220-60KV降压变电所毕业设计

沈阳工程学院毕业设计（论文）I内容摘要电气工程及其自动化专业的毕业设计是培养学生综合运用大学四年所学理论知识，独立分析和解决工程实际问题的初步能力的一个重要环节。本设计是根据“电力系统及自动化专业（发电厂及电力系统）”毕业任务书的要求，综合大学四年所学的专业知识及《电力工程电气设计手册》，《电力工程电气设备手册》等书籍的有关内容，在指导教师的帮助下，通过本人的精心设计论证完成的。整个设计过程中，全面细致的考虑工程设计的经济性，系统运行的可靠性，灵活性等诸多因素，最终完成本设计方案。本设计说明书是根据毕业设计的要求，针对220/60KV降压变电所毕业设计论文。本次设计主要是一次变电所电气部分的设计，并做出阐述和说明。论文包括选择变电所的主变压器的容量、台数和形式，选择待设计变电所所含有的各种电气设备及其各项参数，并且通过计算，详细的校验了各种不同设备的热稳定和动稳定，并对其选择进行了详尽的说明。同时经过变压器的选择和变电所所带负荷情况，最后确定本变电所电气主接线方案和高压配电装置及其布置方式。论文包括设计的说明和设备选择的计算，并附有五张设计图纸（电气主接线图一张、变电所断面图两张、平面布置图一张、防雷保护图一张、继电保护原理图一张），可为以后的设计做些参考。由于时间紧张和能力有限，此论文中难免会出现遗漏和错误，希望老师给予指点和更正。最后，感谢各位老师给予我的帮助和大力支持，正因为你们精心的指导本次论文才得以更好的完成，再次表示深深的感谢！关键词电力系统，变压器，220KV/60KV降压变电所电气部分初步设计IIAbstractElectricalengineeringandprofessionalgraduateinitsautomationdesignsisanimportantlinkofthefirststeptotrainsstudentsynthesizetomakeuseofthefouryearsinuniversityanacademictheoriestheoryknowledge,independenceanalysisdefinitelyreachagreementengineeringactualproblemability.Thisdesignaccordingtoelectricpowersystemandautomationprofession(powerplantandelectricpowersystem)therequestthatgraduatethemissionbook,synthesizethefouryearsinuniversityaprofessionforlearningknowledgeand《electricpowerengineeringelectricitydesignmanual》,etc.Underthehelpthatguidetheteacher,passoneselfofdesignwhatargumentcompletewithmeticulouscare.Wholedesignprocessinside,completelyeconomicthatmeticulousconsiderationengineeringdesign,dependablethatsystemcirculate,vividetc.manyfactors,endcompletethisdesignproject.Thisdesignthemainaccordingtotherequestthatgraduatethedesign,aimingatthe220/60KVdeclinetopresstochangetogiveorgetanelectricshockagraduatethedesignthethesis.Thedesignisbasedonsummarizingourcountry’ssubstationdesignandoperation.Ittakestheselectionsofdeviceswhichthissubstationneededsuchasthetypeofelectricbus,thetypeofthepowerdistribution.Itismadeupoftheinstructionandthecaculatingparts.Andforblueprints(situationmainconnectedwirespicture,theplotandsectionofthesubstation,transformerprotectiveprincipleconnectionpicture),Itcanbeunsuitedforthesamedesigninfuture.Formylimitedknowledge,itisimpossibletobenomistakesinthedraft.Ihopetheteachergivetopointoutwithmakecorrection.Finally,thanksforeachteachertogivemyhelpwithsupportstrongly,positivebecauseyouwithmeticulouscareofleadingthisthesisjustcanbettercomplete,meantheprofoundwithgratitudeagain!Keywordelectricpowersystem,transformer沈阳工程学院毕业设计（论文）III目录内容摘要..........................................................................................................................................IAbstract..........................................................................................................................................II第一部分毕业设计说明书...........................................................................................................1第一章引言...............................................................................................................................1第二章主变压器台数和容量的确定...........................................................................................22.1主变压器选择的要求.....................................................................................................22.2主变压器的选择：.........................................................................................................2第三章主接线形式的选择及说明...............................................................................................43.1主接线的设计原则.........................................................................................................43.2主接线的设计要求.........................................................................................................43.3主接线的选择.................................................................................................................5第四章短路电流的计算...........................................................................................................84.1短路电流计算的目的...................................................................................................84.2短路的基本类型.........................................................................................................84.3一般规定.....................................................................................................................84.4计算步骤.......................................................................................................................94.4.1画等值电抗图...................................................................................................94.4.2计算短路电流步骤............................................................................................94.5计算方法.....................................................................................................................94.5.1标么值法...........................................................................................................94.5.2网络变换...........................................................................................................94.5.3短路电流周期分量的计算..............................................................................10第五章主要电气设备的选择...................