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1、15春西交《电力系统综合实验》在线作业满分答案Orpeng15spring^comprehensiveexperimentonelectricpowersystem"onlineExamtime:100testtime:SingletopicselectionMultiplechoice(35questions,70points・)Intheimpedancerelayofthreeroundproperties,canmeasurethedistanceofthefaultpointandthef
2、aultdirection.AllimpedancerelayB.C.OffsetcharacteristicimpedancerelayFullmarks:2Theasymmetricalshort-circuitofanon-zerosequencecurrentis()Three-phaseshortcircuitTwophaseshortcircuitC.single-phaseearthingshortcircuitC.twophaseshortcircuitgroundFullmarks
3、:2Theshortdistancetransmissionlineisaffectedbythetransientresistanceofthelong-distaneetransmissionline0.A.smallB.bigAsC.Don，tbeaffectedFullmarks:2Themainequipment(adevice)thatmakesupthenetworkis()・A.transformer,userB.transformer,electricalwiringC.cable
4、s,overheadlinesResistance,capacitanceFullmarks:2Theconditionofsystemstabilityis()whenthesystemisstaticandstable,andthedampingcoefficientisapplied・A.D<0seq>0B.D<0seq<0C.Dseq>0<0D.D>0seq>0Fullmarks:2Thepre-acceleratedprotectionismainlyusedforthedirectdis
5、tributionofpowerplantsorimportantsubstationsA.35kvB.60kvC.110kvD.220kvFullmarks:2Theconnectionmodeofacompositesequencenetis()whenthesystemhasafaultintwophases・A.positivesequence,negativesequence,zerosequenceparallelB.Sequential,negativesequenceparallel
6、,zerosequeneenetopenA.Sequence,zerosequenceparallel,negativesequenceB.Zerosequence,negativesequenceinparallel,insequenceFullmarks:2Inthefollowingfaultform,symmetricalshort-circuitfaultisA.Single-phaseearthingcircuitTwophaseshortcircuitThree-phaseshortc
7、ircuitA.twoshortcircuitingthegroundFullmarks:2Oneadjustmentoffrequencyis()A.thespeedcontrolsystemofthegeneratorsetiscompleteB.ThefrequencymodulationsystemofthegeneratorsetC.bythefrequencyoftheloadD.itisdonebyareactivecompensationdeviceFullmarks:2Transf
8、ormerlongitudinaldifferentialprotectionistransformer()protectionA.themainB.abackupC.auxiliaryFullmarks:2Themostprobableshort-circuitfailureinthepowersystemis0Three-phaseshortcircuitTwophaseshortcircuitA.twophaseshortcircuitgroundB.Singl
