简介：NorthwestElectricPowerDesignInstitute(NWEPDI)wasestablishedin1956.Theinstituteundertakestheengineeringexploration,surveyanddesignofthermalelectricpowerplant,conventionalislandofnuclearpowerplant,powertransmissionandsubstationprojects,designofthe1stand2ndclasspressurevessels,electricpowersystemplanning,environmentalprotectionengineeringmonitoring,assessmentanddesign,variousindustrialandcivilarchitecturaldesignandthescicntificresearchandtechnicaldevelopmenttasksofcorrespondingspecialities.Theinstituteis

简介：ObjectivesandbenefitsoftheprojectFloodcontrolTheThreeGorgesProject(TGP)isakeyprojecttotheharnessinganddevelopmentoftheYangtzeRiver.ThedamsiteislocatedatSandouping

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简介：1.IntroductionNorthwest-andNorth-Chinaarerichincoalresources,buttheclimateoftheseregionsissemi-aridandshortofwaterresources.Forthisreason,therecirculatingwatersupplysystemsarepre-dominantlyutilizedinfossilpowerplants.Thenaturaldraftcoolingtowersaregenerallyselectedfortheserecirculatingsystems.Ac-cordingtostatisticsabout50%ofthethermalpowerplantsinChinaareequippedwithnaturaldraftcoolingtowers.Thecoolingtowerswithcast-in-placereinforcedconcretehyperboloidalshellarepreferablyadoptedinChina,becauseofthenot-too-severeclimateinwinter,thelowearthquakeintensitiesand

简介：Thefirst±500kVproject(bipolar),GezhoubatoShanghaiHVDCproject,hasbeensetupandputintooperationin1990inChina.TheHVDClineis1000kmlong,interconnectingthecentralandeastelectricpowernetworksofChina.Itisnecessarytomeasuretheextensiveearthresistivityof

简介：AccordingaleadingpersonofChinaInstituteofAtomicEnergy(CIAE),thefirstexperimentalfastneutronreactorunderconstructionwiththermalpowerof65MWisproceedingsmoothly,andtheconstructiondesignhasbeenfinishedcompletely.ItisexpectedthatthereactorwillbefinishedandgocriticalinSeptember2009,andgenerateelectricityontrialinSeptember2010.

简介：Inourearlierpaper,powersystemstabilizers(PSSs)aredesignedforanine-machinesystem,anewpole-placementtech-niqueisdevelopedforthedesign,andparticipationfactorsareusedtodecidehowmanystabilizersarerequiredandwheretheyshallbe.Eachmachinebeingrepresentedbyalow-orderlinearmodel,thereissomereservationoftheresults.Inthispaper,extensivetransientsimulationsareperformedandeachmachineisrepresentedbyahigh-ordernonlinearmodel.Coherentgroupsarefound.Aweightedspeeddeviationindex(SDI)isdefinedtofindoutthemostunstablemachinesinthesystem.PSSsaredesignedafterthedecisionsofPSSnumberandsites.Transientsimulationsarecarriedoutagainfortheclosed-loopsystem.Asystemstabilityindex(SSI)isusedtoevaluatethestabilityoftheclosed-loopsystem.ItisfoundthatthreePSSsaresufficienttoensurethestabilityofthenine-machinesystem.

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简介：Thepaperpresentsarenovationofthermalsystemdesignofapowerandheatcogenerationdevicebyutilizingthe"ProcessEnergyIntegrationMethod".Thenewalternativeobtainsprominentenergysavingresult.