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1、电力系统基础知识17372（Basicknowledgeofpowersystem17372）I.compositionofanelectricpowersystemAcompletepowersystemconsistsofvarioustypesofdistributionaroundthepowerplant,thestep-upandstep-downsubstation,transmissionlinesandpowerusers,theyarecompleteelectricalproduction,voltaget
2、ransformation,powertransmissionanddistributionanduseofenergy.Two.Divisionofpowernetworks,powersystemsandpowersystemsPowernetwork:anetworkconsistingofpowertransmissionequipment,substationequipment,anddistributionequipment.Powersystem:powergenerationequipmentonthebasis
3、ofthepowergrid.Powersystem:Basedonthepowersystem,thepowerplantparts(suchasthermalpowerplantboiler,steamturbineandhydropowerplantreservoir,hydraulicturbineandnuclearpowerplantreactoretc.)areincludedinthesystem.Three.CharacteristicsofpowersystemoperationFirst,thetotala
4、mountofeconomyisbig.Atpresent,China'spowerindustryassetsizehasmorethan2trillion,accountedforatotalof1/4ofthestate-ownedassets,electricityproductiondirectlyaffectsthehealthydevelopmentofthenationaleconomy.Thetwoisatthesametime,alargenumberofelectricitycannotbestored,u
5、nitycomposedofallsectorscannotbeseparated,thetransitionprocessisveryrapid,instantproductionpowermustbeequaltothemomentforeveryaspectofpower,sothepowerproductionofthepowergeneration,transmissionanddistributionareveryimportanttotheuser.Thethreeisconcentrated,electricit
6、yproductionishighlycentralizedandunified,nomatterhowmanypowerplants,powercompanies,powergridmustbeunified,unifiedmanagement,unifiedmanagement;safetyproduction,organizationanddiscipline,occupationmoralityhasstrictrequirements.Thefourisapplicability,theserviceobjectofp
7、owerindustryisall-round,involvingallthepeopleinthewholesociety,powerquality,electricitypricelevelandtheinterestsofthevastnumberofpowerusersarecloselyrelated.Fiveisadvance,thedevelopmentofthenationaleconomy,electricitymustfirst.Four.RatedvoltageofpowersystemThereisale
8、velofpowergridvoltage,ratedvoltageisreasonableaccordingtotheneedsofnationaleconomicdevelopment,technologyeconomyandelectricalequipm
