2017-直流微电网母线电压波动分类及抑制方法综述-王成山

371Vol.37No.1Jan.5,201784201715ProceedingsoftheCSEE©2017Chin.Soc.forElec.Eng.DOI10.13334/j.0258-8013.pcsee.1608070258-8013(2017)01-0084-14TM71王成山，李微，王议锋，孟准，杨良(天津大学智能电网教育部重点实验室，天津市南开区300072)DCBusVoltageFluctuationClassificationandRestraintMethodsReviewforDCMicrogridWANGChengshan,LIWei,WANGYifeng,MENGZhun,YANGLiang(KeyLaboratoryofSmartGridofMinistryofEducation,TianjinUniversity,NankaiDistrict,Tianjin300072,China)ABSTRACT:ThekeypointtomaintainstableoperationofDCmicrogridistoensurestabilityoftheDCbusvoltage,andtheDCbusvoltagecontrolmethodsneedin-depthstudy.Atfirst,thispaperdividedDCbusvoltagefluctuations(DCBVF)intotwotypesaccordingtothetimescale,frequencycharacteristicandproducemechanismofDCBVF,namelydisturbancetypeDCBVFandoscillationtypeDCBVF.Andthen,theexistingrestraintmethodsforthesetwotypesoffluctuationswerereviewedrespectively,andthelayeredcoordinativecontrolstructureofDCmicrogridwasintroduced.ThispapermainlyfocusedattheoverviewofloadcurrentandpowerfeedforwardcontrolmethodofbidirectionalAC/DCconverter,DCsidepowerfluctuationsuppressionmethodofAC/DCconverterunderunbalancedandharmonicgridconditions,theexistingvoltagebusconditionertopologies,theDCmicrogridmulti-sourcecoordinationcontrolandtheenergymanagementmethod.Finally,thefuturedevelopmentdirectionsofsuppressionmethodfordisturbanceandoscillationtypeDCBVFweregiven.KEYWORDS:DCmicrogrid;busvoltagefluctuationclassification;busvoltagecontrol;busvoltageregulation;busvoltageconditioner(DCbusvoltagefluctuationsDCBVF)DCBVFDCBVFAC/DC863(2015AA050603)(51307117)(14ZCZDGX00035)SupportedbytheNationalHighTechnologyResearchandDevelopmentProgramofChina(863Program)(2015AA050603);NationalNaturalScienceFoundationofChina(51307117);TianjinMunicipalScienceandTechnologyCommission(14ZCZDGX00035).DCBVFAC/DC(voltagebusconditionerVBCDCBVFDCBVF0[1][2-3]1[4]185DC/DCDC/DCDC/ACAC/DCDC/DCDC/DCDC/ACDC/DCAC/DC1Fig.1StructureofDCMicrogrid[5][6][6]()(DCbusvoltagefluctuationsDCBVF)DCBVFDCBVFAC/DCDCBVFAC/DCDCBVFDCBVFDCBVF1[7]123456()DCBVFDCBVFDCBVF2DCBVFDCBVF//|(kHz)(MHz)(Hz)2Fig.2ClassificationofDCbusvoltagefluctuation1.1DCBVFDCBVFdcDGstorloadacd/d()Cutiiii(1)udciDGistoriloadiacDC/AC8637(1)DCBVFDCBVFDCBVFDCBVFAC/DC[7]1.2DCBVF1.2.157AC/DCDCBVFjjjjeeeettdqdqttdqdqEEEIII(2)+”“”+”“”jjjjjjjj2j2(ee)(ee)(ee)(ee)eettttdqdqdqdqttjttdqdqdqdqttdqdqdqdqdqdqdqdqSEEIIEEIIEIEIEIEI(3)“*”(3)0cos2sin2cos(2)sin(2)PPPwtPwt(4)57AC/DC0cos6sin6cos12sin12cos(6)sin(6)cos(12)sin(12)PPPwtPwtPwtPwt(5)257612DCBVFAC/DC[8-10]PIPIRAC/DC(totalharmonicdistortionTHD)1.2.2AC/DCDC/DCDC/AC[11-12][12]xAx(6)xAAs(z)[11]z[12]LC187LC(DCdistributedpowersystemDCDPS)[13-14]3[13](busvoltagecontrolconverterBVCC)(buscurrentcontrolconverterBCCC)DCDPSo1S1()()()ivsGsvso2L2()()()ivsGsvsvo2(s)vi1(s)vo1(s)vi2(s)Zos(s)ZIL(s)3Fig.3StructureofDCcascadingsystemZOS(s)ZIL(s)GS(s)GL(s)GT(s)LTm()()()1SGsGsGsT(7)TmGT(s)S(1,j0)Tm=ZOS(s)/ZIL(s)Tm=ZIL(s)/ZOS(s)[13,15]DCDPSTmbusmbusvcZTZ(8)Zv-busZc-busBVCCBCCC1[13]ZOSZIL180°Tm04fL(fL)[13]0090180fffHfLZILZILZOSZOS4Fig.4BodeCharacteristicsofZOSandZILunderunstableconditions2[14](9)busbusbuspeakVZI(9)osbusosbus/2022cos()110mmGZZZZ(10)ZbusZOSZILZbus(10)mGmTm(9)(10)TmMiddlebrookWildrickFengXiaogang5(a)(b)(c)Tm[16-18]5(c)8837(b)Wildrick(1,j0)(a)Middlebrook(1,j0)ReImReIm1mrGm1mrG(c)FengXiaogang(1,j0)1mrGReIm5Fig.5StabilitycriterionofcascadesystemsPWMPFMDCBVF4.221.1DCBVF[19]DCBVFAC/DC[20-34][35-36]PIDCBVFAC/DCDCBVF2.1PWM2.1.1DCBVF[20-21]AC/DCPWM6PWM77dcdcrefload()()()()()()1()()()viviviGsGsvsVsGsGsSCisGsGsSC(11)(11)iloadirefiloadiloadiload8189eaebeciaibicRLvavbvcCLOADioiloadicvdc6PWMFig.6Three-phasePWMrectifierGvGi1/(sC)ioiloadicvdcirefVdcref7PWMFig.7Doubleclosed-loopcontrolstructureofthree-phasePWMrectifierGi1/(sC)ioiloadicvdcirefVdcrefGfiref1iref2Gv8PWMFig.8CurrentfeedforwardcontrolstructureofPWMrectifier8dcdcrefload()()()()()()()()1()()()vivifiviGsGsvsVsGsGsSCGsGsisGsGsSC(12)1()()fiGsGs(13)dcdcref()()()()()()viviGsGsvsVsGsGsSC(14)iload(13)[22-23]PI[24][25]DCBVFDCBVF2.1.2DCBVF[26-29]BTBDC/DCDC/ACDCBVFPWM6PWMabc/dqPWMCinoutdcloaddcdcinout32ddddccPeiPvivPCvtPPP(15)(15)9[30]GvGi1/(sC)idiloadicvdcidrefVdcrefK1.5Pload/edio9PWMFig.9PowerfeedforwardcontrolstructureofPWMrectifier9037[31]2.1.3DCBVF[32-33][34-36]BTBPWM10DC11GUGKGZZLGDrefˆurefˆiloadˆiˆudcˆuoˆi10Fig.10Small-signaldiagramofdualclosedloopGUGKGZZLGDGVGIrefˆurefˆiloadˆiˆudcˆuoˆi11Fig.11Controldiagramwithpowerandinputvoltagefeed-forwardcompensator2.2[34]BTBudcioiloaddcdcoloadddUCiit(16)(16)ssdcdcodcdcloadloaddcdcload1(1)()()(1)()010()()[10]()TTUkUkikCCikikUkUkik(17)sdc1/01TCAsdc/0TCB[10]Cdcload(1)(1)(1)Ukxkikdcload()()()Ukxkikˆ()xkdcloadˆ()ˆ()Ukikdcˆˆ()()ykUkˆ()xkˆ()yk(17)(1)()()()()xkAxkBukykCxk(18)12(k+1)ˆ(1)()()xkAxkBuk(19)BCAZ1IAZ1ILBCˆ()xkˆ(1)xk()xk(1)xk(1)ykˆ(1)yk()uk(1)xk12Fig.12St