三相绕线式异步电动机转子串电阻起动的MATLAB仿真

三相绕线式异步电动机转子串电阻起动的MATLAB仿真一、实验目的：设计三相绕线式异步电动机转子串电阻起动的MATLAB仿真模型，通过仿真观察三相绕线式异步电动机转子串电阻起动时电机有关参数的变化情况，进一步理解三相绕线式异步电动机转子起动过程。二、仿真模型：创建三相绕线式异步电动机转子串电阻起动的仿真模型如图所示。仿真模型中主要使用的模块（MATLAB7.10版本）：ACVoltageSource:理想交流电压源模块；Breaker：断路器模块；AsynchronousMachine:异步电机模块；MachineMeasurementDemux:电机测量信号分解模块;Selector：选路器模块；Gain：增益模块；Constant:负载常数模块；SeriesRLCBranch:单相串联RLC支路元件Scope：示波器模块Powergui:电力系统分析工具箱三、模型描述：电路连线结构如图L1、L2、L3接三相交流电源；QF为断路器；M为三相绕线式异步电动机；R为电机起动时串联的电阻。

四、模块参数计算及设置:Ua、Ub、Uc交流电压源参数：“Peakamplitude〃置为380,“Phase〃初相角分别置为0、-120、120，“Frequency〃频率置为60Hz。Ereaier(mask)(link)WhenitbecomeszerOjParameters0le-5SnubbercapacitanceCs(F):mfSwitchingtimes(s):■FunctionBlockParameters:MachinesMeasurementDemuxMachinemeasurements(mask)(link)signalisusedtothebreakeroperation,greaterthanzerotheclosesinstantaneously.BlockParameters:BreakerASnubberresistanceRs(Ohms):BrealierresistanceRon(Ohm)Ereaier(mask)(link)WhenitbecomeszerOjParameters0le-5SnubbercapacitanceCs(F):mfSwitchingtimes(s):■FunctionBlockParameters:MachinesMeasurementDemuxMachinemeasurements(mask)(link)signalisusedtothebreakeroperation,greaterthanzerotheclosesinstantaneously.BlockParameters:BreakerASnubberresistanceRs(Ohms):BrealierresistanceRon(Ohm):Whentheexternalcontrolmodelogicalcontrolbecomesbreakerthebreakeropensatthenextcurrentzero-crossing.ImplementsacircuitbreakerwithinternalresistanceRon.Ronisrequiredbythemodelandcannotbesettozero.Whenthesignal[0.01]Splitspecifiedsignalsofvariousmachinemodelsmeasurementoutputvectorintoseparatesignals.ParametersMachinetype:回Rotorcurrentsirairbire]□Rotor0Rotorcurrentsfluxes□Rotorvoltages|7StatorcurrentsOStatorcurrentsStatorfluxesStatorvoltages[y]Rotorspeed0ElectromagneticIIRotorangleir_Qir_d][phir_qphir_d][vr_qvr_d]iaibic][is_qis_d][phis_qphis_d][vs_qvs_d]WL]torque[Te][thetam.]radOKCancelHelpApply异步电动机测试信号分配器参数设置选路器参数设置Breaker(mask)(lxnk>Breaker(mask)(lxnk>Implements&circuitbreakerwithinternalresistaneeRon.Ronisrequiredbythemodelandcannotbesettozero.Whentheexternalcontrolmodeisselected,aSxwulinklogicalsi(nalxsusedtocontrolthebreakeroperation.Whenthesignalbeconesgreaterthanzerothebreakerclosesxn-stantsnoou^ly.Whenitbcco»oszerQjthebreakeropensatthen«xteurrentzero-crossing.Breakerresist&nceRon(Ohm):0.OOt|Znitialstate(0for*open*,1£or*closed*):SnubberresistanceRs(Oh»s):身FundionBlockP占『占伸醉Gam|1*^^G命Elaent-risegain(y=K.»u)orlatrii(y=K*uory：=u*K).lainSigiAttributes|Part就Attrit砒韬|Gain:6Q/(2*pi)|lultiplication:IElement(L*u),S辿)1莒tiie(-1forinherited):Ie-5催|Cancel曲昂]ApplySnubbercapacitance催|Cancel曲昂]ApplySwitchinetimes(s):单相串联蚤乌支路元件参数设置增益模块参数设置

昼BlockParameters:AsynchronousMachineS!Unrts.■I*■AsynchronousMachine(*ask)(link)*lapleventsathree-phaseasynchronousaachine(voundrotororsquirrelcage)nodeledinaselectabledqreferencefraae(rotor,stator,orsynchronous).Statorandrotorvindin^sareconnectedinwyetoaninternalneutralpoint.ConfigurationParaietersAdvancedINoamalpover,voltage(line-line),andfrequency[Pn(VA),Vn(Vras),fn(Hz)](3»746,380,60]Statorresistanceandinductance[Rs(oh>)Lls(H)]:(0.4352.Oe-3]=Rotorresistanceandinductance[Rr'(oha)Llr*(H)]:(0.8162.Oe-3]lutualinductanceLb(H):69.31e-3Inertia,frictionfactor,polepairs[J(kg.t*2)F(H.a.s)p()):(0.08902]Initialconditions[1,00,0,00,0,0]:Siwulatesaturation:SiwulatesaturationSaturationParaseters(Ans):vlfv2,...(VnsLL)]鼠笼式异步电动机参数设置其余参数均采用默认值。五、仿真参数选择及设置：对于所建模型，首先在主菜单【Simulation】下【ConfigurationParameters]设置模型参数里，选择算法Oder45，设置仿真开始时间为0,停止时间为0.5s其他设置取默认值。程序调试过程中遇到的问题和解决办法：仿真模型不能正确运行，解决办法：添加powergui模块使仿真能够运行;仿真时间太长，仿真不能完全运行；解决办法：修改仿真时间使仿真能够合理运行；仿真波形不正确

□aj耍北，电口用■回解决办法：修改仿真参数，得到正确的仿真波形。六、仿真结果：FileEditViewInsertToolsDesktopWindowHelplea*摸tfhbMFil□转子电流irDesktopWindowHelp定子电流is豪□aj耍北，电口用■回解决办法：修改仿真参数，得到正确的仿真波形。六、仿真结果：FileEditViewInsertToolsDesktopWindowHelplea*摸tfhbMFil□转子电流irDesktopWindowHelp定子电流is豪EdhViewJnMrtTodsDtshof)NMor哗转速n七、仿真结果分析：由图可见，经0.1s将电阻短接后，电机在波动的电磁转矩Te作用下，使用其他电力系统分析工具对仿真结果进行分析(1)Powergui中LoadFlowandMachineInitialization对三相电机初始化:MaGrjirwsKwidilowLoaditowfrecpJBncy[xLqimIih^wMaGrjirwsKwidilowLoaditowfrecpJBncy[xLqimIih^winrtiHlcorxlrtiQn：AuloMcchEwrucalpgw^F(Waftts];1.492e*00€updateLoadFlow⑵Powergui中GenerateReport生成报表SimPowerSystemsReport.generatedbypowergui,05-May-201507:34:37Model:C:\Users\Administrator\Desktop\untitled4.mdl.[1]Steady-Statevoltagesandcurrents:Statesat60Hz:Measurementsat60Hz:Sourcesat60Hz:3.8000e+002V-120.00ja>3.8000e+002V0.00ja>3.8000e+002V120.00ja--->Nonlinearelementsat60Hz:0.0000e+000V0.00ja--->0.0000e+000V0.00ja--->0.0000e+000V0.00ja--->0.0000e+000V0.00ja--->0.0000e+000V0.00ja--->0.0000e+000V0.00ja--->0.0000e+000V0.00ja--->Units0.0000e+000V0.00ja--->Units6.5818e+002V30.00ja--->Units6.5818e+002V-90.00;a--->

U_UbU_UaU_UcU_BreakercU_BreakerbU_BreakeraU_BreakerCU_BreakerBU_BreakerAU_AB_rotor:AsynchronousMachineSIU_BC_rotor:AsynchronousMachineSIU_AB_stator:AsynchronousMachineSIU_BC_stator:AsynchronousMachineSIUnitsNONLINEARELEMENTS(systeminputs)0.0000e+000A0.00ja>I_Breakerc0.0000e+000A0.00ja>I_Breakerb0.0000e+000A0.00ja--->I_Breakera0.0000e+000A0.00ja--->I_BreakerC0.0000e+000A0.00ja--->I_BreakerB0.0000e+000A0.00ja--->I_BreakerA0.0000e+000A0.00ja--->I_A_rotor:AsynchronousMachineSIUnits0.0000e+000A0.00ja--->I_B_rotor:AsynchronousMachineSIUnits0.0000e+000A0.00ja--->I_A_stator:AsynchronousMachineSIUnits0.0000e+000A0.00ja--->I_B_stator:AsynchronousMachineSIUnits[3]MachineLoadFlowsolution:Machine:AsynchronousMachineSIUnitsNominal:2.238kVA380VrmsBusType:AsynchronousMachineUanphase:0.00jaUab:465.4Vrms[1.225pu]30.00jaUbc:465.4Vrms[1.225pu]-90.00jaUca:465.4Vrms[1.225pu]150.00jala:0Arms[0pu]0.00jaIb:0Arms[0pu]0.00jaIc:0Arms[0pu]0.00jaP:0W[0pu]Q:0Vars[0pu]Pmec:1.492e+006W[666.7pu]Torque:7.9153e+006N.m[6.