简介：InMarchthisyear,NorthChinamainnetworkwasinterconnectedwithShandongnetworkthrougha500-kVlinebetweenXin'anSubstation(HebeiHandan)andLiaochengSubstation(Shandong).Asaresult,all500-kVlinesofNorthChinaPowerNetworkhavebeenconnectedtothemainnetwork.

简介：Ｔｉａｎ－ＧｕａｎｇＨＶＡＣ／ＤＣＮｅｔｗｏｒｋＤｉｓｐａｔｃｈｉｎｇＣｅｎｔｅｒ，ＳＣＥＰ１．ＦｏｒｅｗｏｒｄＯｎＡｕｇｕｓｔ３，１９９３ｔｈｅＳｏｕｔｈＣｈｉｎａＩｎｔｅｒ－ｃｏｎｎｅｃｔｅｄＰｏｗｅｒＮｅｔｗｏｒｋｃｏｖｅｒｉｎｇ４ｐｒｏｖｉｎ...

简介：ＣｏｍｍｅｒｃｉａｌｉｚｅｄＯｐｅｒａｔｉｏｎｏｆＳｏｕｔｈＣｈｉｎａｉｎｓｔｅｒｃｏｎｎｅｃｔｅｄＰｏｗｅｒＮｅｔｗｏｒｋＤｉｓｐａｔｃｈｉｎｇＣｅｎｔｅｒｏｆＳＣＥＰａｂｓｔｒａｃｔＴｈｉｓｐａｐｅｒｉｎｔｒｏｄｕｃｅｓｔｈｅｐｏｗｅｒａｎｄｅｎ...

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简介：OnJanuary10,ademonstrationprojectofSGCCinZhejiangProvinceforelectricvehicles-asmartcharging&exchangingservicenetworksuccessfullypassedthescientific&technologicalachievementinspectionorganizedbyChinaElectricityCouncilinHangzhou,whichturnsouttobethefirsttrans-cityinterconnectedsmartcharging&exchangingserviceoftheworldandsignifiesitsleadinglevelinternationally.

简介：<正>Neuralnetworkhastheabilitiesofself-studying,self-adapting,faulttoleranceandgeneralization.Buttherearesomedefaultsinitsbasicalgorithm,suchaslowconvergencespeed,localextremes,anduncertainnumberofimpliedlayerandimpliednotes.Thispaperpresentsasolutionforovercomingtheseshortagesfromtwoaspects.Oneistoadoptprinciplecomponentanalysistoselectstudysamplesandmakesomeofthemcontainsamplecharacteristicsasmanyaspossible,theotheristotrainthenetworkusingLevenberg-Marquardtbackwardpropagationalgorithm.Thisnewmethodwasprovedtobevalidandpracticableinsiteselectionofpracticalgarbagepowergenerationplants.

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简介：Theurbanelectricpowerdistributionnetworkrequireshighersupplyreliability,butthedecisionofinvestmentpolicyischieflydependentonthesecuritystandardsadoptedbythesupplyutilities.Thus,theformulationofreliabilitystandardsdeservesseriousconsiderationevenregardinginvestmentalone.Supplyreliabilitycanbeexpressedintermsofsupplyavail-ability,whichrelatestoannualdurationofinterruptionperconsumer.

简介：InordertosolveabottleneckprobleminpowernetworksafetyoperationtheElectrotechnicalResearchInstituteundertheChineseAcademyofSciencehasfinishedadevelopmentworkofprototypehigh-temperaturesuperconductingcurrentlimiterwithindependentintellectualpropertyrightsonthebasisofatheoryadvancedonitsown.Suchalimiterhasovercomedisadvantagesinexistingonesworldwide.

简介：ThelendingcontractfortheprojectofinterconnectionbetweenNortheastandNorthChinawassignedbetweentheStatePowerCorporationandtheStateDevelopmentBankinBeijingonJanuary5,2001.Thetotalcontractedworthamountsto164millionyuan,thepay-backperiodis12years.Thisinterconnecti

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.

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