(完整word版)基于MATLABSimulink的电力系统仿真实验.docx

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1、基于MATLAB/Simulink的电力系统故障分析IOkv系统三相短路分析三相短路（以中性点不接地系统模型为类）模块搭建：三相短路各元件参数设置如下:gBlOCkParameters:TheePhaseSoUrCeThree-PhaseSOllrCe(nasklink；7hrGG-phasVOItaZGSoUrCGinSGrieKWithRLbxanch.ParntsPhasetO-PhaSGsvoltaG(V):110.5e3PhaseanrlGfchaseA(degreGs):lFrtQutncy(HX):同InternalConn,action:YSPeCifriaped&nceUSX

2、nSSh-XtvCirCUitIeVeISoUreeresistance(Oh=Si:IO.009SoUrCeinductance(H):-116.58e-5-AITlrOKCancelHelpIIIBlOCkParameters;LinelIS-Three-PhasePZSeCtiOnLin已口a5%(Iink)ThiBblockinpleaentsathrt-phi.iPIsectionlintoXePreStitathiGG-phasGtransaisionline.ThigblockiGDresentsOnlyOnGPlsection.TOInplenente2orethatOnePI

3、SeCtiPnJyousiDlrneedtoCanneCtCOPieaQfthisblockinsexiesParaaQtQTSFreQUenCyUeeclforRLCspecification(Hz):F*PoIitiVe-Indzo-seauceresiBtances(0haska)K：RO:I0.012730.3SG4：Positive*andZeroeSGauencOinductances1)LILO:IT0.9327e-34.1264e-3PCSitiV-and4ro-ssau4neeca-pacitanees(FJka；IeICOI:I12.74e-97.751e-9LineSee

4、tiOnIGnSth(ka:.1130OKCanCeIKeIPApplyBlockParameters;Load4Tixice-PfcaseSeesRLCLoadaask(Iixlk)ZsDl3ntariecRLClead.Pajastt10e3Soainalfeuencyfn(Hz):lsActivtDorP(I):5ZnductlvereactivePOgrQL(positivecar):I5CaoaeitivereactivepwerQe(nerativa*):I5MeasuresentsIXone0BlockParameters:V-IThxee-PhaseVyeasureaent(B

5、a(link)Thisblockisusedtoseasurethree-phasevoltagesandcurrentsinacircuit.Whenconnectedinseriesithathree-phaseeIeaentfitreturnthethreepha-tofroundvoltagesandlincurrentB.Thtblke&noutputthtvoltteesandeury4nt8in.perunitvaluesyinolttAndamperes.Checkthe&pDropxiatebozesifyouranttooutputthevoltagesandcurrent

6、sin.DUPaaaet4r5Vltaceaeasure3ntphastophase7UceilabelSignal(usaFzqstolocktocollctthisinaL)S.VbcVoltaceinPUCuxrnt3tasuultlfult B Ih*ec-7hasc F nlVl au2V C IhtraA 7 FArJItIZFAalt ANPIeIEd MeaSULoiaLftlRLocaltaesareencIOSedinbrackets.,andSeODedtagna=esareSneIOSedinbraees；J).OKCanCaIIEelD)WFUnCtiOnBIOCkP

7、araneters;AddlCu,AcldcrsubtractXnPUtS-SCIfTCneOithefol.ovng:a) stringCOntainingor-foreachInPLtport,forSPaCerIeITefllPortS(e.c.一Db) SCalar)Avalue1SUalallinputs:1SUnlltstsOfatingleInPLtvctorMainISifnftIdatatypaICOnshae:re:l&ngulaxLIStOfKXeni:I*.SaSDlet-n*1forIEherXted):l,XICancelIHeIDIAppb一EroLJ.RckWi

8、ththespecifiedtar-Ifthttaeisdfi4dseoped,intheGotcMceltthenaGOtO7arVigibilitybloekustbeUSGCltodefinetheVigibilityOfthetag.After,UpdateDiaeraIDj：theblockicondisplaystheSeIeCtedtagnaze(IOCaItagsareenclosedinbrackets,andSCQPedtagnazesaxeenclose!inbraces：)OKCancelIHelp.1FUnCtiOnBlOCkParameters:DiSCrete3P

9、haScSeqUeflCeAnalyZcr2_K_一Diet3-PhESneAnly(linkThisdiscreteblockoutputsthpoitiv-1nfativ-.zro-orallBuaccoaponent(s)(3(anitudandPhase)ofastofthreebalanced.orunbalancedienfi.licaaycontainharaonics.ThethreeseQuenceCOSDanent3areCoaputedasfolllows:Vi=1/3*(Va*Vb2*Vc)V2-1/3(V-2aVc)VO=1/3TI*Vb，VC)rhrt;Va.-Vb

10、,Vc=inputphasersatfrqucyazxp(J*2pi3)=1*120dg.coaplxcpratorThtinputcontainsthtvctorixdiEalofthtthreeVaVbV,ciinutoida.1sicn&lsOutputoneandtwogiverespectivlytheaastudepeakvalu*)andphasedecprecs.cthespecxcdUeQUUtloeoosponcn(e).ForthefitcycleofSisulation,theouputsareheldconstanttthevaluesspecifiedbythepa

11、rameter*nitialinput*.Faa=etejs三相短路仿真波形如下:如图1a、b、c三相短路电流仿真波形图分析：正常运行时，a、b、c三相大小相等，相位相差120度。发生三相短路时，a、b、C三相电压全如图2一一线路1的零序电流分析：在没有故障时，没有零序电流，突然出现故障时，零序电流为故障电流的3倍，为31如图3线路1的零序电分析：在没普故障时，没有零序电压，突然出现故障律电需为故障电压的3倍，为如图4一一线路1的故障相电如图5线路3的零序电流如图6一一线路3的短路电流如图7一一三相对称电源电压如图8一一线路2的零序电流分析：在没有故障时，没有零序电流，突然出现故障时，零序电流为故障电流的3倍，为310。如图9一一三相对称电源电流如图10一一三相对称电源零序电压如图11一相短路电流IOkV系统两相短路分析仿真模块搭建同三相短路，只有三相故障模块参数改变如下：注：a、b两相短路mtr:THr-PfyFltlJznrQa-Riia,ZGFUcgtn;Udcu飞ol2sx)prexaaruXcto-crcut)o-ooccroundYOMeandefinetHfaultniandalocboxoxapolanexternal.Ia1.KxrnolOonatx。！t。工，tHeaxnalcontrol7OprasaaFauixPtiasaDFault