110KV变电站二次系统设计

沈阳工程学院毕业设计I摘要本次设计任务旨在体现对本专业各科知识的掌握程度，同时检验本专业的学习结果。首先根据任务书上所给系统与线路及所有负荷的参数，分析负荷发展趋势。从负荷增长方面阐明了建站的必要性，然后通过对拟建变电站的概括以及出线方向来考虑，并通过对负荷资料的分析，安全，经济及可靠性方面考虑，确定了110kV，35kV，10kV以及站用电的主接线，然后又通过负荷计算及供电范围确定了主变压器台数，容量及型号，同时也确定了站用变压器的容量及型号，最后，根据最大持续工作电流及短路计算的计算结果，做出线路保护，变压器保护，母线保护。从而完成了110kV电气二次部分的设计。关键词：变电所，二次系统，自动装置，继电保护。大林110kV终端变电所二次部分设计IIAbstractDesignthetaskthistimeisaimatintensityofmasteringofeverysubjectknowledgeofthisspecialityreflecting,andoftestthisspeciality’sstudyresult.first,analyzethetendofloaddepartmentaccordingtoallparameterofloadaboutsystemandcircuitontaskbook.Itexpoundsthenecessitytothissituationfromtherspectofincreasingload.Thenthroughtothegeneralizationofplanningtobuildthetransformersubstationandtheanalysisoftheloadmaterials,safe,economyanddependabilityareconsidered,hasconfirmedthemainlywiringformof110kV,35kV,10kV.CalculatedandsuppliedpowerintherangeandconfirmedTVstation'snumberofthemainvoltagetransformerthroughloadfinally,capacityandtype,capacityandtypeofusingthevoltagetransformerstandsurelyatthesametime,finally,theresultofcalculationofcalculatingthatandshortoutaccordingtotheelectriccurrentoflargestlastingjob,makethecircuittoprotect,thevoltagetransformerisprotected,thebusbarisprotected,preventthethunderfromprotecting.Thusfinishedelectricdesignsoftheparttwotimesof110kV.KeyWords：powersystem；shortoutintheelectriccurrent；relayprotection.沈阳工程学院毕业设计I目录摘要................................................................................................................................IAbstract.........................................................................................................................II目录................................................................................................................................I1引言.....................................................................................................................-1-2变电所一次主接线设计.......................................................................................-2-2.1设计原则.............................................................................................................-2-2.2设计要求.............................................................................................................-2-2.2.1可靠性.............................................................................................................-2-2.2.2灵活性.............................................................................................................-2-2.2.3经济性.............................................................................................................-3-2.2.4本设计配置.....................................................................................................-3-2.3主接线图.............................................................................................................-3-3继电保护和自动装置设计...................................................................................-4-3.1总则....................................................................................................................-4-3.2一般规定............................................................................................................-4-3.3主变保护的说明..............................................................................................-5-3.3.1变压器的主要故障.........................................................................................-5-3.3.2本次设计中主变安装的保护.........................................................................-5-3.4母线保护.............................................................................................................-6-3.4.1母线保护的原则..............................................................................................-6-3.4.2母线保护的分类..............................................................................................-7-3.5断路器失灵保护................................................................................................-8-3.6线路的保护装置.................................................................................................-9-3.6.1110kV侧线路保护.......................................................................................-9-3.6.210-35kV侧线路保护......................................................................................-9-3.7安全自动装置..................................................................................................-11-3.7.1一般规定.......................................................................................................-11-3.7.2自动重合闸装置（ZCH）...........................................................................-11-3.7.3自动电源投入装置（BZT）.......................................................................-11-4变压器保护整定...............................................................................................-13-4.1变压器整定计算的一般原则...........................................................................-13-4.1.1比率制动量接入原则.................................................................................-13-4.1.2确定最小动作电流....................................