分布式发电系统孤岛效应对策研究

武汉理工大学毕业设计（论文）分布式发电系统电孤岛效应对策的研究学院（系）：自动化学院专业班级：电气1204班学生姓名：刘杨指导教师：陈前平学位论文原创性声明本人郑重声明：所呈交的论文是本人在导师的指导下独立进行研究所取得的研究成果。除了文中特别加以标注引用的内容外，本论文不包括任何其他个人或集体已经发表或撰写的成果作品。本人完全意识到本声明的法律后果由本人承担。作者签名：年月日学位论文版权使用授权书本学位论文作者完全了解学校有关保障、使用学位论文的规定，同意学校保留并向有关学位论文管理部门或机构送交论文的复印件和电子版，允许论文被查阅和借阅。本人授权省级优秀学士论文评选机构将本学位论文的全部或部分内容编入有关数据进行检索，可以采用影印、缩印或扫描等复制手段保存和汇编本学位论文。本学位论文属于1、保密囗，在10年解密后适用本授权书2、不保密囗。（请在以上相应方框内打“√”）作者签名：年月日导师签名：年月日I摘要随着人类社会的发展，人口数量的不断上升，资源的利用率提高，伴随着也产生了各种问题，比如化石能源危机和电能紧缺，并且对环境产生日益严重的危害。于是伴随着各种新能源的利用和发展，分布式发电技术成为了21世纪的一个电力行业的重要发展方向。但是随着分布式发电系统数量在电网中的比重越来越大，特别是其中基于可再生能源的发电装置应用越加广泛，使得电网容易产生孤岛现象，孤岛效应成了人们不得不面对的又一难题。本文首先阐述了分布式发电系统的概念，继而引出分布式发电系统中的孤岛效应问题，并对孤岛效应的基本概念、产生机理和危险性进行了阐述，接着比较分析了分布式发电系统的反孤岛对策，孤岛检测技术和有效性评估，还简述了微电网中对孤岛效应的利用问题。最后对论文进行了总结，并对未来孤岛效应的检测技术和发展趋势进行了展望。关键词：分布式发电系统孤岛效应反孤岛微电网IIABSTRACTWiththedevelopmentofhumansociety,thepopulationcontinuestorise,increaseresourceutilization,alongwithalsohadavarietyofproblems,suchasfossilenergycrisisandpowershortagesandanincreasinglyseriousenvironmentalharm.Withthedevelopmentandutilizationofnewenergy,distributedgenerationtechnologyhasbecomeanimportantdirectionofdevelopmentofthepowerindustryofthe21stcentury.However,withtheproportionofthenumberofdistributedpowergenerationsysteminthegridisgrowing,inparticularthepowergenerationunitbasedonapplicationofrenewableenergysourceshasbecomeincreasinglywidespread,sothegridproneislandphenomenon,islandingbecomethepeoplehavetofaceanotherproblem.Thispaperforthedescriptionofdistributedgenerationsystem,whichleadstoanislandproblemofdistributedgenerationsystems,thedefinitionandelementaryissuesofislanding,andthenemphasizestheislandingdetectionproblemandtheprosandconsofvariousprotectionmethods.thisPaperdescribebrieflyintentionalislandingofmicro-grid.Finally,thepapermakesummarizesforthemainwork,andprospectthedemandsandtendencyofthedevelopmentoftheislanddetectingtechniquesinthefuture.Keywords:distributedgeneration、islanding、anti-islandin、Micro-gridIII目录摘要..................................................................................................................................................IABSTRACT....................................................................................................................................II第1章绪论...................................................................................................................................11.1研究背景..........................................................................................................................11.2分布式发电系统..............................................................................................................11.2.1分布式发电系统的概念.......................................................................................11.2.2分布式发电系统的应用与前景...........................................................................21.3分布式发电系统孤岛效应问题......................................................................................41.3.1研究意义...............................................................................................................41.3.2孤岛效应的危害...................................................................................................51.3.3国内外研究现状...................................................................................................51.4本文选题意义和主要研究内容..............................................................................6第2章孤岛效应的基本问题.......................................................................................................72.1孤岛效应产生的原理......................................................................................................72.2孤岛效应的检测方法....................................................................................................102.3孤岛检测技术的性能评估............................................................................................122.4本章小结........................................................................................................................12第3章现有反孤岛策略和评估分析.........................................................................................133.1被动式孤岛检测方案....................................................................................................133.1.1过/欠压、过/欠频孤岛检测技术.......................................................................133.1.2电压相位跳变检测法.........................................................................................143.1.3谐波检测法.........................................................................................................143.2主动式孤岛检测方案....................................................................................................153.2.1主动频率偏移法.................................................................................................153.2.2Sandia频率偏移法.............................................................................................163.2.3滑膜频率偏移法.................................................................................................173.3检测盲区和有效性评估....................................................................