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1、第32卷第19期中国电机工程学报Vol.32No.19Jul.5,2012162012年7月5日ProceedingsoftheCSEE©2012Chin.Soc.forElec.Eng.文章编号:0258-8013(2012)19-0016-08中图分类号:TM76文献标志码:A学科分类号:470·40双馈风电场新型无功补偿与电压控制方案111222栗然,唐凡,刘英培,王铁强,贾京华,程伦(1.新能源电力系统国家重点实验室(华北电力大学),河北省保定市071003;2.河北省电力公司,河北省石家庄市050021)ANewSc
2、hemeofReactivePowerCompensationandVoltageControlforDFIGBasedWindFarm111222LIRan,TANGFan,LIUYingpei,WANGTieqiang,JIAJinghua,CHENGLun(1.StateKeyLaboratoryofAlternateElectricalPowerSystemWithRenewableEnergySources(NorthChinaElectricPowerUniversity),Baoding071003,HebeiP
3、rovince,China;2.HebeiElectricPowerCompany,Shijiazhuang050021,HebeiProvince,China)ABSTRACT:Inordertocoordinatepositiveandnegative时则结合送出线路纵联差动保护控制SVC的等效电纳,避reactivepowercapacityofdoublyfedinductiongenerator免保护动作时发生电压过冲的现象,同时改变机组内部无功(DFIG)andimprovevoltagestabilityofth
4、egrid,aparallel分配以提高双馈风电机组故障穿越能力。最后以实际算例仿reactivepowercompensationschemeofDFIGbasedwind真表明上述无功补偿与电压控制方案的可行性和有效性。farmwasproposed.Bythisscheme,capacitorwhose关键词:双馈风电场;无功补偿;电压协调控制;三层无功capacitanceequalstocountdownofstatorinductanceofDFIG分配;电压过冲isinstalledattheterminalof
5、everywindturbine,andstaticvarcompensator(SVC)isinstalledinlowvoltagesideofstep-up0引言transformerofthewindfarm.Basedonthereactivepower随着风电接入容量的不断增大,风电功率的随compensation,acoordinatedvoltagecontrolschemewasintroduced.Insteadystate,three-levelreactivepower机变化给局部电网电压稳定构成威胁。
6、双馈感应发allocationcannotonlymakefulluseofreactivepower电机(doublyfedinductiongenerator,DFIG)具有PQcapabilityofDFIGdrivenwindturbines,butalsoreducewind解耦控制能力,采用DFIG的风电场能够为电网提farm’spowerloss.Combinedwithpilotprotectionofoutput供电压支撑[1-2],但双馈风电机组输出无功功率势必deliveryline,equivalent
7、susceptanceofSVCiscontrolledto增大变流器中流过的电流,降低机组运行可靠avoidvoltageovershootafterfaultclearing.Meanwhile,[3-4]性,同时会降低功率因数,增大集电系统和机组reactivepowerallocationinsidegeneratorischangedtoimprovefaultridethroughcapability.Finally,thesimulationof内部的有功损耗。因此令双馈风电场参与调压应首apracticalex
8、ampleverifiesthefeasibilityandefficiencyofthe先保证机组运行可靠性,并尽量减小风电场中的功proposedscheme.率损耗。文献[3]提出电压控制中可根据各机组无功KEYWORDS:doublyfedinductiongener