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1、第x卷第x期电测与仪表Vol.xNo.xx年第x期ElectricalMeasurement&InstrumentationDec.x分布式光伏电源对配电网电压波动的影响研究*陈懿,刘涤尘,吴军,陈炜,徐雨田(武汉大学电气工程学院,武汉430072)摘要:分布式光伏电源接入配电网后导致电压波动加剧等问题,限制了光伏发电的快速发展。文章从理论角度分析得到光伏功率波动水平以及光伏电源接入点短路容量大小是影响配电网电压波动大小的主要因素;考虑到未来光伏容量不断增加,光伏功率波动水平必将不断提高,因此增大接入点短路容量是降低电压波动实现大量分布式光伏电源接入配电网
2、最为可行的方法,而配电网采用环网结构能增大接入点短路容量;最后在PSCAD/EMTDC中搭建了完整的光伏电源系统以及IEEE13节点模型,仿真验证了配电网采用环网结构增大短路容量能有效削弱光伏电源对配电网电压波动的影响,为分布式光伏的良好发展奠定基础。关键词:分布式光伏电源;电压波动;配电网;PSCAD/EMTDC;环网结构中图分类号:TM711文献标识码:A文章编号:1003-0000(2018)00-0000-00Researchoninfluencesofdistributedphotovoltaicgenerationonvoltagefluctu
3、ationsindistributionnetworkChenYi,LiuDichen,WuJun,ChenWei,XuYutian(SchoolofElectricalEngineering,WuhanUniversity,Wuhan430072,China)Abstract::Voltagefluctuationsandotherissuesbecomemoreseriouswhenthedistributedphotovoltaic(photovoltaic(PV)powersupplyaccessaccessestodistributionnetw
4、ork,whichlimitinglimitstherapiddevelopmentofphotovoltaicpowergeneration.ThearticleThispaperconcludesfromthetheoreticalpointofviewthatthelevelofphotovoltaicpowerfluctuationandtheshort-circuitcapacityofthephotovoltaicpowersupplyaccesspointarethemainfactorsthataffectthefluctuationoft
5、hedistributionnetworkvoltage.ConsideringtheincreaseofPVcapacityinthefuture,thebetterwaytoweakenvoltagefluctuationistogainthenetworkshortcircuitcapacitythroughtheloop-closeoperationofannularnetwork,whichisalsobeneficialformorePVgenerationtobeconnectedtodistributionnetwork.Thecorrec
6、tnessofabove-mentionedanalysis,whichlaysthefoundationforthegreatdevelopmentofdistributedPV,isverifiedbyusingPSCAD/EMTDCtoestablishnumericalexamplesofdistributionnetworksIEEE13-nodemodelwithPVgenerationsystem.Keywords::distributedphotovoltaicgeneration,voltagefluctuation,distributi
7、onnetwork,PSCAD/EMTDC,annulargrid第x卷第x期电测与仪表Vol.xNo.xx年第x期ElectricalMeasurement&InstrumentationDec.x0 引言如今,*基金项目:国家电网公司科技项目(5211011400BT);国家自然科学基金项目(51207114)能源储备逐渐减少、环境质量逐渐下降,采取开发利用清洁可再生能源是实现可持续发展的重要途径,其中太阳能具有具有资源充足、取用便捷的优点,是被社会普遍认可最值得开发的可再生能源[1]第x卷第x期电测与仪表Vol.xNo.xx年第x期Electrica
8、lMeasurement&InstrumentationDec.x