仿真电力系统短路故障分析VIP免费

本科生毕业设计（论文）题目：运用Matlab仿真分析短路故障学生姓名：系别：机电系专业年级：电气工程及其自动化专业指导教师：2013年6月20日摘要本文先对电力系统的短路故障做了简要介绍，分析了线路运行的基本原理及其运行特点，并对短路故障的过程进行了理论分析。在深入分析三相短路故障的稳态和暂态电气量的基础上，总结论述了当今三相短路的的各种流行方案，分别阐述了其基本原理和存在的局限性。并运用派克变换及d.q.o坐标系统的发电机基本方程和拉氏运算等对其中的三相短路故障电流等做了详细的论述。并且利用Matlab中的simulink仿真软件包，建立了短路系统的统一模型，通过设置统一的线路参数、仿真参数。给出了仿真结果及线路各主要参数的波形图。最后根据仿真结果，分析目前自动选线法存在的主要问题及以后的发展方向。关键词：短路故障；派克变换；拉氏运算；MatlabABSTRACTThispaperfirstonthethree-phaseshortcircuitofelectricpowersystemisbrieflyintroduced,analyzedthebasicprincipleofoperationofthree-phasecircuitanditsoperationcharacteristic,andthethree-phaseshortcircuitfaultprocessundertooktheoreticalanalysis.Indepthanalysisofthree-phaseshortcircuitfaultofsteadystateandtransientelectricalquantitiesbasedonthesummary,thethree-phaseshortcircuitofvariouspopularprograms,respectively,expoundsitsbasicprinciplesandlimitations.AndtheuseofPecktransformandd.q.ocoordinatesystemofthegeneratorbasicequationandLaplaceoperatoronthethree-phaseshort-circuitcurrentindetail.AndtheuseofMatlabintheSimulinksimulationsoftwarepackage,toestablishaunifiedmodelofthree-phaseshort-circuitsystem,bysettingtheunifiedcircuitparameters,thesimulationparameters.Thesimulationresultsarepresentedandthemainparametersofthewaveformofline.Finally,accordingtothesimulationresults,analysisofthecurrentautomaticlineselectionmethodthemainexistingproblemsandthefuturedirectionofdevelopment.Keywords：Short-circuitfailure;Pecktransform;TheLaplaceoperator;Matlab目录第一章序言............................................................11.1短路故障研究依据.................................................11.2国内外研究现状...................................................11.2.1国外研究现状................................................11.2.2国内电力系统研究现状........................................2第二章电力系统对称短路分析..............................................52.1电力系统中短路的基本概括.........................................52.1.1短路的分类..................................................52.1.2短路发生的原因..............................................62.1.3短路发生的危害..............................................62.1.4短路故障分析的内容和目的....................................72.2简单无穷大电源系统三相短路电流分析...............................72.2.1简单无穷大电源供电系统的三相短路暂态电流....................72.2.2短路后的暂态过程分析........................................82.2.3短路冲击电流..............................................102.2.4最大有效值电流.............................................11第三章电力系统短路电流的实用计算.......................................123.1交流电流初始值的计算............................................123.1.1计算的条件和近似...........................................123.2简单系统''I计算.................................................14第四章短路系统的调试与仿真.............................................174.1仿真模型的设计与仿真............................................174.1.1实例分析....................................