RenewableEnergyResources
可再生能源
Vol.37No.9Sept.2019
基于分布式平滑控制的光伏群输出功率
控制研究
渊1.摘袁袁要院曰袁袁袁帅江华1袁张俊飞1袁张建良2334109曰2.袁袁遥袁310007冤遥PVCUE-ESODSC曰遥曰关键词院中图分类号院TK514文献标志码院A文章编号院1671-5292渊2019冤09-1274-06
0
引言
袁尧遥袁渊Photovoltaic袁PV冤袁[1]遥袁渊Single-phaseGrid-connectedPVSystem袁SGPVS冤尧袁袁遥袁SGPVS渊PVCluster袁PVC冤袁院SGPVS袁尧袁SGPVS袁SGPVS曰PVC袁遥
袁SGPVS[2]尧[3]尧[4]遥袁SGPVS袁袁袁
收稿日期院2019-03-26遥
基金项目院渊U1509218冤遥通讯作者院渊1984-冤袁袁袁袁遥尧袁遥袁PVC[5]尧[6][7]遥袁PV袁袁袁袁遥PV袁PVC袁袁袁PV遥袁PVPV袁PVC尧袁遥
袁SGPVS袁渊UncertaintyEstimator袁UE冤渊ExpandedStateObserver袁ESO冤袁PVC袁渊DistributedSmoothControl袁DSC冤PVC袁遥
遥E-mail院10910059@zju.edu.cn
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帅江华袁等基于分布式平滑控制的光伏群输出功率控制研究
1
基于UE-ESO单相光伏并网逆变器控制方法SGPVS渊Grid-connectedInverter袁GCI冤袁袁GCI1遥院遥u曰e曰i曰L曰C遥
i
L
C
u
e
Fig.1Topology图1of单相光伏并网逆变器拓扑结构
single-phasePVgrid-connectedinverter
袁GCIu渊t冤=L
di渊t冤+Ri渊t冤+e渊t冤渊1冤院Rdt遥
渊1冤Laplace袁GCII渊s冤=P渊s冤V渊s冤渊2冤
院I渊s冤GCI渊冤曰PGCI渊s冤GCI袁V渊s冤=U渊袁s冤-P渊袁Es冤=1/渊E渊渊ss冤袁sL+R冤曰V渊s冤冤袁U渊s冤遥
渊1冤袁渊2冤GCI袁遥GCI袁I渊s冤=[P渊s冤+驻P渊s冤]伊[V渊s冤+D渊s冤]渊3冤院驻P渊s冤GCI曰D渊s冤遥
Estimator袁UE冤渊3冤袁V渊Uncertainty
d[8]V渊s冤s冤[P-1渊sd渊s冤=
F渊冤I渊s冤-Vt渊s冤]院F渊s冤1-F渊s冤渊4冤
曰VResonant袁袁Vtt渊sPR冤冤=I*渊s冤-I渊s冤曰袁CC渊渊s渊s冤s冤冤=Kp+Krs/渊s2+渊Proportion棕02冤曰I*渊s冤
I渊s冤遥
F渊s冤袁遥F渊s冤F渊s冤=1-e-T2s院T袁0.02s遥
渊5冤
袁遥渊4冤袁I*渊s冤袁渊4冤I渊s冤Vd渊s冤=
F渊s冤P-1渊s冤I渊渊6冤渊6冤袁1-F渊s冤s冤
袁遥
渊4冤袁UE袁遥渊Expanded袁[9]袁遥StateObserver袁ESO冤蓘袁GCI渊1冤蓡i鸳渊t冤=-RLi渊t冤+字渊t冤+b
u渊t冤L-e渊t冤渊7冤院i鸳渊t冤i渊t冤曰字渊t冤曰b袁1遥
扇设设设x设设1设设设x渊t冤=i渊缮设设渊tt冤=冤=-y渊2渊t冤=fRt冤
Li渊t冤+字渊t冤
设设设设x
觶2渊t冤=g渊t冤渊8冤
设设设设墒
设设v渊t冤=
u渊t冤-x
觶xLe渊t冤院x1渊t冤袁2渊t冤袁f渊t冤袁g渊t冤2渊t冤遥
x2渊t冤曰v渊t冤曰y渊t冤曰
渊8冤渊7冤院
扇设设设设x觶1缮设设设设设设x
觶渊t冤=f渊t冤=bv渊t冤墒
设设y2渊渊tt冤=冤=xg1渊渊tt冤冤
渊9冤窑1275窑
可再生能源
2019袁37渊9冤
渊9冤ESO袁ESO扇设设设设着=z觶1z
渊t冤-y渊t冤
缮设设设设设设1渊t冤=z觶2渊t冤-茁1fal渊着袁琢1袁啄冤+bv渊t冤设设觶z
渊t冤=-茁渊10冤
墒
22fal渊着袁琢院z2袁啄冤1渊t冤x曰1渊茁tfal渊着袁琢1冤1袁啄冤袁茁2曰琢曰z2渊t冤袁茁22fal渊着袁>0曰琢2袁琢啄1冤袁琢2fal<琢渊1着<1曰袁琢袁啄啄冤着嗓袁啄>0遥
fal渊着袁琢袁啄冤=
|着|琢着/啄1-琢singn渊渊11冤
院singn渊着冤袁|着|遥
跃着啄冤袁|着|跃啄
渊4冤UE渊10冤ESO袁袁2遥
i*PR
vtv
i
vUE
d1/b
bz2z1ESO
图2基于Fig.22DSCControl单相光伏并网逆变器的diagramPVCof输出功率控制方法SGPVSUE-ESObasedon的控制框图UE-ESO
SGPVS袁PVC遥袁PVC遥3遥袁遥
PV1PV2PViPVi+1PVn图Fig.33基于分布式平滑控制的SchematicdiagramofPVCPVCpower功率控制策略原理图controlstrategy
DSCPVCbasedonDSC
SGPVS院nSGPVSPVC袁SGPVSSGPVS袁
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曰PVCSGPVS袁遥袁PVC袁遥SGPVS袁渊5冤PVCSGPVSi鸳渊t冤=-
RLii渊t冤+ui渊t冤L-ei渊t冤渊12冤
院ii渊t冤袁ui渊尧t冤袁ei渊t冤尧iSGPVS遥
渊12冤SGPVS院x
觶i渊13冤=fi渊yi冤+滋i渊13冤
扇设设设xi设设设设yi=缮设设f=ixii设i渊yi冤=-R设设设Lii设渊t冤-ei渊Lt冤渊14冤设设滋i=ui墒
设设L渊t冤PVC袁SGPVS姿i袁P=PPii_max渊15冤院Pii_maxiSGPVS遥
PVCSGPVSPVC琢*袁扇设设设设P*=P
缮设设设设设设设姿墒
设1=姿2=噎=姿*=渊P*-院P*乙t渊16冤
遥
袁PPVC0P冤dt
渊16冤袁SGPVS遥
滋i=g渊椰移j沂Ndijxijj0曰x院dij袁djixix椰xxijij椰椰冤渊17冤
j袁dijijxixjg渊椰xij=dji曰>曰NiiPV遥
椰冤Lipschitz
帅江华袁等基于分布式平滑控制的光伏群输出功率控制研究
渊17冤SGPVS袁PVC袁PVCg渊||xij||冤g渊椰x遥ij3椰冤=
渊sin椰椰xxijij椰椰冤2渊18冤
3.1实验与仿真分析
单台SGPVS实验结果
UE-ESO袁袁PID遥1遥
表Table1单相光伏并网逆变器的控制参数与电气参数1ElectricalandcontrolparametersofSGPVS
Pnu/kW/Vf/Hz22010
u50dcf/V
400swL/kHz/mHR/m赘0.1510PIDPIDk0.1PRkp2.5p0.2PRKKp1.6ESOr0.1falESO渊着袁琢茁茁1fal渊着袁琢啄冤琢2150201袁12袁啄冤啄
琢2
0.120.30.044遥4渊a冤袁PID袁尧遥PID袁SGPVS渊TotalHarmonicDistortion袁THD冤渊DirectCurrentInjection袁DCI冤袁THD>5%袁DCI>3%遥4渊b冤袁UE-ESOSGPVS袁400
3004020030100
200
10
01020
30/ms
40
50
600
400渊a冤PID300402003010020
010
0
1020
40
50
600
图4不同控制方法下电网电压和电网电流随时间的
渊b冤UE-ESO30/ms
Fig.4Thechangesunderofdifferentgrid变化情况
voltagecontrolandmethod
currentovertime
袁THD<2%袁DCI<1.5%袁THD袁DCI袁袁遥UE-ESO3.2光伏群仿真结果分析
遥
DSCPVC袁MATLAB5SGPVS袁DSCPVC[7]袁5SGPVS8袁9袁10袁11袁12kW遥袁SGPVS遥5袁61.0PV10.8PV2PV3PV40.6PV5
0.40.2
0
0.5
渊a冤t1/s
1.5
2
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可再生能源
2019袁37渊9冤
50403020
100
0.5
渊b冤t1/s
1.5
2
图5利用传统分布式控制得到的光伏群输出功率Fig.5利用率和光伏群输出总功率随时间的变化情况overThetimechangesofPVCofbasedutilizationontraditionalratioanddistributedtotaloutputcontrol
power1.0PV10.8PV2PV3PV40.6PV5
0.40.2
0
0.5
渊a冤t1/s
1.5
2
50403020100
0.5
t1图6利用基于DSC渊b冤的PVC/s
1.52
输出功率控制方法得到的光伏群输出功率利用率和光伏群总输出功率随时间的
Fig.6Thechangesof变化情况
overtimeutilizationofPVCbasedratioandonDSC
totaloutputpower
遥
5袁袁袁袁袁遥6袁DSCPVCPVC尧窑1278窑
袁PVC遥DSCPVCSGPVS袁尧
4结论
遥
袁UE-ESO袁遥袁DSCPVC袁遥袁袁袁袁遥
参考文献院
[1]袁袁袁[J]..袁2019袁37渊1冤院59-[2]64.袁.[3][J].袁袁袁2005袁22渊4冤院583-587.[J]..袁2007袁31渊10冤院[4]50-54.[5]
Malekpour院.[D].
architectureAforR袁Pahwa袁2009.
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invertersJournalofwithEmergingcommonandDCSelectedbusandgrid-tiedPVTopicsACbus[J].IEEE[7]
Electronics袁2015袁3渊4冤院858-869.
inPowerXinstrategyHH袁generators[J].IEEEforLutheZH袁coordinationLiuY袁etal.TransactionsofAonmultiplecenter-freeSmartGrid袁2014袁5
photovoltaiccontrol[8]渊3冤院1262-1269.
Elformation-HawwarystabilizationM袁MaggiorefordynamicM.Distributedunicycles[J].IEEE
circular帅江华袁等基于分布式平滑控制的光伏群输出功率控制研究
[9]
.PID[J].袁
TransactionsonAutomaticControl袁2013袁58渊1冤院149-162.
2002袁9渊3冤院13-18.
ResearchonPVclusteroutputpowercontrolbasedon
distributedsmoothcontrol
渊1.ShangraoVocational&TechnicalCollege袁Shangrao334109袁China曰2.CollegeofElectricalEngineering袁ZhejiangUniversity袁Hangzhou310007袁China冤
ShuaiJianghua1袁ZhangJunfei1袁ZhangJianliang2Abstract院Anovelcontrolalgorithmbasedonuncertaintyestimatorandexpandedstateobserverisproposedtoresolvetheproblemscausedbyuncertaintyanddisturbanceinsingle-phasegrid-connectedPhotovoltaic渊PV冤generationsystem.Then袁inordertocontrolthetotaloutputpowerofPVclustercomposedofmassivePVs袁thedistributedsmoothcontrolisadoptedtoimprovethestaticperformanceandconvergencespeed.Experimentsandsimulationsarecarriedout袁andtheresultsshowthattheproposedstrategiescannotonlyenhancetheperformanceofsinglePV袁butalsorealizetheeffectivepowercontrolforPVcluster.
Keywords院uncertaintyestimator曰expandedstateobserver曰distributedsmoothcontrol曰photovoltaicgeneration
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