基于dq变换的三相软件锁相环设计

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dq1,2,1(1.,210061;2.,210003):,(SPLL),dqSPLL,PISPLL。,T/4(T)、,。,,,SPLL、,。:;dq;;、:TP214:A:1006-6047(2011)04-0104-03ElectricPowerAutomationEquipmentVol.31No.4Apr.2011314201140dq,PI,(SPLL)。,[1-3],T/4(T)、,。,,。1SPLLSPLL[4-5]ua、ub、ucαβ,αβdq,ud、uq。uαuβ=23姨1-12-1203姨2-3姨2姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨uaubuc姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨(1)uduq=cosθsinθ-sinθcosθuαuβ(2)(2)θSPLL。,ud,uq。,uq,,PIω軍,2πf。,θ。SPLL,PI。SPLL1。2SPLL2,PI,,,。,0~2π。,AD。Gc(s)=(1+Ts)(Kps+Ki)Ts3+s2+Kps+Ki(3),T;Kp,Ki。0+-PI++2πf1sθuqdqsincos11+Tsαβuαuβuaubuc1SPLLFig.1PrincipleofSPLL:2010-04-11;:2010-12-22:(SG0833)ProjectsupportedbyStateGridCorporationofChina(SG0833)2SPLLFig.2BlockdiagramofSPLLcontrolφ+-++2πf1sθ11+TsKp+Kis(4),:Kp>TKi>0Ki>>0(4)[6],、、,,bode,3。3,,。100πrad/s,0dB,,PI,。,,100πrad/s,dq,200πrad/s[7],[8],,,,。、T/4。3、,、、3。,αβ,αβ,。,,。,、。2:a.;b.。、,、T/4[9-10]。(5)、:Uα(t)=Upcos(ωt+θp)+Uncos(-ωt+θn)Uβ(t)=Upsin(ωt+θp)+Unsin(-ωt+θn>)(5),Uα(t)、Uβ(t)α、β;Up、Un、。(6)T/4。π/2,π/2。Uα(t-T/4)=Upcos(ωt+θp-π/2)+Uncos(-ωt+θn+π/2)Uβ(t-T/4)=Upsin(ωt+θp-π/2)+Unsin(-ωt+θn+π/2>>>>>>>>>>>>>)(6)(6),(7):Uα(t-T/4)=Upsin(ωt+θp)-Unsin(-ωt+θn)Uβ(t-T/4)=-Upcos(ωt+θp)+Uncos(-ωt+θn>)(7)(5)(7),(8):Uαp=Upcos(ωt+θp)=12(Uα(t)-Uβ(t-T/4))Uβp=Upsin(ωt+θp)=12(Uα(t-T/4)+Uβ(t)>>>>>>>>>>>>>)(8),Uαp、Uβpαβ。,T/4,、。,。4,,1。60%4,,,uSPLL4(uh)。,。,50~45Hz,5(uf)。。,π/3,6(u),,。,a,b2,c1/2,7。,。3bodeFig.3Bodechartsofcontrolsystemω/(rad·s-1)A/dB/(°)0-20-400-45-901011021031044Fig.4Outputvoltageandharmonicvoltage1.50-1.5uSPLL,uh/VuSPLLuh00.020.040.060.080.10t/s,:dq489,、uq。、,,uq2,。、,,uq2,,。5,dq,PI,。T/4、,。,,,。:[1]CHUNGS.Aphasetrackingsystemforthreephaseutilityinterfaceinverters[J].IEEETransonPowerElectronics,2000,15(3):431-438.[2]RODFIGUEZP,SAINZL,BERGASJ.Synchronousdoublerefe-renceframePLLappliedtoaunifiedpowerqualityconditioner[C]∥10thInternationalConferenceonHarmoniesandQualityofPower.RiodeJaneiro,Brazil:[s.n.],2002:614-619.[3]TIMBUSAV,LISERREM,BLAABJERGF,etal.PLLalgorithmforpowergenerationsystemsrobusttogridfaults[C]∥Procee-dingsofIEEEPESC(PowerElectronicsSpecialistsConference)AnnualMeeting.Jeju,Corea:IEEE,2005:7-10.[4],,.[J].,2007,41(7):47-49.ZHOUGuoliang,SHIXinchun,FUChao.Operationofasoftwarephaselockedloopunderdistortedthree-phasevoltage[J].PowerElectronics,2007,41(7):47-49.[5],,.[J].,2009,24(10):94-99.GONGJinxia,XIEDa,ZHANGYanchi.Principleandperfor-manceofthethree-phasedigitalphase-lockedloop[J].Transac-tionsofChinaElectrotechnicalSociety,2009,24(10):94-99.[6].[M].:,2001:192-204.[7]KAURAV,BLASKOV.Operationofaphaselockedloopsystemunderdistortedutilityconditions[J].IEEETransactionsonIndustryApplications,1997,33(1):58-63.[8]DJOKIEB,SOE.Phasemeasurementofdistortedperiodicsignalsbasedonnonsynchmnousdigitalfiltering[J].IEEETransonInstrumMeas,2001,50(4):864-867.[9].PWM[D].:,2006.HEMingming.StudyoncontrolschemeforPWMrectifierundergeneralizedunbalancedgridconditions[D].Hangzhou:ZhejiangUniversity,2006.[10]PASCALR,HERVEP,JEAN-PAULL.RegulationofaPWMrectifierintheunbalancednetworkstateusingageneralizedmodel[J].IEEETransonPowerElectronics,1996,11(3):495-502.(:):(1982-),,,,,(E-mail:jizhenghua@sgepri.sgcc.com.cn);(1984-),,,,,;(1980-),,,,,。7Fig.7Unbalancedthree-phasevoltage3uSPLL,ua,b,c/Vt/s0-3uSPLLua00.020.040.060.080.10ubuc5Fig.5Voltagewithfrequencymutationt/suSPLL,uf/V30-3uSPLLuf00.040.080.120.160.20t/s6Fig.6VoltagewithphasemutationuSPLL,u/V0-3uSPLLu00.040.080.120.160.2038、uqFig.8Voltagewaveformofuqwithoutseparationofpositiveandnegativesequencecomponentst/s50uq/V0-5000.020.040.060.080.10、uq9、uqFig.9Voltagewaveformofuqwithseparationofpositiveandnegativesequencecomponentst/s100uq/V50-5000.020.040.060.080.10、uq031,,,(,100191):,DeviceNet、Profibus-DPHART。,,,(MCU),,,。。:;;;;:TP271+.4:B:1006-6047(2011)04-0107-05ElectricPowerAutomationEquipmentVol.31No.4Apr.2011314201140、、。,,,DeviceNet、Profibus-DP[1-2],。HART,,4~20mA,[1,3]。,。,,[4-6],,,。,,DeviceNet、Profibus-DPHART,,。,,。。1:。2,,。,、,。,,,,。,、,、。1。3,:2010-07-14;:2011-02-18:863(2007AA041407);(CSTC,2008AC3127)ProjectsupportedbytheNationalHighTechnologyResearchandDevelopmentProgramofChina(863Program)(2007AA041407)andtheKeyTechnologiesResearchandDevelopmentProgramofChongqing(CSTC,2008AC3127)Three-phasesoftwarephase-lockedloopbasedondqreferenceframeJIZhenghua1,WEIFenqing2,YANGHaiying1(1.NARITechnologyDevelopmentLimitedCompany,Nanjing210061,China;2.StateGridElectricPowerResearchInstitute,Nanjing210003,China)Abstract:AsthetraditionalPLL(Phase-LockedLoop)cannotobtainaccuratephasesunderdistortedvoltage,alinearmodelofSPLL(SoftwarePhase-LockedLoop)basedondqcoordinatetransformtheoryisproposedandanewthree-phaseSPLLisachievedbyPIcontrol.Whenthethree-phasevoltageisunbalanced,theT/4shiftmethodisusedtoseparatethepositiveandnegativesequencecomponents,whicheffectivelyinhibitstheinfluenceofnegativesequencecomponentonphasecalculation.Theproposedcontrolstrategyissimulatedwiththeexperimentalsystemfordifferentvoltagedistortionsandunbalancedthree-phasevoltages.ResultsshowthatthepresentedSPLLgreatlysuppressesthevoltagedistortion,withfastdynamicresponseandgoodsteadyperformance.Keywords:SPLL;dqcoordinatetransform;disto

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