Matlab运用Multimeter分析电压器的一次侧相电压

1、运用Multimeter分析电压器的一次侧相电压、主磁通、空载电流波形要求：一台Y-D11连接的三相变压器，P=180kVA,VV=10000V/525V。已知n1n2nR=0.4，R=0.035，X=0.22，X=0.055，R=30，X=310，铁1212mm芯饱和特性曲线的拐点为磁化电流,磁通;=0,0;0.59737,1;1.5,1.2。分析电压器的一次侧相电压、主磁通、空载电流波形。改变变压器的接线方式，分析结果。1.理论分析。空载时，由于变压器铁芯饱和，因此当相电压和主磁通是正弦时空载电流为尖顶波，其中将含有较大的三次谐波和一系列高次谐波。但是，因为三相变压器采用Y连接，一次侧空载

2、电流中三次谐波无法通过，又因为五次以上的谐波电流很小可忽略不计，所以侧电流近似正弦波。由一次侧空载电流产生的主磁通波形为平顶波，其中含有的三次谐波磁通分量在二次绕组的闭合三角形中产生三次谐波环流，此环流将削弱主磁通中的三次谐波分量，因此空载电流、主磁通及其感应的电动势均接近于正弦。2.仿真电路搭建powec|ijinode10A3DB-node10rbDB-cnode10uYAc0B-Three-PhaseTransformerfTwoWindingsi3.元件提取元件路径三相双绕组变压器SimPowerSystems/Elements交流电压源va、Vb、VcSimPowerSystems/

3、ElectricalSources中性点模块node10SimPowerSystems/Elements外用表模块MultimeterSimPowerSystems/Measurements信号分离模块DemuxSimulink/SignalRouting接地GroundSimPowerSystems/Elements示波器ScopeSimulink/Sinks4.参数设置变压器模块II0=RR1*1*PnnLR2Im*nRm2L1V2tn2兀L2*V22ParametersAdvaaoedParanetexsAdvancedD&Lta(D：SaturablecoreSiiaulatehyEt

4、exeEiEMeaELLiezienteAll01078J_=.-.m*IC.arLselBlockParaeters:Three-PhaseTranJThree-PhaseTxanaformer(TwoWindings)(mask(ThisblockinplEzsentsathree-phaset:ransfo-rzsersingle-phaset:ransfo-rzsere.Setthewinding:Dc-nnwhenyuvranttoaccesstheneutralpointofthClicktheApply口工theOKbuttonafterachangeo-puptoconfirz

5、Dtheconvereionofparanetere.ClicktheApplydttheOEbuttenaftezachangetatheUnitsospuptassnfixzitheDonveTsicnofparazietexs.Thisblocki3ple=ientsathree-phasetxansfaxzs&Tbyusinthreesingle-phasetxansfax=i6TS.SettheindinsciuiectisntaYnhenycuxanttoaccesstheneutralpointoftheITye.Three_Fh.aseTransformer(TwoWindin

6、gs)(mask(link)BlockParueters:Three-PhaseTransformer(T.|X|L0.0022,LV2nnnnnUnitspuvNoziinalps-wexandfrssiuEncyPn(VA)fn(Hz)ZLE3t3:50zindin1parbidstexeVlPh-Ph(Vrzis4R1(pu)4Ll(pu)ZL0e3:Z.C02Z:Z.ZZ二Zindin2parar)eteTEV2Ph-Ph(Vtejs)4R2(pu4L2(puZ5Z5:Z.CcEc:Z.LC7EZMagnetizationxesietanseRzs(pu0.12MaTietizatic

7、nindu:Rnc-&(pu).0012,RL0.0686,2*V2laturaticn.charao-_i.1：phiLi.2:phiZ:._(puiQCZ.53737.二P.民二.左Initialfluz&z:phiCjphiOE-:phiC:(pu:0.162,Lm1.674Confiffuratic-n交流电源模块VAVB、VC各自滞后120，自己设置。外用表模块Multimeter示波器Scope5.仿真算法为ConfigurationParaeters:tongbu/Configuration(Active)Select:?Solver?-Datat/Ezc-oxt;Optiziization-Diag：nostiDS?SazapleTizser-DataValidityTypeC-onve-TsionjC-DimeDtivityiCc-ZDpatibi1ityjM-edelFefeTencinSaving:iEardareImplEZientation?ModelRefexencinE：-SiaulaticnIarget；Syzih-olE:-Cust-DZiC-ode-Real-TizieDxkshDpiKepoTt:Cazaents?Syzih-olEi-ust-czi