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1、毕业设计题目：330kV变电站电气主接线系统设计摘要变电站是电力系统的重要组成部分，它直接影响整个电力系统的安全与经济运行，是联系发电厂和用户的中间环节，起着变换和分配电能的作用，在全国电网中占有特别重要的位置。对变电站进行合理的规划和科学的设计是保证供电质量的前提和基础。本设计为330kV变电站设计，330kV变电站设计最终为3台主变压器，首期投产建设1台。综合考虑工程初期和长期运行的费用，追求设备寿命期内最优的经济效益，分为主变压器选择、主接线技术经济比较、短路电流计算、电气设备的选择等几部分，同时附有电气主接线图等图纸加以说明。站
2、内主接线分为330kV、110kV、和35kV三个电压等级；各个电压等级分别采用双母线、双母线和单母线的接线方式；短路电流选取三个电压等级处为短路点进行计算，并介绍了短路电流的危害和产生原因；在电气设备的选择上以各种元器件参数选择为主。此外，还对导线、绝缘配合、过电压保护等方面进行了简单的设计，使变电站电气一次部分基本完成。关键词：330kV变电站主变压器短路电流电气主接线AbstractSubstationisanimportantpartofthepowersystem,whichdirectlyaffectstheentirepo
3、wersystemsecurityandeconomicoperation.Itistheintermediatelinkscontractingtheusersandthepowerplants,andithasthefunctionoftransformationanddistributionofelectricenergy,whichplaysaparticularlyimportantroleinnationalpowergrid.Reasonablesubstationplanningandscientificdesignis
4、toensuretheprerequisiteandbasisforpowerquality.Thedesignisforthe330kVsubstation,thesubstationisfinallyadesignof3setsofthemaintransformer,onesetwillbecurrentlyputintobuilding.Consideringtheengineeringcostsoftheinitialandlong-runningperiodtopursuitthebesteconomicinterestdu
5、ringtheusetimeoftheequipment,thisdesignisdividedintofollowingparts,themaintransformerselection,mainconnectiontechnologicalandeconomiccomparison,shortcircuitcurrentcalculationandselectionofelectricalequipments,accompaniedbydrawingsofmainelectricalwiringdiagramtoillustrate
6、this.Themainterminalstationisdividedintothreevoltagelevel,330kV,110kV,and35kV;Variousvoltagelevelsisrespectivelydividedintodualbus,dual-busandsinglebusterminals;Selectpointswhichisatthreevoltagelevelsfortheshort-circuitcalculations,anddescribethecausesandharmofshort-circ
7、uitcurrent;Themainpointoftheselectionofelectricalequipmentistochoosethemainparametersofthevariouscomponents.Inaddition,shewillputupwiththesimpledesigntheofwire,insulationcoordination,overvoltageprotectionandgroundingaspects,sothatthedesignofthefirstpartofanelectricalsubs
8、tationwouldbebasicallycompleted.KeyWords：330kVsubstationmaintransformershortcircuitcurrentcalculationma
