35kv降压变电所继电保护的设计

山东工商学院SHANDONGINSTITUTEOFBUSINESSANDTECHNOLOGY毕业论文(设计)GRADUATIONTHESIS（DESIGN）论文（设计）题目TitleOfThesis（Design）35kv降压变电所继电保护的设计分院（系别）Department信息与电子工程学院专业Speciality电气工程及其自动化班级Class电气083班论文（设计）作者AuthorofThesis（Design）XXXX论文完成日期Date2012年05月论文（设计）指导教师Advisor刘成印指导教师职称TheTitleofAdvisor教授35KV降压变电所继电保护的设计35KVstep-downsubstationrelayprotectiondesign陈公胜Chengongsheng2012年5月May2012指导教师对毕业设计（论文）的评语Advisor’sCommentsonGraduationThesis(Design)评语：指导教师（签章）SignatureofAdvisor日期Date评阅人意见评阅人姓名：职称：选项标准：A很同意B同意C基本同意D不同意分项评价评价项目ABCD选题质量1选题符合专业培养目标，体现综合训练基本要求2题目难易适度3题目工作量适当4有理论意义或实际价值能力水平5查阅文献资料能力强6综合运用知识能力强7研究方案的设计能力强8研究方法和手段的运用能力强9外文应用能力强成果质量10文题相符11写作水平高12写作规范13篇幅适度14成果有理论或实际价值总体评价：优□良□中□及格□不及格□评阅人评语评阅人签字：年月日答辩（评审）委员会意见AppraisalofDefenceCommission答辩（评审）成绩MarkofDefence鉴定意见Appraisal&Comments主任（签章）SignatureofDean日期Date山东工商学院2012届毕业论文第1页35KV降压变电所继电保护的设计[摘要]本设计根据相关资料及参考书籍，作出了35KV降压变电站继电保护设计。设计说明书内容共分为五章，包括变压器的选择，短路电流计算，高压电器选择，继电保护等。该设计以实际负荷为依据，变电所的最佳运行为基础，按照有关规定和规范，完成了满足改要求的35KV降压变电所继电保护设计。变电所是电力系统中对电能的电压和电流进行变换、集中和分配的场所。为保证电能的质量以及设备的安全，在变电所中还需进行电压调整、潮流控制以及输配电线路和主要电工设备的保护。继电保护对我国电力系统的安全运行,起着不可替代的作用,在我国经济持续发展,对电力要求不断增大的情况下,要做好继电保护工作,就要从各方面对继电保护的基本任务和意义,以及起保护作用的继电保护装置有深刻的了解,并要及时掌握未来技术发展的方向。[关键词]35KV变电所继电保护山东工商学院2012届毕业论文第2页TheDesignOf35KVstep-downsubstationrelayprotection[Abstract]Designbasedonrelevantinformationandreferencebooks,made35KVstep-downsubstationrelayprotectiondesign.Thedesignspecificationcontentisdividedintofivechapters,includingthechoiceofthetransformershort-circuitcurrentcalculation,high-voltageelectricaloptions,protection.Thedesigntotheactualload,thebestoperationofthesubstation,completedinaccordancewithrelevantregulationsandnorms,tomeetthechangedrequirementsof35KVstep-downsubstationrelayprotectiondesignThesubstationistotransformthepowersystemvoltageandcurrentofelectricity,theconcentrationanddistributionofplace.Inthesubstationinordertoensurethesafetyofelectricpowerqualityandequipmentneededtocarryoutvoltageregulator,flowcontrol,aswellastransmissionanddistributionlinesandthemainelectricalequipmentprotection.ProtectionofthesafeoperationofChina'selectricpowersystem,playsanirreplaceableroleinChina'ssustainedeconomicdevelopment,theincreasingpowerrequirements,todotheprotectionwork,necessarytoallaspectsoftherelayprotectionofthebasictasksandsignificance,andtheprotectiveeffectofprotectiondeviceshaveadeepunderstandingandgraspthefuturedirectionoftechnologydevelopment[Keywords]35KVsubstationrelayprotection山东工商学院2012届毕业论文第3页目录第一章绪论.........................................................11.1继电保护的概念：.............................................11.2继电保护基本原理和保护装置的组成.............................11.3继电保护分类：...............................................21.4继电保护的基本要求：.........................................3第二章工厂供电系统.................................................42.1厂区配电电压选择.............................................42.2导线的选择..................................................62.2.1架空线的选择...........................................62.2.2选择电缆...............................................82.3总电压变电所所址的选择......................................82.4主变压器台数和容量的选择....................................92.5变压器主要运行方式确定......................................102.6主接线的选择...............................................112.7低压侧接线方式的确定.......................................14第三章短路电流计算................................................153.1系统等效电路图：............................................153.2基准参数选定：..............................................153.3阻抗计算（均为标幺值）：.....................................153.4短路电流计算：..............................................16第四章高压电器的选择..............................................184.135KV高压开关柜的选择.......................................184.2高压断路器的选择............................................184.3高压隔离开关的选择.........................................194.4高压负荷开关的选择.........................................214.5高压熔断器的选择...........................................224.6互感器的选择................................................244.6.1电压互感器............................................244.6.2电流互感器............................................25第五章继电保护设计................................................275.1电力变压器的继电保护.......................................275.1.2过电流保护............................................275.1.3电流速断保护..........................................285.1.4差动保护..............................................285.1.5过负荷保护............................................295.1.6瓦斯保护..............................................295.2低压侧配电保护.............................................295.3高压线路的继电保护.........................................295.3.1电流速断保护..........................................305.3.2限时电流速断保护......................................30山东工商学院2012届毕业论文第4页5.3.3定时限过电流保护............................................315.3.4过负荷保护............................................32总结...............................................................33致谢语.............................................................34参考文献.............................................