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1、毕业设计(论文)题 目:平湖六店110kV变电站输电线路的继电保护设计 系(部):电气工程系专业班级:电力10-2 姓名:黄婷学号:201006075指导教师:张国琴2013年5月19日摘要继电保护可以保证电力系统正常运行,当系统中的电气设备发生短路故障时,能自动,迅速,有选择的将故障元件从系统中切除,以免故障元件继续遭到破坏,保证其他无故障部分正常运行;有能在排除故障的同时,也保证了人们生命财产安全。本次毕业设计以平湖六店110KV变电站的输电线路和电气接线方式作为主要原始数据,本设计围绕110KV变电站的输电线路进行的继电保护设计,根据平湖六店原始资料所提
2、供的变电站一次系统图,重点介绍线路的无时限电流速断保护和定时限过流保护保护的作用原理,保护的范围,动作时限的特性,整定原则等,又相对平湖六店的输电线路进行了短路计算及其速断保护和定时限过电流保护的整定计算,灵敏度校验和动作时间整定,通过计算和比较从而确定了输电线路保护的选型。相辅也介绍了输电线路的其他几种保护,如接地保护,距离保护,纵差保护和高频保护,简单介绍了这几种保护的工作原理组成部件,整定计算,影响因素等方面。通过对输电线路继电保护的设计使得输电线路在电网中能更加安全的运行。关键词:继电保护;短路计算;整定计算AbstractCanensurethenorma
3、loperationofpowersystemrelayprotection,shortcircuitfaultoccurswhentheelectricalequipmentinthesystem,canautomatically,rapidlyandselectivelytofaultcomponentsremovedfromthesystem,soastoavoidfaultcomponentscontinuetodamage,ensurethenormaloperationofothertrouble-freepart;Canhaveatthesametim
4、eoftroubleshooting,andguaranteethepeoplelifeandpropertysafety.Thegraduationdesigninpinghusixstores110kvsubstationofpowerlinesandelectricalconnectionmodeasthemainrawdata,thedesignaroundthetransmissionlinesof110kvsubstationrelayprotectiondesign,accordingtopinghusixstorestheoriginaldatapr
5、ovidedbythesubstationsystemdiagramatatime,focusonlinewithouttimelimitcurrentinstantaneousfaultprotectionandprotectionprincipleoffixedtimelimitovercurrentprotection,thescopeoftheprotectionactiontimelimitcharacteristics,principle,etc.,andrelativepinghusixshoptransmissionlinesforthecalcul
6、ationofshortcircuitandquickbreakprotectionandfixedtimelimitovercurrentprotectionsettingcalculation,thesensitivitysetting,checkandactiontimethroughcalculationandcomparisontodeterminetheselectionofpowertransmissionlineprotection.Handalsointroducedseveralofthetransmissionlineprotection,su
7、chasgroundingprotection,distanceprotection,longitudinaldifferentialprotectionandhighfrequencyprotection,introducedtheworkingprincipleofseveralkindsofprotectioncomponents,settingcalculation,theinfluencefactorsandsoon.Throughthedesignmakesthetransmissionlinerelayprotectionoftransmissio