第4课-基本电路定律发电机

Section2CircuitElementsTherearetwotypesofelements(components)foundedinelectriccircuits:passiveelementsandactiveelements.BookP5Whatispassiveelements?Whatisactiveelements?ActivepowerandreactivepowerAnactiveelementiscapableofgeneratingenergywhileapassiveelementisnot.ResistorCapacitorInductorTransistorVoltageandCurrentsourceOhm’sLawstatesthatthevoltageacrossaresistorisdirectlyproportionaltothecurrentflowingthroughtheresistor.Theconstantofproportionalityistheresistancevalueoftheresistorinohms.Section3Ohm’sLawBookP10Kirchhoff'sCurrentLawisgivenbySection4Kirchhoff'sLawBookP14Kirchhoff'sCurrentLaw(KCL)statesthatthealgebraicsumofcurrentsenteringanode(oraclosedboundary)iszero.AnalternativeformofKCL:Thesumofthecurrentsenteringanodisequaltothesumofthecurrentsleavingthenode.Kirchhoff'sVoltageLaw:Kirchhoff'sVoltageLaw(KVL)statesthatthealgebraicsumofallvoltagesaroundaclosedpath(orloop)iszero.AnalternativeformofKVL:Sumofvoltagedrops=SumofvoltagerisesSomewords:(1)topology拓扑，拓扑学，拓扑结构Thetopologyofthenetworkmaybering,starorbus.网络的拓扑结构可以是环形的、星形的或总线形的。(2)Clockwise顺时针方向（的）；Counterclockwise逆时针方向（的）；Dothevanesinthefigurerotateclockwiseorcounterclockwise?图中叶片的旋转方向是顺时针的,还是反时针的?Section5BasicAnalysisMethods(CircuitTheorems)BookP185.1叠加定理(SuperpositionTheorem)5.2替代定理(SubstitutionTheorem)5.3戴维南定理和诺顿定理(Thevenin-NortonTheorem)5.4特勒根定理(Tellegen’sTheorem)5.5互易定理(ReciprocityTheorem)5.6对偶原理(DualPrinciple)NodalAnalysisMeshAnalysisSomewords:(1)wye-connectedY形连接，星形连接(2)delta-connected△形连接，三角形连接(3)be120°outofphase相位相差120度(4)Phasesequence相序positivesequence;negativesequence;zerosequenceBookP65Chapter4Section1PrincipleofOperationofanInductivemachineTheleft-handruleisapplicabletochargedconductormovinginamagneticfield,thatisapplicabletothemotor,whiletheright-handruleisapplicabletoanelectromagneticinductionphenomenon,thatisapplicabletothegenerator.Motorandgenerator同步电机(SynchronousGenerator)汽轮发电机-转速高、离心力大-隐极式non-salientpoledistributedpolar水轮发电机-转速低、极数多-凸极式salientpole同步电机的结构statorcorehydrogencondenserSlipring一、隐极同步发电机的基本结构fieldwindings汽轮发电机转子铁心的铣槽(Slotting)二、水轮发电机结构(Hydrogenerator,Hydroturbine)(1)立式水轮发电机(2)卧式水轮发电机VerticalhydrogeneratorHorizontalturbine(3)灯泡贯流式水轮发电机(bulbtubularturbinegenerator)10000kW水轮机转子水轮发电机模型三峡电站ThreeGorgeshydropowerstation发电机定子机座外径达21.4米，在工厂制造完成后，分数搬运至工地，吊入机坑焊接拼装。•定子绕组设计为三相双层波形绕组，每相5支路并联，共1080根罗贝尔线棒组成。绕组轮换数为1—8—14，每极每相槽数为9/4，节距为13发电机定子总装配发电机定子总装配三峡电站发电机转子是水轮机组中，整体吊装重量最重的部件，直径18米，重量超过1800吨，安装间隙只有3厘米。异步电动机(AsynchronousGenerator)异步电动机的定子是由机座、定子铁心和定子绕组三个部分组成。机座定子铁心定子绕组housingstatorcorestatorwinding