感染创面的处理及个案分析.ppt

7320117JournalofShenyangInstituteofEngineeringNaturalScienceVol.7No.3Jul．20112011－05－041968－．110181．．3．TM614A1673－1603201103－0199－04“”、“”．122．1．13．1．、．2．．31．2“”．．1pu、·200·7．①．②、．③．④、．⑤2．3、①②．．IGBT21.23．．3．1750STATCOM．STATCOM、IGBT．STATCOM112．21150MW30MVar10kVS7500.8pu、3s60%．0.6pu0.6pu．STATCOM11．STATCOM6%13.5%6%STATCOM24.4%．750700kVarSTATCOM．7500.8pu．750700kVar0.6pu0.8pu4．20%625ms．3．3311111．．90%20ms690V、50Hz．3·201·．．4．43．2．3．1Crow-barresistance．1crow-barCrow-bar．Crow-bar60～80ms．Crow-bar．Crow-bar．2FastReconnection．Nordex．100msCrow-bar．100msCrow-bar．Crow-barCrow-bar．3ChopperResistance．VESTAS．IGBT．IGBTIGBT．DC-Linkchopperresistance．3．35．5．22．．1600A．·202·7．．5．．380～100ms、、80～100ms．20052009Windtest．．4201081500kW201010、、．1．J．200417516－17．2．J．2007312384－89．3．J．200612610130－135．4．J．200630821－26．5．J．2004246100－105．Lowvoltageride-throughprogramofseveralcommontypesofwindturbinesHANTian-xueNortheastNewEnergyDevelopmentCo．Ltd．ChinaPowerInvestmentCorporationShenyang110181ChinaAbstractAsthemostpromisingcleanenergythewindpowerdevelopmentbecomesmoreandmoreimportantinpolicyandmarket．PlanningbytheNationalEnergyBoardinstalledwindpowercapacityby2020toreach1.5millionkilo-wattsaccountingfor8．5%ofinstalledcapacityisthethirdlargestpowersource．Becausethewindpowerhasrandomuncontrollableandotherfeatureswindturbineismorelikelytolosesteadystatecomparedtothetraditionallargecapaci-tygeneratorwindturbinesandnetworkissuesbecomeveryprominent．NationalEnergyBoardisdeveloping“windpowerdetectionandmanagement”andsothestateisexpectedtoreleaseinthenearfutureinthemostrecentperiodwindpowerwindfarmissuewillbethefocus．“Lowvoltageridethroughcapabilities”isasoneofthedifficultiestoconnectthegridthestatealsohasdoneaspecification．Inthisarticlecombinedwithprojectthathasbeenputintothreecatego-riesofthebeipiaoprojectthe“lowvoltagethroughtheprogram”ofcommonwindturbineareanalyzed．Keywordslowvoltagethroughconstantspeedwindturbinedoublyfedwindturbinedirectdrivenpermanentmagneticwindturbineconverter