335kv无人值班变电站的设计.

精品文档精品文档35KV无人值班变电站的设计摘要：本次设计以35KV站为主要设计对象，分为任务书、计算说明书二部分，同时附有1张电气主接线图加以说明。该变电站设有2台主变压器，站内主接线分为35kV、和10kV两个电压等级。两个电压等级均单母分段的接线方式。本次设计中进行了电气主接线图形式的论证、短路电流计算、主要电气设备选择及校验（包括断路器、隔离开关、电流互感器、电压互感器），同时介绍了防雷保护的配置、继电保护的规划等相关方面的知识。精品文档精品文档ABSTRACTThisdesignisthen35kVtransformersubstationsisforprimarilydesigntheobjecting,andisdividedintothemissionbook,calculationbook,manualthreepart,atthesametimefish-eye1electricitythelordconnectthelinediagramtotakeintotheelucidation.Thattransformersubstationestablishestohave2maintransformerofsets,standtheinsidelordtoconnectthelinetoisdividedinto35kV,with10twoelectricvoltagegradesofkVs.Theeachelectricvoltagegradedistinguishestheconnectingofsegmentthelinemethodwithsinglemother.Proceedsinthisdesigntheelectricitylordconnectthelinesketchthetype'sargument,short-circuitelectriccurrentcalculation,mainelectricityequipments(includetobreaktheroad,insulatetheswitch,electriccurrentwitheachother,electricvoltagetowitheachother),andintroducedtodefendwhatthunderprotecttoinstallatthesametime,aftertheprogrammingetc.thattheelectricityprotectthepartiesconcerned'sknowledge.Thispaperisa35KVsubstationdesignbook,includingassignmentpaper,explanationpaper,calculationpaperand1graphs.Thesubstationhave2primarytransformerincluding2voltagedegree:35KVand10KV.Everydegreeadoptedsectionedsinglebusprimaryconnectionmodeltosupplypower.Inthispaper,wehavecomputedshort-circuitcurrent,designedandtestedthePrimaryelectricequipment(circuitbreaker,isolationswitcher,currenttransfer,voltagetransfer,busetc),atthesametime,wealsointroducedprevent-thunderprotection,primaryprotectionandotherknowledgerelevant.精品文档精品文档目录ABSTRACT...............................................................................21绪论.............................................................................41.1原始资料和问题的提出...........................................................41.2国内外现状.....................................................................41.2.1国外无人值班变电站的发展.....................................................41.2.1国内无人值班变电站的发展.....................................................51.3本文的设计内容.................................................................52无人值班变电站的基础知识...........................................................62.1无人值班变电站的概念和功能.....................................................62.1.1无人值班变电站的概念.........................................................62.1.1无人值班变电站的功能.........................................................63主接线的选择........................................................................73.1常用的主接线方案介绍及其优缺点.................................................73.2本设计所选择的主接线方案及其选择理由..........................................83.3变压器的选型及台数.............................................................84短路电流计算........................................................................94.1短路计算的目的.................................................................94.2变压器等值电抗计算.............................................................94.3短路点的确定...................................................................94.435kv母线上三相短路时.........................................................104.510KV母线上短路计算...........................................................104.6短路电流汇总表................................................................115高压电气设备的选型..................................................................135.1高压电气设备选择一般规定....................................................135.1.1高压电气选择的一般原则......................................................135.1.2母线的选择.................................................................135.1.3高压断路器的选择及隔离开关的选择...........................................145.1.4互感器的选择................................................................166高压配电装置.......................................................................216.1配电装置简介及其优缺点......................................................216.2本设计所选择的配电装置及选择理由.............................................217二次设备...........................................................................237.1继电保护的作用...........................................................237.2变压器的保护..................................................................237.210kV母线分段断路器的保护.....................................................247.2馈线保护......................................................................247.3监控系统.....................................................................249通信系统............................................................................269.1常用通信方式介绍及其优缺点....................................................269.2本站所采用通信方式............................................................26精品文档精品文档第10章结论和展望参考文献致谢1绪论1.1原始资料和问题的提出本工程为满足某区域对电力的需求，经系统规划设计，论证新建一座35kV终端变电站。变电站安装两台3150VA变压器。电压分为35kV、10kV两个电压等级。35kV侧二回，一回进线，另一回供另一座远方35kV变电站。10kV最大负荷4500kVA最大一回负荷为1000KVA，最大负荷与最小负荷比为0.65，各侧功率因数COSφ及最大负荷小时数为：35KV侧Tmax=4200小时／年COSφ=0.85。查表损耗小时数T=2800小时10KV侧Tmax＝4500小时／年COSφ=0.8。查表损耗小时数T=3150小时35KV侧电源近似为无限大电源系统，以100MVA为基准容量，归算到本所35KV侧母线阻抗为0.2Ω本所环境要求:本所所在地地势平坦，交通便利、空气无污染。该地区最热月平均气温为28℃，年平均气温16℃