简介:Thispapertriestodeterminetheeconomicaltypeofreinforcedconcretechimneystructurebasedonthesameeffectiveheightofchimney.Thesimulatedexperimentsofwindtunnelareperformedforthestudy,whichcomparemulti-tubechimneywithsingletubechimneybasedonthesamebuoyancyfluxofplume.Accordingtothecomparisonamongtheexperimentresultsandthepreviousstudyofplumerise,thepaperdefinessomefinalplumerisemodels.Finally,thepapergivesthecost-benefitanalysisaftermakingcostestimationfordifferenttypesofchimneystructureandrecommendstheeconomicalandreasonabletypeofchimneystructureinlightofthesameenvironmentalbenefits.
简介:Reliableconnectionofturbinegeneratorsincomplexmainwiringstructurestothepowergridthroughapluralityofswitchesisanewkeyproblem,referredtoasmultipointautomaticsynchronization(MPAS),inautomaticcontrolsystems(ACS).Inthispaper,differentmethodsofvoltage-frequencyandphase-differencecontrolareanalyzed,andacontrolmethodologybasedonactivefrequencytracking(AFT)ispresented.Throughtheestablishmentofthemulti-pointautomaticsynchronizationmodelandtheanalysisofthegovernortransferfunctionwiththiscontrolmethod,theimportantcontrolparametersandautomaticprocesscontrolsequencearesummarized.Thecorrectnessandeffectivenessofthedesignedmethodologyareinspectedthroughon-sitetesting,andtheimportanceofthefunctionandselectionofparametersarealsoexplored.
简介:Attheendoflastyear,theeditorsfromPowerandElectricalEngineersinterviewedZhouXiaoxinon"FundamentalResearchonEnhancingOperationReliabilityforLarge-ScaleInterconnectedPowerGrids",aprojectof"973Program".Mr.Zhou,thechiefengineerofChinaElectricPowerResearchInstitute(CEPRI)andanacademicianofChineseAcademyofSciences,isthechiefscientistinchargeofthisresearchproject.