110KV变电站电气二次部分初步设计

从实施课程改革以来，我反复学习有关的教育教学理论，深刻领会新课标精神，认真反思自身教学实际，研究学生，探究教法本科毕业设计论文题目110kv变电站电气二次部分初步设计学生姓名陶杰学号所属院部电子与信息工程学院专业电气工程及其自动化班级电气2班指导教师孟鹏2011年5月从实施课程改革以来，我反复学习有关的教育教学理论，深刻领会新课标精神，认真反思自身教学实际，研究学生，探究教法摘要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，防雷保护。从而完成了110kV电气二次部分的设计。关键词：电力系统，短路电流，继电ABSTRACTIIABSTRACTDesignthetaskthistimeisaimatintensityofmasteringofeverysubjectknowledgeofthisreflecting,andoftestthisstudyresult.first,analyzethetendofloaddepartmentaccordingtoallparameterofloadaboutsystemandcircuitontaskbook.Itexpoundsthenecessitytothissituationfromtherespectofincreasingload.Thenthroughtothegeneralizationofplanningtobuildthetransformersubstationandtheanalysisoftheloadmaterials,safe,economyanddependabilityareconsidered,hasconfirmedthemainlywiringformof110kv,35kv,10kv.CalculatedandsuppliedpowerintherangeandconfirmedTVstation'snumberofthemainvoltagetransformerthroughloadfinally,capacityandtype,capacityandtypeofusingthevoltagetransformerstandsurelyatthesametime,finally,theresultofcalculationofcalculatingthatandshortoutaccordingtotheelectriccurrentoflargestlastingjob,makethecircuittoprotect,thevoltagetransformerisprotected,thebusbarisprotected,preventthethunderfromprotecting.Thusfinishedelectricdesignsoftheparttwotimesof110kvKeyWords：Powersystem；shortoutintheelectriccurrent；relayprotection目录III目录1绪论......................................................................................................................................12变电站的分析与设计..........................................................................................................32.1变电站的总体分析.......................................................................................................32.2变电站的负荷分析.......................................................................................................42.2.1Ⅰ、Ⅱ类负荷分析..............................................................................................53主变压器的选择及主接线选择..........................................................................................73.1主变压器的选择...........................................................................................................73.1.1主变容台数的选择................................................................................................73.1.2主变容量选择........................................................................................................73.1.3主变容量选择原则................................................................................................73.1.4主变台数的选择原则............................................................................................83.1.5主变容量和台数选择计算....................................................................................83.1.6绕组数和绕组连接方式的选择............................................................................83.1.7全绝缘、半绝缘、绕组材料等问题的解决........................................................83.1.8主变压器的冷却方式..........................................................................................103.2电气主接线设计.........................................................................................................113.2.1电气主接线的设计要求.........................................................错误!未定义书签。3.2.2主接线选择原则.....................................................................错误!未定义书签。3.2.3电气主接线形式的确定.........................................................错误!未定义书签。4短路电流的计算................................................................................................................184.1短路的概念及路电流的种类.....................................................................................184.1.1短路的概念..........................................................................................................184.1.2短路电流的暂态过程和短路电流种类..............................................................184.2短路电流的计算.........................................................................................................194.3在最大运行方式下的短路电流.................................................................................224.4短路电流计算结果.....................................................................................................295线路保护...............................................................................................错误!未定义书签。5.1电力系统继电保护的作用............................................................错误!未定义书签。5.1.1电力系统继电保护的基本任务.............................................错误!未定义书签。5.1.2对继电保护的基本要求.........................................................错误!未定义书签。5.2输配电线保护................................................................................错误!未定义书签。5.3线路末端短路电流........................................................................错误!未定义书签。咸宁学院学士学位论文IV5.4线路保护整定................................................................................错误!未定义书签。5.4.135kv侧线路保护整定.........................................................