[理学]110kv变电站一次部分设计

《[理学]110kv变电站一次部分设计》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、论文题目：110kV变电站一次部分设计专业：电气工程及其自动化本科生：（签名）＿＿＿＿指导教师：（签名）＿＿＿＿摘要变电站是电力系统的重要组成部分，它担负着从电力系统中受电、经过变压，然后分配电能的任务。因此变电站的设计工作是整个工程环节的关键部分。电气主接线是发电厂变电站的主要环节，电气主接线的拟定直接关系着全厂电气设备的选择、配电装的布置置、继电保护和自动装置的确定，是变电站电气部分投资大小的决定性因素。本次设计某110kV降压变电站的一次部分，首先，根据主接线的经济可靠、运行灵活的要求选择各个电压等级的接线方式，在技术方面和经济方面进行比较，选取灵活的

2、最优接线方式。其次进行短路电流计算，根据各短路点计算出各点短路稳态电流和短路冲击电流，从三相短路计算中得到当短路发生在各电压等级的工作母线时，其短路稳态电流和冲击电流的值。最后，根据各电压等级的额定电压和最大持续工作电流进行设备选择，然后进行校验。【关键词】变电所；主接线；短路电流；断路器；变压器；防雷接地IVSubject:110kVtransformersubstationelectricalpartdesignSpecialty:ElectricalEngineeringAndAutomationName:LiJingwen(Signature）＿＿＿

3、＿Instructor:LiuQing(Signature)＿＿＿＿AbstractThesubstationistheimportanceoftheelectricpowersystemtoconstitutepart,itcarriestobesubjectedtoelectricityandpassbytochangetopress,andthenassignthemissionofelectricpowerfromtheelectricpowersystem.Sothedesignworkofsubstationisthewholekeypartof

4、engineeringlink.Electricitylord'sconnectinglineisthevitallinkofpowerplantsubstation,theelectricitylordconnectsalineardraw-uptorelatetothechoiceofthewholefactorieselectricityequipmentsdirectly,Thedecorationgoingtogetherwithelectricitydevice,afterelectricityprotectionandautomaticdevi

5、cereallysettle,isatransformersubstationelectricitypartinvestmentsizeofdecisivefactor.Thisdesignconstructsa110kVtodeclinetopressatransformersubstation,connectinglineareconomycredibilityandcirculatingavividrequesttochooseeachelectricvoltagegradetoconnectalinemethodaccordingtothelordf

6、irst,carryingonacomparisoninthetechniqueaspectandtheeconomicaspect,selectingbyexaminationsvividsuperiorconnectalinemethod.Carryonashort-circuitelectriccurrentcalculationsecondly,accordingtoeachalittlebitshort-circuitcomputeanatallpointandshort-circuitsteadystateelectriccurrentandsh

7、ortcircuittopoundatelectriccurrent,isbeenshortcircuitoccurrencetoworkineachelectricvoltagegradefromthreemutuallyshort-circuitcalculationsfemaleline,itthevalueofshort-circuitsteadystateelectriccurrentandpoundatelectriccurrent.End,accordingtothesumofeachelectricvoltagegradesettleelec

8、tricvoltageandbiggestkeepo