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1、《电力工程》复习思考题与习题教材：《电力工程》，尹克宁，书号ISBN7-5083-2917-1oChapter1Introductiontopowersystem1・Pleaseexplainthefollowingterms:dynamicsystem,powersystem,andpowergrid,respectively・2.Pleasegivetheprimaryfeaturesofelectricpowerproductionandthebasicrequirementstopowersyst
2、em.3.Pleasepointoutthequalityindexesofelectricpowerproduction,andtheirpermissiblevariationrange・4.Listouttheapplicationsofdaily-loadcurveandannual-loadcurveinthedesigningandoperationofpowersystem.Chapter2steadystateanalysis1An180kmsingle-circuitthree-phas
3、elineisshowninthisfigure,withthefollowinglineparameters:rx=0.08^1/km;=OAQ./kmb}=2.7X10-65/km.Twostep-uptransformers(SFL—100000)thesending-endofthetransmissionline,、Pk二=700加，=96曲，UK%=n,/0%=1.9.Thepowerlineis150MW,withloadpowerfactorareparalleledinUiN/U2N=
4、13.8/242加,transmittedinthis0.8.5.Determinethevoltageandcurrentatthesending-end(high-voltageside),andthevoltagelossoftheline,accordingtotheshort-lineequivalentcircuit.6・Determinethevoltageatlow-voltagesideandactivepowerlossesofthetransfonner,accordingtothe
5、simplifiedequivalentcircuitofthetransformer.2Asimplepowersystemisshowninthefigurebelow,andthetransformerisratedby:SN=31.5MVA、PK=190Z3V,A/J=31加，UK%=10.5,厶％=0.7,withthelineparametersasfollows:r}=0.2IQ/kmx]=0.416Q/km;bx=2.74XIO-6s/km.Whenthevoltageofsendin
6、gendUA=120kV,solvefor(1)Thevoltagelossintransmissionlineandtransformer,respectively.(2)Thelow-voltageoftransformerandvoltagedeviation,whenthetransformeroperatinginitsratedratio3.Inasubstation,twostep-uptransformers(SFL—31500/110)areparalleledasshowninFig.
7、Eachtransformerisratedby:,PK=190Zav,=3UK%= .5.ThemaxloadpowerisSinax=40+j25MVA,withTnrdK=4500/?.Solvefortheenergylossofawholeyearinthissubstation.3.Whataretheresistanceandconductanceoftheoverheadtransmissionline?Isthereanydirectrelationshipbetweenthetwo
8、quantities?4.WhyitisnecessarytousebundledconductorsintheHVtransmissionlineat220kVandabove?5.Pleaseexplainthethreeterms:voltagedrop,voltageloss,andvoltagedeviation,respectively.6.Pleaseanalyzethefollowingtworelations
