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1、无功变化理论分析（Theoreticalanalysisofreactivepowerchange）Theoreticalanalysisofreactivepowerchange(1)analysisoftheangleofthepuremotor:Thefirstmethodusestheprincipleofarmaturereactionareanalyzed,ifyouignoretheexcitationregulatorofsynchronousmotor,inthe"science"oft
2、hemotorarmaturereactionsectionismentioned,increasereactivepower,activepowerisconstant,increasingtheactive,reactivepowerbecomessmall.Thisisbecause,iftheexcitationisconstant,thentheincreaseinactive,excitationfortheq-axisarmaturereactiononthepartofmany,becau
3、setheactivepowerisontheq-axisarmaturereactionofmotortorealize,soforpartofthedirectaxisarmaturereactionisless,andthereactivepowerisdirectaxisarmaturereactiontoachieve,thistimewithactivereactivepowerwillbereduced,ofcourse,wouldbeappropriatetoreducethevoltag
4、e.Isequaltothefixedexcitationcurrentsomuch,orasacrossaxisreactiontoachieveactive,eitherasadirectaxisreactiontoachievereactivepower,activeinCanada,ACexcitationwithmultiaxisarmaturereaction,thentheexcitationtodirectaxisarmaturereactiontoachievereactivepower
5、onthepartofless.Therefore,duetoarmaturereaction,increasingtheactivepowerwillleadtodemagnetization,resultinginthegeneratorlessmagnetic,reactivepowerreduction,voltagereduction.Thesecondmethodusesthechangeofgeneratorpowerangletocarryontheanalysis,thepremisei
6、sthesameexcitationconstant,thegeneratorcansendreactivepowerandreactivepowerandvoltagesentmuchdifferenceU,thevoltagedifferenceUreferstothepartofthephasevoltageofthegeneratorterminalvoltageandelectricpotentialE0UN,attentionisthevoltagephasepartofthedifferen
7、ce,specificreferenceto"science"inthesynchronousgeneratormotorlatephaseoperationwhenthephasordiagram,ThephasordiagramtakesthegeneratorterminalvoltageUNasareferencephasor,thatis,NUisaverticalupwardarrow,whichremainsstationary.TheelectromotiveforceE0isonthec
8、ounterclockwisesideoftheUNarrow,andisanarrowwithalengthgreaterthanUN.Anangleisformedbetweenthetwo,i.e.,thegeneratorpowerangle.ThepartofthevoltagephasedifferencereferstotheamountofUNorE0toreferencearrowisaprojectiono
