110KV变电所电气部分设计

I摘要为满足经济发展的需要，决定修建1座110KV盐北变电所。本工程初步设计内容包含变电所电气设计，新建的盐北变电所从110KV侧东郊变电所受电，其负荷分为35KV和10KV两个电压等级。通过技术和经济比较，现采用下列方案：内设两台三绕组变压器，电压等级为121/37.8/11。110KV进线采用内桥接线形式。本工程初步设计内容包括变电所电气设计。35KV和10KV配电装置同样采用单母线分段接线。所用电分别从10KV两端母线获得。在设计的过程中，综合考虑了各方面的因素，进行了合理分配，技术上符合各种标准，使该变电所能够安全可靠、灵活经济地向各用户进行输电。关键词：变电所主变压器短路计算设备选择IIAbstractForsatisfyingthedemandthateconomydevelopment,theauthoritiesconcerneddecidetoconstructaYanBeitransformersubstation.ThisengineeringfirststepdesigncontentsincludesthetransformersubstationofelectricDesign.Thenew-etupsaltaYanBeitransformersubstationobtainpowerformDongJiaosubstation(110KV).Therearetwokindsoflocalloadsinthesubstation,.Oneis35KV,theotheris10KV.Passthetechniquetocomparewiththeeconomy,adoptthefollowingschemenow:Therearetwothree-windingtransformersinthesubstation.Voltagegradeadopt121KV38.5KVand11KV.For110KVmainelectricalconnectionsshalladoptinsidebridgeconnection.The110KVenterstheline2return,Theadoptionbuildstrolleywire.For35KVand10KVmainelectricalconnectionsemploysinglesectionalizedbus.Auxiliarypowersystemgetpowerformthe10KVsectionalizedbus.Thisvitalpointchangestogiveorgetanelectricshockafactorforofdesign,synthesizingconsiderationeveryone's,proceedingthereasonableallotment,matchingeverykindofstandardinthetechnique,makingshouldchangetogiveorgetanelectricshockcansbesafeanddependableandvividtoproceedtoeachcustomertolosetheelectricityeconomically.Keyword:TransformersubstationMaintransformerShortcircuitcalculationTheequipmentschoosethetypeIII目录摘要.............................................................IAbstract........................................................II第1章绪论......................................................11．1选题意义................................................11．2国内外发展状况..........................................11．3原始资料分析............................................21．3．1原始资料..........................................21．3．2对原始资料的分析..................................2第2章变电所接入系统与地方供电系统设计..........................42．1变电所接入系统设计......................................42．1．1确定电压等级......................................42．1．2确定回路数........................................42．1．3确定110KV线路导线的规格、型号....................42．1．4110KV线路导线截面选择............................42．2变电所地方供电系统设计..................................52．2．135KV线路设计.....................................52．3．210KV线路设计.....................................5第3章变电所主变选择............................................63．1主变方案选择............................................63．2主变方案技术比较........................................63．3主变容量、参数选择......................................73．4主变方案经济分析........................................83．5主变110KV侧分接头选择..................................9第4章主接线设计...............................................104．1选择原则...............................................104．2110KV主接线设计........................................104．335KV主接线设计.........................................124．310KV主接线设计.........................................134．4110KV变电所一次主接线..................................13第5章短路电流计算.............................................14IV5．１选择短路电流计算点.....................................145．2短路电流计算的步骤.....................................145．3短路电流计算的相关数据参数.............................155．3．1发电厂发电机参数.................................155．3．2短路电流流经变电所的主变数据.....................155．4短路电流计算...........................................16第6章变电所电气设备选择.......................................176．1选择设备的基本原则.....................................176．2断路器的选择...........................................186．3隔离开关的选择.........................................196．4电流互感器的选择.......................................216．5电压互感器选择.........................................246．6避雷器的选择...........................................246．7主母线选择.............................................256．8消弧线圈设计...........................................25第7章继电保护配置.............................................267．1主变压器保护配置.......................................267．2母线保护...............................................277．3线路保护...............................................277．4纵联差动保护的整定计算.................................28第8章防雷规划.................................................338．1变电所防雷保护的特点...................................338．2避雷选择...............................................33第9章直流系统设计.............................................359．1直流系统的结构及接线...................................359．2电压监察装置...........................................379．3绝缘监察装置...........................................389．4闪光装置...............................................40社会经济效益分析................................................42结论............................................................43致谢............................................................44参考文献........................................................45附录1..........................................................46V附录2..........................................................48附录3..........................................................51附录4...............