110KV电力系统继电保护设计

毕业设计（论文）题目：110KV电力系统继电保护设计学院：…学院专业班级：电气工程及其自动化..级..班指导教师：…职称：…学生姓名：……学号：0000000000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成果。首先，根据毕业设计的要求，建立合理的电力系统，本次毕业设计以拟建110KV变电站为例。其次，根据毕业设计的主要内容，对110KV电力系统进行继电保护配置，并依据继电保护配置原理，对所选择的保护进行整定和灵敏性校验，确定保护方案。本次毕业设计分为六个章节，第一章主要讲述电力系统继电保护概述，包括继电保护发展简史，继电保护的作用，继电保护的基本要求，继电保护的基本原理、构成和分类，简单叙述电力系统继电保护的基本情况；第二章变电站分析主要是对负荷的分析，主变压器台数、容量，绕组的连接方式，以及冷却方式的确定，最后是电气主接线的确定；第三章是系统短路电流的计算，包括短路电流的概念、种类，短路电流计算的目的，以及短路电流标幺值计算法；第四章线路保护，包括线路保护原理分析、保护整定计算和灵敏性校验，本系统采用单测电源网络相间短路的电流保护，包括电流速断保护，定时限过电流保护，简单实用；第五章变压器保护，包括变压器保护原理分析、保护整定计算和灵敏性校验，主保护采用的是纵联差动保护和瓦斯保护，两者结合做到优势互补，后备保护是过电流保护。第六章母线保护，包括母线保护原理分析、保护整定计算和灵敏性校验，本系统主要采用了完全电流差动保护，简单可靠。关键词：短路电流，整定计算，灵敏度，继电保护ABSTRACTThedesigntaskistoreflectonthesubjectsoftheprofessionalknowledgelevels,whiletestingtheprofessionallearningoutcomes.First,accordingtotherequirementsofgraduation,toestablisharationalsystem,thisgraduationdesigntotheproposed110KVtransformersubstationasanexample.Secondly,accordingtothemaincontentofgraduation,onthe110KVpowersystemrelayprotection,relayprotectionaccordingtheprincipleofconservationofthechosensensitivitysettingandchecking,determinetheprotectionprogram.Thegraduationprojectisdividedintosixchapters,thefirstchapterdescribesanoverviewofpowersystemprotection,includingthebriefhistoryofrelayprotection,relayprotection,theroleofthebasicrequirementsofrelayprotection,relayprotectionofthebasicprinciplesofcompositionandclassification,abriefdescriptionofthebasicsituationofthepowersystemprotection;secondchapterofthemainsubstationisaloadanalysis,thenumberofmaintransformers,capacity,windingconnections,andcoolingmethodstodetermine,finally,determinationofmainelectricalwiring;Thethirdchapteristhesystemshort-circuitcurrentcalculation,includingtheconceptofshort-circuitcurrent,typeofshortcircuitcurrentpurposesofthecalculationandshortcircuitcurrentperunitvaluecalculationmethod;fourthZhanglineprotection,includingthePrincipleoflineprotection,protectionsettingcalculationsandsensitivityofcalibration,thesystemusessingle-phaseshortcircuittestcurrentpowernetworkprotection,includingCurrentProtection,atimelimitforover-currentprotection,simpleandpractical;Chaptertransformerprotection,includingtheprincipleoftransformerprotection,protectionsettingcalculationsandthesensitivityofschoolexperience,themainprotectionisusedindifferentialprotectionandgasprotection,combinationofthetwodocomplementeachother,back-upprotectionisacomplexvoltagestartover-currentprotection.ChapterVIofthebusprotection,includingtheprinciplesofbusprotection,protectionsettingcalculationsandthesensitivitycheck,thesystemmainlyusesafullydifferentialcurrentprotection,simpleandreliable.KEYWORDS:short-circuitcurrent,settingcalculation,sensitivity,relayprotection目录第1章电力系统继电保护概述........................................11.1继电保护发展简史............................................11.1.1继电保护发展现状......................................11.1.2继电保护的未来发展....................................11.2继电保护的作用..............................................11.3对电力系统继电保护的基本要求................................21.4继电保护的基本原理、构成与分类..............................51.4.1基本原理..............................................51.4.2构成..................................................81.4.3分类..................................................9第2章变电站分析.................................................112.1变电站的负荷分析...........................................112.2主变压器...................................................132.2.1主变台数和容量计算...................................132.2.2绕组数和绕组连接方式的选择...........................142.2.3主变压器的冷却方式...................................152.3电气主接线.................................................152.3.1电气主接线的设计要求.................................152.3.2电气主接线形式的确定.................................16第3章短路电流计算...............................................183.1短路的概念及短路电流的种类................................183.1.1短路的概念...........................................183.1.2短路电流的暂态过程和短路电流种类.....................183.2短路电流的标幺值计算法.....................................193.3短路电流的简化计算.........................................203.4在最大运行方式下的短路电流.................................21第4章线路保护...................................................284.1单测电源网络相间短路的电流保护.............................284.1.1电流速断保护（第Ⅰ段）...............................284.1.2整定值计算及灵敏性校验...............................294.1.3限时电流速断保护（第Ⅱ段）...........................294.1.4定时限过电流保护（第Ⅲ段）...........................304.2线路末端短路电流..........................................324.3线路保护整定..............................................334.3.135kv侧线路保护整定..................................334.3.210kv侧线路保护整定..................................33第5章变压器保护.................................................355.1电力变压器保护的重要性.....................................355.2电力变压器的故障类型和不正常工作状态.......................355.2.1变压器的故障类型.....................................355.2.2变压器的不正常工作状态...............................355.3变压器保护的配置原则.......................................365.4变压器瓦斯保护的基本原理及整定.............................385.4.1瓦斯继电器的基本原理..................