并联型有源电力滤波器的电流数字控制技术

华中科技大学硕士学位论文并联型有源电力滤波器的电流数字控制技术姓名：方昕申请学位级别：硕士专业：电力电子与电力传动指导教师：康勇;戴珂20060401IPIPWM,RCPIPIPIPIIIAbstractBeingthefast,potent,andeconomicalcontrolmeanstoindustrialdevices,powerelectronics,however,havealsodeterioratedpowerqualitybyinjectingthenon-negligibleharmonicsandreactivecurrenttothenetwork.Amongthosetechnologiesinharmonicsuppressionandreactivecompensation,theactivepowerfilter(APF)isthemostfamousone.Thisthesis,firstofall,hasintroducedtheharmonicreferencegenerationofAPFandthetypicalhysteresiscontrolbasedonthedesignandrealizationofthethree-phasethree-wireparallelAPF,andthenchosendigitalcontrolasitscentrecontentwithdetailedanalysisonPIconditionerandrepetitivecontrol.Firstly,thisthesishaspresentedthesystemstructureandoperationprinciplesofthree-phasethree-wireparallelAPF.Specifiedintroductionsoftheinstantaneousreactivepowertheoryaregiven,andaslidingwindowrecursivemethodasthelowpassfilterisproposedwhichissupposedtodepartthefundamentalcurrentfromtheloadandgettheharmonicreference.Theinfluenceonthecompensationcurrent,causedbytheinductanceconnectingtothenetwork,isgiveninthisthesisaftertheestablishmentofmathematicmodelofAPF.Typicalhysteresiscontroloncurrentisintroducedanditssimulationresultshavedepicteditscompensationcharacteristics,whicharefollowedbytwoimprovedmethodsinbriefastoovercometheinnerdeficienciesoftraditionalhysteresiscontrol.Takingthedigitalcontrolasitscentrecontent,thisthesishasproposedaPWMcontrolwayoncurrent.ThecontrolplantwithaRCfilterplacedontheACsideofAPFisestablished.What’smore,thethesishasanalyzedhowPIparametersaffectthesystemofAPFandpointedoutthelimitationofsimplePIconditionerinactivefiltering.InordertoachievebettercharacteristicsinthesteadystateofAPF,thisthesishasproposedawayofaddingtherepetitivecontroltechnologytothedigitalcurrentloop.Detailedproceduresofdesigningeveryblockoftherepetitivecontrolleraregiven,andthesimulationmodelofanimprovedcurrentcontrollerwithPIconditionerandrepetitivecontrollerworkinginparallelispresentedinthisthesis.Thesimulationresultsareprovidedafterthat.IIIIntheend,experimentshavebeencarriedoutindifferentconditionswhicharediscussedinthisthesis,andtheirresultshaveprovedtheeffectivenessofthisdigitalcontrolmethod.Keywords:harmonicsuppressionreactivepowercompensationactivepowerfilterinstantaneousreactivepowerhysteresiscontroldigitalPIconditionerrepetitivecontrol_____111.1PowerElectronics,[1][2]-[5],401980SCRSCRSCRSCR80MOSFETIGBT2PWMUPSPWM[6][7][8][9]-[14]LC(ActivePowerFilter)APFPWM3[15]-[18]1.2(APF)1.2.11982APF800kVA20APFAPFAPF50KVA60MVAAPF,,APF,1.2.2APF1.1APFAPF490APFAPFAPFAPFAPFAPFAPFAPFAPFAPFAPFAPFAPFAPFLCLC1.151.2.3z[19]-[21]zFryze[22]zFFT6FourierFFTFFT[23]FFTz[24][25]zAkagiAPF[26]-[31]H.Akagi1984pqipiqdqpqipiqParkdqz7[32][33]z[34]1.2.4PWM[35][36][37][38]-[40]z,,,,,,z,,,z,,8DSPAPF1.2.5APFAPFAPF[41]-[46]1PWMAPF2MVAIGBTPWM5MVAGTO2APFLC3APF4APF1.39123PWMPICPIPIPI4PIPIPI5102APFLC2.1APF2.1APFVsAPFAPFPWMK2K1K1K2K1K2APFPCCPointofCommonCoupling2.1APFRLCHPFPWMpccVsiLici1K2KsV11PWMPWMAPFPWMAPFAPFLiLhi*ciciLLfLhiii=+2-1cLhii=−2-2sLcLfiiii=+=2-3LfiLhi2.1RCLHighPassFilter12HPF2.22.2.1APF[47]2.1APF2.1sVsiciAPFLicLiAPFcLcLiii=+APFAPF2.1APFHPFZ2.2K1K2isicLGp(s)isiL2.3LZsZ1K2KHPFZGLicLicisisV2.2APFLicLisici()pGs()iGs2.313RCL2.3Gp(s)APFHPFRCLGi(s)PWMGp(s)HPFAPFHPFAPFGp(s)2.4Gc(s)HPFGc(s)()iGs()pGs()cGsLicicLisi2.4()iGs()cGs()pGsLicLicisi2.514HPF2.52.2.2APF[48]2.1PCCPCCPCCPCC[49]15[48]2.3H.Akagi1984p-q[50]ip-iq[51]d-q[52]p-qip-iqp-qParkd-qaebeceaibiciαβ−32abceeCeeeαβ=2-432abciiCiiiαβ=2-532112122303232C−−=−2-62.616eαeβiαiβeiαβ−αβ2.6αβ−||eeeeeαβϕ=+=∠2-7||iiiiiαβϕ=+=∠2-8||||eieieiϕϕei2.6piqiiecospiiϕ=2-9sinqiiϕ=2-10eiϕϕϕ=−2-11pqepiqippei=2-12qqei=2-132-92-102-112-122-13cos()coscossinsinpeieieipeieieieieieiβααβϕϕϕϕϕϕ==−=+=+2-14sin()sincossincosqeieiieqeieieieieieiββααϕϕϕϕϕϕ==−=−=−2-15ieepieqeβααββα=−2-162-42-5pqaabbccpeieiei=++2-1717()()()13bcacababcqeeieeieei=−+−+−2-182-17[2][6]pq−pqii−dq−pqii−dq−zpqpq−pqLPFpqpqpqpq,,abciii,,afbfcfiii,,afbfcfiii,,abciii,,abciii,,ahbhchiiipp,,apfbpfcpfiii,,abciii,,abciiipq−[2]zpqii−18AaesintωcostωPLLpqiipqiipiqipiqi,,afbfcfiiipiqi,,afbfcfiii,,ahbhchiii2.7sincoscossinttCttωωωω−=−−2-19TCC=,32C2-623C32Cpq−2.7qiTC23C,,apfbpfcpfiii,,abciii,,abciii2.12.7APFpqii−sintωcostωzParkdq−dq−αiβipiqipiqifiαfiβafibiaicfibficiahibhichiae+++___CTC23C32CLPFLPFPLLcossin2.7pqii−19Parkdq−dq−50Hzdq−50Hzdq−2.8dq−~~dddadqqbqqpocoiiiiiiCiiiiii+===+2-2022coscos()cos()33222sinsin()sin()333111222ptttCtttππωωωππωωω−+=−−−−+2-21pCParkdq−TpC2-20didqiq~di~qid20qdqoLPFLPFdqoPIoi*dUdUdU∆aLibLicLiapibpicpiSqididdii~+qqii~+*cciaLibLicLi*aci*bci2.8PWMdrUdUPIdiSSS2.1APF2.4APF2.72.8LPF2.8dq−21LPFButterworthChebychevBesselElliptic[53][54]ButterworthEllipticChebychevButterworthBesselBessel[55]2.8didqiq~di~qidqAPFPark~di~qik22()(1)()()SkSkukukN=−+−−2-22S(k)u(k)u(k-N)u(k)u(k-N)S(k)S(k-1)u(k)u(k-N)S(k)kkNNN10kHz200DSP2.92.10Parkdq−dq2.10dq5711......Parkdq−2.10d-q:t(s);:i(A)2.9:t(s);:i(A)2357d