某66kv智能变电站设计

摘要作为智能电网的核心枢纽，智能变电站肩负着连接高压电网电源输入和各种新能源接入的重要使命，同时还需要完成连接变电站和大用户的电源分配，以及接收上级调度中心信息传递、自动控制、智能调节和在线分析等多种功能。智能变电站能够对电能进行有效管理与控制，提高了电力系统运行的可靠性，减少了设备故障发生几率。随着我国社会经济的蓬勃发展，对电力的需求日益增长，智能变电站已成为未来电力系统中不可或缺的重要组成部分。目前，世界上许多国家都在积极研究建设智能化变电站，并且取得了很大成就。因此，未来变电站的发展趋势将趋向于智能化，这将成为主流趋势。本文完成了某市66kV智能变电站二次系统的设计，并进行了智能化二次设备的选型，将站内公用、66kV及主变间隔的间隔层设备布置于Ⅱ型预制舱内，同时舱内设备采用了前接线前显示装置，实现了预制舱式布置的设计理念。关键词：智能变电站隔离式断路器电流互感器标准预制舱AbstractSmartsubstationisanimportantfoundationandsupportofstrongsmartgrid.Itislocatedinthecentralhubofthewholesmartgrid.Itreceivesthepowerinputofhigh-voltagepowergridandtheaccessofvariousne wenergyfromthetop.Itshouldcompletethepowerdistributionofconnectedsubstationsandlargeusers.Atthesametime,ithasthefunctionsofinformationtransmission,automaticcontrol,intelligentregulationandonlineanalysisfromthesuperiordispatchingcenter.Therefore,intelligentsubstationwillbethedevelopmentdirectionofsubstationinthefuture.Firstly,thedemandanalysisandoverallplanningarecompleted,andtheoveralldesignschemeandsystemaccessschemearegiven.Onthebasisofmeetingthegeneraldesignspecificationsandmeetingtherequirementsofthenewgenerationofintelligentstation,combinedwiththelocaloperationconditions,theoverallintelligentlevelofthesubstationisimprovedbyselectingnewintelligentequipment.Thentheprimarysystemof66k Vintelligentsubstationinacityisdesignedandtheequipmentselectioniscarriedout.Combinedwiththecurrentsituationofequipmentdevelopment,the66k Vcircuitbreakeradopts SF6columnintegratedintelligentisolationcircuitbreaker,integratedcircuitbreaker,electroniccurrenttransformer,outgoingsidedisconnectorandgroundingswitch;Other10k Vbaysarenotequippedwithindependentintelligentcomponents,andmulti-in-onedevicesintegratingprotection,measurementandcontrol,assessmentandmeasurementandotherfunctionsareadopted.Finally,thesecondarysystemof66k Vintelligentsubstationinacityisdesignedandtheintelligentsecondaryequipmentselectioniscarriedout.Thecompartmentequipmentofpublic,66k Vandmaintrans formerBayinthestationarearrangedintypellprefabricatedcabin.Theequipmentinthecabinadoptsfrontwiringfrontdisplaydevice,whichrealizesthedesignideaofpre fabricatedcabinlayout.Keywords:Intelligent SubstationIsolatedCircuitBreakerEquipmentSelectionIEC61850StandardPrefabricatedCabin目录目录摘要.…Abstract-........SI第一章绪论1.1选题背景及意义11.1.1选题背景1.1.2选题意义21.2国内外发展状况21.2.1国外现状21.2.2国内现状313主要的研究内容。.4第二章智能变电站设计背景….52.1智能变电站技术特征2.2智能变电站网络结构.62.3工程建设背景及工程规模723.1工程建设背景….72.3.2电网现状简介.72.3.3负荷特性分析….82.3.466kV层面变电容量需求.923.5变电站建设规模.92.4本章小结...10第三章电气一次系统设计113.1电气主接线选择，.113.1.1传统接线形式。…l13.1.2电气主接线方案技术113.1.3接线方式…133.2电气设备选择的一般条件......143.2.1按正常工作条件选择143.2.2按短路条件校验153.3变电站主要设备选择1633.1主变压器选型1633.2设备选择.173.3.3设备.1933.4一次设备智能化方案.….203.4隔离式断路器设计方案.203.4.1隔离式断路器的定义和特点.203.4.2隔离式断路器的功能集成213.4.3隔离式断路器对于配电装置的优化223.5绝缘配合和过电压保障…223.5.1设备绝缘配合及过电压保护原则.22