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龙湾二次60/10KV降压变电所继电保护部分初步设计TherelayingdesignforelectricalpartofLongwan60KVstepdownsubstation龙湾二次60/10KV降压变电所－I－摘要电力系统专业的毕业设计是一次比较综合的训练，它是我们将在校期间所学的专业知识进行理论与实践的很好结合，运用理论知识和所学到的专业技能进行工程设计和科学研究，提高分析问题和解决问题的能力。在完成此设计过程中，我们可以学习电力工程设计、技术问题研究的程序和方法，获得搜集资料、查阅文献、调查研究、方案比较、设计制图等多方面训练，并进一步补充新知识和技能。本毕业设计论文是60/10KV二次降压变电所电气部分初步设计。为了保证供电的可靠性和一次性满足远期负荷的要求，按照远期负荷规划进行设计建设，从而保证变电所能够长期可靠供电。根据毕业设计任务书的要求，综合所学专业知识及《变电所设计》等书籍的有关内容，设计过程中完成了主变选择、电气主接线的拟定、短路计算、保护整定计算、配电装置的规划、继电保护和自动装置的规划等主要工作。在此期间，遇到的种种问题均通过反复比较、验算，并请教老师得以解决。毕业设计论文由设计说明书、设计计算书、一套图纸（电气主接线图、保护配置图、保护展开图）组成。内容较为详细，对今后扩建有一定的参考价值。近年来，电力在世界各国能源和经济发展中的作用日益增长，它已成为现代社会实用最广、需要最快的能源。变电所的合理设计与建设是一个极其重要的组成部分。本次设计是根据毕业设计任务书的要求，综合所学专业知识及《变电所设计》等书籍的有关内容，在指导老师的帮助下，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可靠性、经济性、灵活性等诸多因素，最终完成本设计方案。通过完成此毕业设计论文，进一步领会我国电力工业建设的政策观念和经济观点，培养对工程技术、经济进行较全面的综合分析能力。关键词变电所,短路计算，继电保护，保护配置沈阳工程学院毕业设计－II－AbstractTheprofessionalgraduateinsysteminelectricpowerdesignisoncemoresynthesizeoftraining,itiswewillduringtheperiodofschoolaprofessionforlearningknowledgeproceedtheoriesandpracticeverygoodcombination,makeuseofthetheoriesknowledgeproceedswithaprofessionforlearningtechnicalabilityengineeringdesignwithsciencestudy,increaseanalyzeproblemwithproblem-solvingability.Incompletethisdesignprocess,wecanstudytheelectricpowerengineeringthedesign,investigativeprocedureinproblemintechniquewithmethod,becollectedinformation,checkedtheculturalheritage,investigatetheresearch,projectcomparisonanddesignthevarioustraininginetc.ingraphics,combinefurthercomplementthenewinformationknowswithtechnicalability.Thisgraduatedesignthesisisa60/10KVadecliningtopresstochangetogiveorgetanelectricshockanelectricitypartsoffirststepsdesign.Forthesakeofdependablethatguaranteethepowersupplywitharequestthatcontentedlong-termburthen,carriesaccordingtotheforwardtheprogrammingproceedingdesigndevelopments,frombutguaranteetochangetogiveorgetanelectricshockcanlong-termdependablepowersupply.Designtherequestofthemissionbookaccordingtothegraduate,synthesizeaprogrammingforlearningprofessionknowledgeand《changinggivingorgetanelectricshockthe》designedwaitingdog's-earrelevantlycontents,designingintheprocesscompletinglordchangingchoice,electricitylordconnectinglineardraw-up,shortcircuitcomputing,electricityequipmentschoosing,goingtogetherwithelectricityequipping,aftergiveorgetanelectricshocktheprotectionwiththeprogrammingoftheautomaticdevicewithdefendprotectiveprogramminginthunderetc.mainwork.Hereperiod,allkindsproblemsthatmeetallpassestocompare,checktocalculateagainandagain,andaskthecansolutioninteacher.Graduatetodesignthethesisfromdesignthemanual,designcalculationbook,asetofdiagramspaper(theelectricitylordconnectsthelinediagram,totalflatsurfacearrangesthediagramandgotogetherwithelectricityequipcrosssectiondiagram,defendthunderprotectiondiagram)constitute.Thecontentsismoredetailed,tofromnowonextendtoconsultscertainlyvalue.Forthisyear,electricpowerisininternationalcommunityenergywitheconomydevelopofthefunctionincreasesincreasingly,ithavebecomemodernthesocietyispracticalthemostwidelyandneedthequickestenergy.Changethereasonabledesignthatgiveorgetanelectricshockareawithdevelopmentsveryconstitutingthepartimportantly.Thisdesignisatguidingteacherdescend,passingoneselfofdesignwhatargumentcompletewithmeticulouscare.Wholedesignprocessinside,completelydependable,economic,vivid...etc.manyfactorsthatmeticulousconsiderationengineeringdesign,endcompletethisdesignproject.龙湾二次60/10KV降压变电所－III－Passtocompletethisgraduatedesignthethesis,furtherappreciatingtheourcountrythepolicyideaofelectricpowerindustrydevelopmentswiththeeconomicstandpoint,educatestoproceedtotheengineeringtechnique,economymorecompletelytosynthesizetheanalyticalskill.Keywordssubstation,shortcircuitcomputing,relaying,Protectanallocation沈阳工程学院毕业设计－IV－目录摘要...........................................................................................................................................IABSTRACT...................................................................................................................................II引言..........................................................................................................................................1第一篇说明书............................................................................................................................2第一章主变压器的选择............................................................................................................2第二章电气主接线的选择........................................................................................................52.1主接线的设计原则及基本要求..........................................52.2本变电所主接线的选择................................................6第三章短路电流的计算说明....................................................................................................93.1短路电流计算的目的..................................................93.2短路的基本类型......................................................93.3短路电流计算的基本假定..............................................93.4一般规定................................