简介:ThispaperputsforwardanewfaultdiagnosismodelbasedonPetrinet.Inthisnewfaultdiagnosismethod,anassociatedtreeisfirstdefinedtodescribethelogicaccordingtotheprotectionsandcircuitbreakers.AfterthataPetrinetdiagnosismodelcomesintobeingandtheprecisediagnosisofpowergridelementscanberealizedatthesametime.Thesimulationresultsgiveninthispaperillustratethatthisfaultdiagnosismethodcanmakearapiddiagnosisincomplexfaultsituationandgiveaccurateresultstopowergridfaultdiagnosis.
简介:ConstructionofLing’aoNuclearPowerPlantinGuangdongProvince,thecountry’ssecond-largestnuclearpowerprojectbetween1996-2000,chalkedupnotableprogressthisyear.OnJuly,15,allforeignsuppliersintheprojectweregivenofficialnoticethatbothsidesshouldstarttoimplementthecontracts."Themovemarkedasignificantstepforwardintheproject’sconstruction,"saidZengWenxing,GeneralManagerofLing’aoNuclearPowerCoLtd,setupinSeptember
简介:ThefirstChineseexperimentalwavepowerplant,i.e.,theshoremountcdexperimentalwavepowerplantatthePearlRiverEstuarywassuccessfulintrialpowergenerationonFebruary15,1990.TheplantisonthesouthshoreoftheDawanshanIslandinthePearlRiverEstuary,facingthevastwavingSouthChinaSea.WithadesignedwaveconditionofH1/10=1.5mandT=6.5s,theplannedinstalledcapacityis8kWcomprisingthefirstunitof3kWbrushlessclawpolegeneratorwhichdelivers110VDCcurrentandthesecondunitof5kWbrushlesssinglephasesynchroACgeneratorwhichdelivers220VACcurrent.Atpresent,thefirstunithasbeenputintotrialoperation.
简介:HuanengShidongkouSecondPowerPlant(SSPP)issituatedonthesouthbankoftheYangtzeRivernearthenorthwestskirtsofShanghaiMunicipality.Itisasupercriticalpressurefossil-firedpowerplantof2×600MWcapacity.ThemainequipmentwereimportedfromtheU.S.,Switzerland.France.GermanyandCanada.41monthswerespentsincetheexcavationforfoundations,whichsym-bolizedthebeginningoftheconstruction,tillthefirstsynchronizationofNo.1UnitintothegridonJanuary16,1992.OnApril16,1992,the
简介:Inrecentyears,thepricesofprimaryenergyespeciallycoalcontinuetoincreaserapidly.Thisresultsinasubstantialdeclineofprofitsandmoreoperatingdifficultiesinthedownstreamelectricenterprises.Thelistedcompaniesinbothcoalsupplyandpowerindustrieshavequalityassetsandaretherepresentativesoftheseindustries.Throughtheanalysisofthefinancialandoperationalstatusofthelistedcoalsupplyandpowercompaniessince2007,thereasonsforthebusinessdevelopmentdifficultiesintheelectricpowerindustrywerediscussed.Recommendationswereprovidedincludingimprovingthecoalpricingsystem,increasingthedegreeofbusinessintegrationofthecoalandelectricpowerindustries,andadjustingenergystructure.
简介:1.General1.1Toensurepowergeneratingenterprisestobedispatchedonequal,openandfairbasisandtonormalizereleaseofpowernetworkdispatchinginformationbypowerdispatchingunits,thislmplementationDetailisworkedoutandexecutedbasedonthe’TentativeRegulationsonPowerNetworkDi
简介:Amulti-channelACpowerSupplycontrolerdevelopedrecentlybyuswasintrodueedbrieftyinthispaper.Thiscontrollerisacomputercontrolledmulti-electronic-switchdevice.Thecontrollercontains16independentchannelsinastandardbox(440W×405D×125Hmm).Thereisanelectronicswitchineachchannel,theratedloadpoweris≤1kW.Themainfunctionofthecontrolleristosetthestateofelectronicswitch(ON/OFF)
简介:Toavoidtheinaccurateestimationoftheactiveuser'snumberandthecorrespondingperformancedegradation,anovelPOR-basedUserIdentificationDetector(UID)isproposedfortheCodeDivisionMultipleAccess(CDMA)systems.ThenewdetectoradoptsthePowerofR(POR)techniqueandtheMultipleSignalClassification(MUSIC)method,whichdoesnotrequiretheestimationofactiveusers'number,andobtainslowerfalsealarmprobabilitythanthesubspace-basedUIDinthemultipathchannels.However,fromouranalysis,increasingtheordermdoesnotimprovetheperformance.Therefore,whenmisone,theperformanceofthenewdetectorismaximal.
简介:Withtherapiddevelopmentofeconomy,thescaleofcityhasbecomemoreandmorelarge.Meanwhile,thepopulationalsogrowsrapidly.Althoughthestandardoflivingconditionhasbeenimprovedgreatly,industryanddomesticwastenotonlyinfluencethequalityoflifebypollutingtheenvironment,butalsobecomeasignificantobstaclefactorforeconomicdevelopment.wastepowergenerationorwaste-to-energy(WTE)isusingtheheatwhichisfromgarbageincineratortogenerateelectricity.Thismethodcansolvetheproblemofwasteandgeneratethesocialbenefit,butbyusingthepowerontheinternettogeneratetheeconomybenefit.Inthispaper,combinedthemethodofFAHPandTOPSIS,aquotassystemissetuptoevaluatethesocialandeconomicbenefitsoftheWTEprojectinXiamen.SomeadviceisproposedfortheXiamenWTEproject.