.02030.21280.3168!-1.5369-1.6049-0.4736-0.0670.1200,33{xi}4,(2)(t),,,,41)Fourier;2);3),1,..:,20002,..:,19883..:,1999(2001-07-10)9420021arepresentedinthepaper,includingtheutilizationofsomereturntubes,theautomaticcontrolofexcessairandtheenlargementofsurfaceareaofthefiretubeconvectionsection,etc.Specially,throughsettingupthefinnedtubeatthefiretubeconvectionsection,itispossibletomakethewaterjacketheaterget85%thermalefficiencyaslomgastheheattransferareaisenoughandthedesigniscorrect.SUBJECTHEADINGS:Oilandgasfield,Heatingequipment,Design,Empiricalanalysis,ReformationGaryH.Palmer(vicepresident,registeredprofessionalengineer),graduatedwiththeB.Sc.engineeringdegreefromtheUniversityofAlbertain1959.NowheisinchargeofsupervisingengineeringforMaloneyIndustriesInc.,beingamemberoftheCanadianNaturalGasProcessingAssociation.Tel:[phone]Fax:[phone]EFFECTOFSURFACTANTONHYDRATEFORMATIONANDITSAPPLIEDPROSPECTSXuYongjun,YeGuoxing,YangXiaoxiandDingJing(SouthChinaUniversityofTechnology).NATUR.GASIND.v.22,no.1,pp.85~87,1/25/2002.(ISSN1000-0976;InChinese)ABSTRACT:Thenaturalgashydrate,occurringtoseaflowandpolartundra,isofthepropertiesashighenergydensity,widedistribution,grandsize,shallowburialandgoodphysiochemicalreservoirformationconditions,etc.,andisregardedasthesubstituteresourcesoffossilfuelshavinggreatpotentialitiesinthe21stcentury,whichhasbroughtaboutallthenations(attentionintheworld.Onthebasisofsummarizingtheresearchachievementsofeverycountryinrecentyears,theeffectofsurfactantongashydrateformationisexpoundedinthepaper.Ontheonehandthehydrateformationinoil&gaspipelinemaybeinhibitedwiththesurfactant,andontheotherhandthehydrategrowthratemayberaisedbyuseofit.Thereforeitpossessesavastrangeofappliedprospectsinmanydomains,asenvironmentalprotection,oilandgasindustry,chemicalindustryandbiology,etc.Finally,inlightoftheexistingcircumstancesinChina,theresearchtrendofhydrateinthefutureisalsoproposedinthepaper.SUBJECTHEADINGS:Surfactant,Naturalgas,Hydrate,ApplicationXuYongjun,,bornin1973,isapostgraduatestudyingforhisdoctorateintheChemicalEngineeringCollegeoftheSouthChinaUniversityofTechnology.Add:Guangzhou,Guangdong(510640),ChinaTel:[phone]or87113500NATURALGASVEHICLEENGINETECHNIQUEANDITSAPPLICATIONSongJun,HuangZhen,ZhangWugaoandZhouXiaoping(ShanghaiJiaotongUniversity).NATUR.GASIND.v.22,no.1,pp.88~92,1/25/2002.(ISSN1000-0976;InChinese)ABSTRACT:TheutilizationofnaturalgasvehicleshasbeentakenasanimportantmeasureofcontrollingatmosphericpollutioninmanybigcitiesinChina.The∃WesttoEastNaturalGasTranssion%project,whichisbeingcarriedoutatpresentinChina,willgreatlypromotetheutilizationofnaturalgasvehiclesineachbig/mediumcitysittingalongthegaspipeline.Thecorefactorofcontrollingnaturalgasvehiclepropertiesisthegasenginetechnologywhichmayberelevantlyadoptedfordifferentexhauststandards.Inthepaper,themechanicalproperties,techniquesandtheirdevelopingcircumstancesofdifferentfuelsupplysystemsofthedomesticandforeigngasenginesareemphaticallyanalyzed;thenthecontrolsystemsandworkperformancesofthesparkfiringgasengines,includinggasolin