西交《电力系统分析Ⅱ》在线作业

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1、西交《电力系统分析II》在线作业The"powersystemanalysis11〃anyoneonlinehomeworkExamtime:100testtime:SingletopicselectionMultiplechoice(40questions,80points・)Thevoltagecenterpointis()・A:themainpowerplantbuslinethatreflectsthevoltagelevelofthesystemThemaintransfonnerofthe

2、voltagelevelofthesystemC.1or2D.motoroutputlineFullmarks:2Thesimplesystemstaticstabilitycriterionis()・A.>0B.<0C.=0A.allwrongFullmarks:2Theunitofthesynchronousrotormotionequation(pt-pe)istwounits・CurrentunitVoltageunitC.thevalue?PowerunitFullmarks:2Thecon

3、ditionofsystemstabilityis()whenthesystemisstaticandstable,andthedampingcoefficientisapplied・A.D<0seq>0B.D<0seq<0C.Dseq>0<0D.D>0seq>0Fullmarks:2Thesametypeofoverheadthree-phasetransmissionline,andtheinterphasedistanceincreasesthecapacitance()oftheline.A.

4、increaseB.decreaseC.thesameNotsureFullmarks:2Theneutralpointisnotdirectgroundingsystem,thesinglephaseshortcircuitfault,thenon-faultphasevoltageisupto()・ThelinevoltageofonehalfofAThelinevoltageof1/2squareofBThephasevoltageof1/2squareofc.3Thephasevoltageo

5、fonehalfsquaredofDFullmarks:2Thechangeperiod()ofthecoefficientofmutualinductancebetweenthestatorwindingintheABCcoordinatesoftheidealsynchronousgenerator・A.constantA.PI.B.2PI.C.3PI.Fullmarks:2Thevoltageattheendofthelineiscomparedtothestartingvoltagewhent

6、hetransmissionlineisrunning・A.riseB.thesameC.fallingNotsureFullmarks:2Inthefollowingfaultform,asymmetricshort-circuitfaultis().A.Single-phaseearthingcircuitTwophaseshortcircuitThree-phaseshortcircuitD.twoshortcircuitingthegroundFullmarks:2Thepurposeofus

7、ingasplittingconductoris()・ReducedreactaneeIncreasereactanceC.reducedsusceptanceIncreasingresistanceFullmarks:2Themainapplicationoftransientstabilityofsimplepowersystemisanalyzed.TheprincipleofmicroincreaseinconsumptionA.TheareaisfixedSmallinterferencem

8、ethodA.SymmetriccomponentmethodFullmarks:2Shortcircuitcurrentofthreephaseshortcircuitcontainsonly().NormalcomponentNegativesequencecomponentZerosequencecomponentD.thecomponentFullmarks:2Thetransientstabilityofsimplesystemisanalyz