简介：Xi’anThermalPowerResearchInstitute(TPRI)isoneoftheresearchorganizationsdirectlyundertheMinistryofEnergy.Itsresponsibilityistosolvekeytechnicalproblemsoccurredinthermalpowerplants,andtoundertaketherelatedresearchanddevelopmentprojects.Chinareliesheavilyoncoatforenergygeneration.Theto-

简介：ThePowerSystemDepartment(PSD)isthelargestpro-fessionalresearchanddevelopmentorganizationoncomprehensivepowersystemplanning,engineeringandoperationoftheElectricPowerResearchInstitute(EPRI)oftheMinistryofEnergy.TheactiveRD&EofPSDarecomposedofthefollowingfivemajorareas.Powersystemanalysis,softwaredevelopment&application,automaticdevices,DCtransmission,generation&transmissioncommission,modernlaboratoriesforRD&Eandelectricalappara-

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简介：TheresearchinPowerElectronicsandDivesatTheHongKongPolytechnicUniversityhasbeenundertakingformanyyears.Recently,aPowerElectronicsResearchCentre(PERC)hasbeendevelopedthatiscontributedtowardstheresearchanddevelopmentinthearea.Itencompassesthehighfrequencypowersupplies,chaosandbifurcation,soft-switchingpowerconverters,electricalmachines,highprecisionmotioncontrol,tractionandtrafficcontrol,alternativeenergyandelectricalbuildingservices.

简介：Distributedgeneration(DG)willchangecharacteristicsofpowerflowandfaultsoftraditionaldistributionnetworkaswellasthenetworkoperationmode,especiallytheoperationofrelayprotectionandautomaticcircuitbreakerre-closing.Inthispaper,thecharacteristicsandinfluencesofseveraltypesofdistributedgenerationandconnectionpattern,relayprotectionandautomaticcircuitbreakerre-closingareanalyzed.Standardsofrelayprotectionwhendistributedgenerationaccesstodistributionnetworkarediscussedaswell.

简介：TheConductorandHardwareResearchDivisionoftheElectricPowerConstructionResearchInstitute,MinistyofEnergy,isascientificresearchandtestbaseforstudyofmechanicalpropertiesoftransmissionlineconductorandhardwareinChina,whichhasahistoryof32yearslong.TheDivisionnowpossessesastaffofabout20,including5seniorengineersand5engineers.TheDivisionpossessesalsoalab,itmainlydealsWiththetestandre-

简介：Fromthebeginningof1970’s,theresearchworkonstrandcurrentdistributioninhydro-generatorstatorbarshasbeenmademarkedprogressinChina.Inordertoknowwhythegeneratorbarinsulationswerebrokendownsooftenbothinop-erationandintestingafterthegeneratorsbeingputintooperationfor8-10yearsatXinanjiangHydropowerStation.Investigationswereconductedandtheresultsoffieldmeasurementshowedthatthe

简介：Withthearrivaloftheeraofpersonalautoconsumption,residentsareenjoyingtheconvenienceoftravel;however,problemssuchasenvironmentalprotection,transportation,purchasingrestrictionareplaguingconsumersatthesametime.Asaneffectivealternativetoconventionalvehicle,electricvehicleinrecentyearshasbeenwidelyconcernedduetoitscharacteristicsofenergysavingandenvironmentalprotection.ToidentifythekeyinfluentialfactorsinthedevelopmentofEVindustryinChinaisconducivetoformulatingreasonableindustrialdevelopmentstrategyandmeetingmarketdemandofconsumers.Inthispaper,thekeyfactorsinthedevelopmentofEVindustryareobtainedbyanalyzingBaiduIndexineachtimeperiod.

简介：Basedonmulti-module-cascadedinvertertopology,thisstudypresentedauniversalmultilevelinverterhybridtopologyandunifiedtheresearchesonmultilevelinvertertopology.Accordingtothefreedomofthisuniversaltopology,severalnewhybridtopologieswereconstructed.Also,basedonconventionalmodulationstrategies-multi-carrierSPWM(SinusoidalPulseWidthModulation),hybridmodulationstrategieswereintroducedcorrespondingtohybridtopologies,andamultilevelSVPWM(SpaceVectorPulseWidthModulation)techniquebasedonphase-shiftedtheorywasnaturallyproduced.Simulationandexperimentresultsprovethathybridtopologiesandcorrespondingmodulationstrategiesarevalid,whichlayafoundationforpracticalapplicationofhybridmultilevelinvertertopologies.

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简介：Towardstheanalysisofthedevelopmentalsituationofwindpowergenerationandelectricvehicles,anovelideaforstabilizingthefluctuationofwindfarms’outputbytheuseofbatteryswappingstationsofelectricvehiclesisputforwardinthispaper,toeffectivelyalleviatetheimpactofgrid-connectedoperationofwindfarmsonthepowersystemwhilepromotingthefieldoperationofchargingandbatteryswappingstations.Abatteryswappingstationistreatedasacapacity-variableenergystoragepowerstation,connectedtotheoutputterminalofawindfarm.AcombinedoperationmodelforwindfarmandbatteryswappingstationisestablishedbasedontheMATLAB/SIMULINKsimulationplatformandthecontrolstrategyisproposedfortheoperationofbatteryswappingstations.Thesimulationresultsshowthattheintroductionofabatteryswappingstationcaneffectivelystabilizethefluctuationofwindfarmoutput.

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简介：Reliableconnectionofturbinegeneratorsincomplexmainwiringstructurestothepowergridthroughapluralityofswitchesisanewkeyproblem,referredtoasmultipointautomaticsynchronization(MPAS),inautomaticcontrolsystems(ACS).Inthispaper,differentmethodsofvoltage-frequencyandphase-differencecontrolareanalyzed,andacontrolmethodologybasedonactivefrequencytracking(AFT)ispresented.Throughtheestablishmentofthemulti-pointautomaticsynchronizationmodelandtheanalysisofthegovernortransferfunctionwiththiscontrolmethod,theimportantcontrolparametersandautomaticprocesscontrolsequencearesummarized.Thecorrectnessandeffectivenessofthedesignedmethodologyareinspectedthroughon-sitetesting,andtheimportanceofthefunctionandselectionofparametersarealsoexplored.

简介：ChinaElectricityCouncilorganizedcompetentauthoritiesacrosstheindustryofelectricpowertoworkoutthe"ResearchReportsonthe12thFive-YearPlanforElectricPowerIndustry"innearlyoneyear,whichprovidesareferenceforgovernmentaldepartmentstoformulatethe12thFive-YearPlanonenergyandelectricpowerindustry.Themagazinewillpublishtheserialreportsincludingpowersources,powergrids,equipmentmanufacture,andpowereconomics.Thispaperpresentsthepartof"powereconomics,"inwhichtheeconomicanalysesontheelectricpowerindustryareputforward.

简介：Giventhedistributionfeatureofresourcessuchascoalandwater,therequirementsforthedevelopmentofChinesepowerindustry,andthefactofmonopolybyforeigncompanies,itisverynecessaryandsignificanttoindependentlyresearchanddevelopair-coolingtechnologies.Throughexperimentalresearch,simulativecalculation,processandequipmentdevelopment,fieldtestsandademonstrationproject,thedesignandoperationtechnologiesforair-coolingsystemaregraspedandrelevantkeyequipmenti...

简介：Accordingtoperformanceanalysisofathree-phasegrid-connectedinvertermathematicalmodelofadirectly-drivenwindturbinewithapermanentmagnetsynchronousgenerator(D-PMSG)underunbalancednetworkvoltageconditions,adualcurrent-loopcontrolstrategy(DCC)orientedonpositivevoltageandnegativecurrentisproposedtoinhibittheDCvoltagefluctuation.Meanwhile,anotchfilterisintroducedintotheconventionalcontrolstrategyofaphase-lockedlooptocompletethelowvoltageridethrough(LVRT)abilityofthewindgenerator.A1.5-MWD-PMSGwithaback-to-backIGBTfrequencyconverterwassimulatedinthePSCAD/EMTDCenvironment,andsimulationresultsshowedthat:themaximumwindpowertrackingwasachievedinthissystemandtheproposedDCCstrategycouldsuccessfullyinhibittherisingagingofDCvoltageandenhancetheride-throughcapabilityofD-PMSGwindgenerationsystemunderunbalancednetworkvoltageconditions.

简介：Attheendoflastyear,theeditorsfromPowerandElectricalEngineersinterviewedZhouXiaoxinon"FundamentalResearchonEnhancingOperationReliabilityforLarge-ScaleInterconnectedPowerGrids",aprojectof"973Program".Mr.Zhou,thechiefengineerofChinaElectricPowerResearchInstitute(CEPRI)andanacademicianofChineseAcademyofSciences,isthechiefscientistinchargeofthisresearchproject.