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1、电力系统基础知识科普(Basicknowledgeofpowersystemsciencepopularization)1.divisionofpowersystems,powersystemsandpowergridsPowernetwork:anetworkcomposedofsubstationsandtransmissionlineswithdifferentvoltagelevels.Powersystem:anetworkcomposedofpowergenerationequipment,transmissionequipmentandpowerequipment.Power
2、system:asystemthatincorporatesthepowerpartofapowerplantonthebasisofanelectricpowersystem.2.characteristicsofpowersystemoperationOperationcharacteristicsofpowersystem:Alotofelectricitycannotbestored;unitycomposedofallsectorsareindivisible;thetransitionprocessisveryrapid(afewhundredthsofasecondtoafe
3、wtenthsofasecond);powersystemregionalstrongfeatures;ratherstrictrequirementsonpowerquality;verycloselywithallsectorsofthenationaleconomyandpeople'slife3.basicrequirementsforpowersystemoperationToensurethereliabilityofpowersupply:toreducepowerloss,requirethecomponentstohaveenoughreliability,toimpro
4、vethestabilityofthesystemoperationEnsuregoodpowersupplyquality:voltage,frequency,waveformImprovingtheeconomyofpowersystemoperation:reducingenergyconsumptionTypeof4.powerplantTypesofpowerplants:Conventionalpowergeneration(majorformsofpowergeneration):thermalpowerplants,hydropowerplants,nuclearpower
5、plantsNewenergypowergeneration:geothermalpowerplants,tidalpowerplants,windpowerplants,solarpowerplants,marinepowergeneration,magneticfluidpowergeneration,hydrogenpowergeneration,nuclearfusionpowergenerationNeutralgroundingmodeof5.powersystemFourneutralgroundingmethods:(thefirsttwobelongtosmallcurr
6、entgrounding,thelattertwobelongtohighcurrentgrounding)Neutralpointisnotgrounded;neutralpointisgroundedthrougharcsuppressioncoil;neutralpointisdirectlygrounded;neutralpointisgroundedthroughresistanceTheapplicationof6.dayloadcurveandannualmaximumloadcurve.Dailyloadcurveisveryimportanttopowersystem.I
7、tisanimportantbasisforarrangingdailypowergenerationplan,determiningthepowergenerationtasksofeachpowerplantanddeterminingthesystemoperationmode.Thedailymaximumloadisnotthesame,usuallyattheendoftheyear,theendofthey