基于SCADA系統(tǒng)的天然氣管道瞬態(tài)仿真及負荷預測.pdf

1、天津大學碩士學位論文基于SCADA系統(tǒng)的天然氣管道瞬態(tài)仿真及負荷預測姓名：劉明亮申請學位級別：碩士專業(yè)：制冷及低溫工程指導教師：楊昭20080501ABSTRACT。IhetransientsimuIationsystemisoneofthemostimportantandcomplicated印plicationsintheSCADAsystemofgaspjpelineAndthetfansien￡leakagedetectioni

2、samajorfunctionofthetransiemsimulationPredictionofnaturalgasloadanditssyStemarearequiredsupplement，whiletheprogramsalmosthavebeenbroughtf幻mabroadTherefore，itisapressingproblemtoresearchonanalysjsofsimulationofgaSpipeline

3、andnaturalgasdemandforecastinChinaThemaincontentsofmispaperarefoIIows：Calculationsoffrictionresistanceoflowpressureandhi曲andmediumpressureweretransferredforconfonnityinsystemofunitThedefectofthetraditionalhydlIauliccaJcu

4、lationwasindjcated，andsuggestionwasgivenBasedonthe乏hr。econserVationfunctionsinhydromechanicsandtheStateequation，thesteadyandthetransientmodelsofnaturalgashavebeenestablishedTbbasisof6nitedifferencemethod，theresolVingmeth

5、odhasbeengotThengasnetworksimulationsoRwarewasprogrammedaccordinglyThrou曲practicalapplicationinnaturalgasnet、Ⅳorkofh培hpressurenetworkinTianjin，thestimuIationresuIts，whichvaIidatemedependabiljtyofthismodelanditsresolvingm

6、ethod，have054％and216％e玎ordi行’erentiatingfromactualdataofpressureandqualityseparatelyThetransientleakagemodeJhasbeen蠡am《矗onthebasisofthetfansientsifnulationTherelation，bet、VeenLeak10ca“onandpipelineoutletpressure，hasbeenr

7、esearchedE：xperimentswerealsocarriedoutaccordingtodifferentleakageTheresultsshowthatleakageandoutletpressurearemoreimpo砌ntparameterscomparedtothecoe幣cientoffrictionalresistanceandpipelinediameterThepropertiesandinfluenci

8、ngfactorsofcitygaswereanalyzedandcIassinedThespeciaIfactorsofinfluencingshorttemIoadwererangedhoJidaysandaccident，andsolutionshavebeenproposedTheimprovementwasdonetothemodelofdynamicequal一dimensional伊ay—numberpro伊essivec

9、ompIement，whichintroducesparameterE，economicgrowthAccordingt0dataofTianjinfrom19952005，thecitygasloadsofEwarehasbeencompletedwitherrorsrangefrom10％t0—3％ThenthesystemofgasloadforecastwasinvestigatedFinaJly，baSedonthe把ansi