电力变压器保护设计

错误!未找到引用源。毕业设计设计题目电力变压器保护设计系（部）电力工程系学科专业供用电技术班级姓名学号指导教师二〇一四年四月二十三日新疆工程学院毕业设计任务书学生姓名杨志超专业班级供用电技术11-3班设计题目电力变压器保护设计接受任务日期2014-3.1完成任务日期2014-4.26指导教师张尧指导教师单位新疆工程学院设计目标利用计算机控制技术实现对电力变压器的保护，了解三相电力系统电力变压器的保护方法，并分析电力变压器微机保护的特点，设计出保护装置的总原理图及模拟信号到数字信号的转换过程。设计要求2014年3月1日选题2014年3月2日--16日查找资料与搜集数据2014年3月17日--4月14日设计报告2014年4月15日--4月26日修改报告教师指导过程记录2014年3月1日讲解各报告大纲分组2014年3月14日解答各组所遇到的问题2014年3月27日学生教师会面查看进度2014年4月12日查看所有人员报告，并提出修改建议。2014年4月26日答辩参考资料【1】贺家李宋从距.电力系统继电保护原理.第三版【2】刘介才.工厂供电设计指导.【3】刘笙.电气工程基础.【4】何仰赞翁增银.电力系统分析.第三版新疆工程学院毕业设计成绩表学生姓名杨志超专业班级供用电技术11-3班设计题目电力变压器保护设计考核项目考核内容满分评分一、指导教师评分1、工作态度与纪律102、基本理论、基本知识、基本技能和外文水平103、独立工作能力、分析和解决问题能力104、完成任务的情况与水平（论文与实物硬件质量）10指导教师签字：年月日二、评阅教师评分1、论文质量（正确性、条理性、创造性和实用性）152、成果技术水平（理论分析、计算、实验和实物性能）15评阅教师签字：年月日三、答辩小组评分1、完成任务书所规定的内容和要求52、论文与实物的质量53、课题设计内容的讲述104、回答问题的正确性10答辩组长签字：年月日四、答辩小组成绩评定：负责人签字：年月日五、答辩委员会意见：答辩委员会主任签字：年月日I摘要电力变压器是电力系统中不可缺少的重要设备，他的故障给供电可靠性和系统的正常运行带来严重的后果，同时大容量变压器也是非常贵重的元件，因此，必须根据变压器的容量和重要程度装设性能良好的、动作可靠的保护元件。本文是笔者在阅读了大量专业资料、咨询了很多的专家和老师的前提下，按照指导老师所给的原始资料，通过系统的原理分析、精确的整定计算。做出的一套电力变压器保护方案。关键词电力系统故障，变压器，继电保护，整定计算IIABSTRACTThetransformeristheessentialequipmentintheelectricalpowersystem．Itsbreakdownmightbringtheseriousinfluencetothepowersupplyreliabilityandthesystemsafelyoperation．Atthesametimethelargecapacitypowertransformeristheextremelypreciousequipment．Therefore．Wemustinstallthereliablerelayprotectioninstallmentaccordingtothetransformercapacityrankandtheimportantdegree．Thearticleisabouttherelayprotectionofthetransformer.IhadconsultedmanyexpertsandteachersbeforeIfinishedthearticle．Atthesametimethemassivespecializedmaterialswasconsultedbyme．Itisnotdiffculttounderstandthelogicalorganiztionofthearticleforreaders．Andthearticlewillbringtheusfulhelptothecomradeswhoisworkingasaelectricalengineer.KeywordsPowerSystemFaultCondition,PowerTransformer,RelayProtection,SettingCalculation目录摘要···················································································错误!未定义书签。ABSTRACT································································································II第一章绪论·······························································································11.2电力变压器的型号·············································································11.3电力变压器的故障类型和不正常工作状态·····································1第二章电力变压器保护的类型······························································32.1电力变压器的保护类型··················································32.1.1变压器瓦斯保护··················································································32.1.2变压器纵联差动保护··········································································32.1.3电流速断保护·······················································································62.1.4过电流保护··························································································72.1.5零序电流保护·······················································································72.1.6过负荷保护··························································································72.1.7过励磁保护··························································································8第三章短路电流计算·············································································103.1画出短路等值电路·····················103.2短路电流计算························113.2.1保护装置的配置·················································································12第四章各保护装置的保护配置与整定计算·········································134.1电力变压器保护配置·····················································134.2电力变压器的整定计算··················································164.2.2110kV侧复合电压启动过电流保护整定计算·········································184.2.338.5kV侧方向过流保护······································································194.2.4110kV零序过电流保护········································································194.2.5变压器气体保护的整定·······································································20致谢·····················································································错误!未定义书签。参考文献····································································································221第一章绪论1.电力变压器简要介绍及型号1.1电力变压器的简要介绍在电力系统中广泛地用电力变压器来升高或降低电压，故电力变压器是电力系统中不可缺少的重要电气设备之一。它的安全运行是电力系统可靠工作的必要条件。电力变压器有别于发电机，它无旋转部件，是一种静止的电气设备，是连续运行的，停电机会很少，而且绝大部分安装在室外，受自然环境影响较大。另外，电力变压器时刻受到外接负荷的影响，特别是受电力系统短路故障的威胁较大。因此，电力变压器在运行中，仍然可能发生各种类型故障或出现不正常的工作状态。它的故障对电力系统的安全连续运行会带来严重影响，特别是大容量变压器的损坏，对系统的影响更为严重。尤其是随着电力事业的发展，超高压输电线路在我国的建设越来越普遍，大容量超高压的大型电力变压器的应用也随之扩大，其运行正常直接关系到整个电网可靠性。因此必须根据电力变压器容量的大小、电压的高低和重要程度，设置性能良好、动作可靠的继电保护装置。要求电力变压器继电保护不仅可靠，而且要快速。1.2电力变压器的型号电力变压器的型号有35kV级S9-~系列油浸式电力变压器S(B)H-M非晶合金卷铁芯电力变压器20KV级SC(B)10系列环氧树脂浇注干式变压器SGB11-R卷铁芯H级非包封线圈干式电力变压器SG10型H级绝缘干式电力变压器SC(B)9/10干式变压器10KV级ZPSG系列干式整流变压器SG-系列三相干式隔离变压器KBSG矿用防爆干式变压器QZB系列自耦变压器双电压无励磁调压干式配电变压器20KV级S11系列油浸式电力变压器35KV级ZS系列油浸整流变压器10kV级S9、S11系列油浸式电力变压器10kvS13型级超低损耗三角形卷铁心无励磁调压油浸式配电变压器CKSC系列串联电抗器等。1.3电力变压器的故障类型和不正常工作状态要完成电力系统继电保护的基本任务，首先必须“区分”电力系统的正常、不正常工作和故障三种运行状态，“甄别”出发生故障和出现异常的元件。2而要进行“区别和甄别”，必须寻找电力元件在这三种运行状态下的可测参数量(继电保护主要测电气量)的“差异”，提取和利用这些可测参数量的“差异”，实现对正常、