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时间:2020-04-24
《光伏并网逆变器的阻抗重塑与谐波谐振抑制-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第34卷第27期中国电机工程学报Vo1.34No.27Sep.25,20142014年9月25日ProceedingsoftheCSEE~2014Chin.Soc.forElec.Eng.4547DOI:10.13334~.0258-8013.pcsee.2014.27.001文章编号:0258-8013(2014)27—4547.12中图分类号:TM46光伏并网逆变器的阻抗重塑与谐波谐振抑制曾正,赵荣祥,吕志鹏2,马丽2(1.浙江大学电气工程学院,浙江省杭州市310027;2.中国电力科学研究院,北京市海淀区100192)ImpedanceReshapingofGrid-tiedInvert
2、erstoDamptheSeriesandParallelHarmonicResonancesofPhotovoltaicSystemsZENGZheng,ZHAORongxiang,L0Zhipeng,MALi(1.CollegeofElectricalEngineering,ZhejiangUniversity,Hangzhou310027,ZhejiangProvince,China;2.ChinaElectricPowerResearchInstitute,HaidianDistrict,Beijing100192,China)ABSTRACT:Thecontrolofoutputim
3、pedanceofgrid—tied振的机理及其影响因素。其次,提出一种能重塑光伏并网逆invertersisinvestigatedtoreshapetheimpedancenetworkof变器高频输出阻抗的控制策略。利用基于二阶广义积分器的thedistributedphotovoltaic(PV)system.Firstly,intheview陷波器滤除并网电压/电流基波分量后,经过输出阻抗控制poinofatypicaldistributedPVsystem,theseriesandparallel后反馈到其指令电流(或调制信号)中,从而重塑并网逆变器harmonicresonanc
4、esinsingleLCL·-basedgrid-tiedinverter的输出阻抗。当重塑后的阻抗呈现足够大的阻性时,可有效andmultipleinvertersarestudied.Besides,thefactorsthat抑制网络内的高频谐波谐振最后,利用PSCAD/EMTDCinfluenceonresonancesarealsoquantified.Then,acontrol的仿真结果和一个微电网的实验结果验证所提控制策略的strategyisproposedtomaintaintheimpedanceofagrid—tied正确性和有效性。invertertodamptheha
5、rmonicresonancesinthePVsystem.In关键词:分布式光伏;并网逆变器;虚拟电阻;网络阻抗重thepresentedcontrolscheme,withtheaidofvirtualimpedance塑;串并联谐波谐振;谐振阻尼gain,theoutputvoltageandcurrentofthegrid—tiedinverterarefilteredbySecond-Order-Generalized--Integratorbasednotch0引言filterandfedtoreferencecurrentpartandmodulationpart,近年来,全球能
6、源危机和环境问题日益加剧,respectively.Theintroducedvirtualimpedancecandampthe光伏等可再生能源得到了越来越多的关注⋯,随着possibleharmonicresonancesinthecasesofvirtualresistors光伏电池成本的不断降低,并网光伏发电系统有望areemployed.Additionally,theefectivenessofthevirtualresistorsonresonancesdampingisalsodepictedandchecked.在未来电力系统中得到更加广泛的应用【2J。然而,Finally,
7、simulatedresultsperformedonPSCAD/EMTDCand伴随着光伏渗透率的不断提高,光伏并网逆变器对experimentaltestsfromamicro—griddemonstrationare配电网的安全稳定和电能质量等带来了不小的挑indicatedtoverifythevalidationandfeasibilityoftheproposed战l3]。特别是,在分
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