电气讲义(改)

1TableofContentsChapterIIntroduction......................................................................................................................31IntroductiontoWASSITpowerplantelectricalsystem..............................................................32Overviewofelectricalsystem.........................................................................................................33OperationModefor400kvand132kvSystems............................................................................54Operationmodefor6kvstationservicesystem............................................................................65Operationmodefor400vplantservicesystem.............................................................................86ThewholeplantDCpowersystem..............................................................................................127Uninterruptiblepowersupplysystem.........................................................................................15ChapterIIelectricgenerator..........................................................................................................181Maintenanceforoperationandmonitoringofgeneratorinnormaloperation......................182Operationmodeofvoltage,frequencyandpowerratechange................................................28ChapterIIItransformer..................................................................................................................291Workbeforeputtingintooperationofthetransformer............................................................292Puttingintooperationandswitchingoffofthetransformer....................................................313Operationalmaintenanceofthetransformer.............................................................................334Transformeroperationregulations.............................................................................................375Coolingsystemofthedry-typetransformer...............................................................................40ChapterIVdirectcurrentsystem...................................................................................................421Monitoringofthecharger............................................................................................................422Inspectionofstoragebattery........................................................................................................433TheinspectionandpatrolofDCdistributionpanel..................................................................44ChapterVUPS.................................................................................................................................4521IndicationandoperationunitofUPSdevice..............................................................................452UPSoperationmode.....................................................................................................................483InspectionduringUPSsystemoperation....................................................................................56ChapterVIpowerdistributionunit...............................................................................................561Thegeneralrequirementsofpowerdistributionunit................................................................562Busbarandswitchblade...............................................................................................................583Switch.............................................................................................................................................613ChapterIIntroduction1IntroductiontoWASSITpowerplantelectricalsystem1.1Centralizedcontrolincludesgenerator-transformerunit,highvoltagetransformer,start-upstandbytransformerandeverystationservicetransformer,bussystemwith6KVand400Vvoltagegrades,systemwith220VdirectcurrentandUPSsystem.1.2Networkcontrolincludes400KVand132KVsystem,systemwith110VdirectcurrentandUPSsystem.2Overviewofelectricalsystem2.1Mainwiringof1400kVsystemis3/2wiringmode.400kVsystemswitchadoptsLW25-420/Y4000-50high-voltageACceramiccolumnSF6circuitbreakerproducedbyXi’anXidianHighVoltageApparatusCo.,Ltd.Monitoringandcontroloperationfor400kVsystemequipmentisrealizedbycomputermonitorsystemNCS.2.2132KVmainwiringmodeissectionalizeddouble-busconfiguration.132kVsystemswitchadoptsLW25A-145high-voltageACceramiccolumnSF6circuitbreakerproducedbyXi’anXidianHighVoltageApparatusCo.,Ltd.Monitoringandcontroloperationfor132kVsystemequipmentisrealizedbycomputermonitorsystemNCS.2.3Thefirstseriesandsecondseriesof400KVsystemareconnectedwith132KVA/Bbusbytwointerconnectingtransformers(three-phaseoil-immersedforcedaircooledauto-transformerwithon-loadtapchanger,thecapacityis250/250)respectively.2.4Onemaintransformerissetineachunit(three-phaseoil-immersedforcedaircooledtransformerwithno-loadtapchanger,thecapacityis400MVA),onehighvoltagetransformer(three-phaseoil-immersedaircooledtransformerwithno-loadtapchanger,thecapacityis31.5/20-20),andonestart-upstandbytra