基于matlab的电力系统短路电流计算

1湖北民族学院信息工程学院题目:基于matlab的电力系统短路电流计算专业：电气工程及其自动化班级：0308407学号：030840705学生姓名：指导教师：2011年6月1日2信息工程学院课程设计任务书学号030840705学生姓名专业（班级）0308407设计题目基于matlab的电力系统短路电流计算设计技术参数设置基准值SB＝100MVA,UB＝Uav对于K)3(1处，取则,对于K)3(2处，取则，设计要求1．结合已学过的课程，通过实践巩固并扩大知识面。2．完成一个简单电力系统或变电所的规划设计，掌握电力系统规划设计的基本要求和基本步骤，为今后参加实际工作打下实践基础。3．结合实例，完成相应潮流和短路计算，强化电力系统基本计算能力，培养严谨踏实的工作作风。工作量共19页工作计划15,16周，两周时间参考资料[1]何仰赞温增银.电力系统分析[M]武汉：华中科技大学出版社2002年[2]熊信银张步涵.电力系统工程基础[M]武汉：华中科技大学出版社2003年[3]邱关源，罗先觉.电路基础[M].北京：高等教育出版社.2006年指导教师签字年月日kVUavUj1151kAIj502.011531001kVUavUj5.102kAIj49.55.10310023信息工程学院课程设计成绩评定表学生姓名：学号：030840705班级：0308407课程设计题目：基于matlab的电力系统短路电流计算指导教师评语：成绩：指导教师：年月日4摘要随着电力工业的发展，电力系统的规模越来越大，在这种情况下，许多大型的电力科研实验很难进行，尤其是电力系统中对设备和人员等危害最大的事故故障，尤其是短路故障，而在分析解决事故故障时要不断的实验，在现实设备中很难实现，一是实际的条件难以满足；二是从系统的安全角度来讲也是不允许进行实验的。考虑这两种情况，寻求一种最接近于电力系统实际运行状况的数字仿真工具十分重要，而MATLAB软件中的SIMULINK是用来对动态系统进行建模、仿真和分析的集成开发环境，是结合了框图界面和交互仿真能力的非线性动态系统仿真工具，为解决具体的工程问题提供了更为快速、准确和简洁的途径。关键词：短路电流计算，MATLAB，仿真AbstractAlongwiththedevelopmentoftheelectricpowerindustry,thescaleofthepowersystemismoreandmorebig,inthiscase,manylargepowerresearchisdifficultto,especiallyinthepowersystem,equipmentandpersonneltotheharmsuchasthebiggestaccident,especiallyfaultfaultlocation,andontheanalysisoftheaccidenttosolvethefaultoftheexperiment,intherealityconstantlyinequipment,itisdifficulttoaccomplishaispracticalconditionstomeet;Thesecurityofthesystemfromtheperspectiveisnotallowedintheexperiment.Considerthetwokindsofcircumstances,foroneofthemostclosetopowersystemactualtheoperationconditionofdigitalsimulationtoolisveryimportant,andMATLABsoftwareSIMULINKisusedforthedynamicsystemmodeling,simulationandanalysisoftheintegrateddevelopmentenvironment,iscombinedwiththeblockdiagraminterfaceandinteractivesimulationofnonlineardynamicsystemabilityofsimulationtools,tosolvethespecificengineeringproblem,providesamorerapid,accurateandsimpleway.Keywords:short-circuitcurrentcalculation,MATLAB,thesimulatio5目录摘要..............................................................................................................................................41概述..............................................................................................................................................61.1短路产生的原因.................................................................................................................61.2短路的危害.........................................................................................................................61.3短路故障分析的内容和目的.............................................................................................61.4防范短路电流的措施.........................................................................................................62短路计算...................................................................................................................................82.1简单不对称故障的分析.....................................................................................................82.2短路电流的计算过程.........................................................................................................82.2.1选择基准值............................................................................................................102.2.2计算系统各元件阻抗标幺值................................................................................102.2.3求短路电流的周期分量及冲击电流....................................................................103用MATLAB计算短路电流..................................................................................................123.1MATLAB简介..................................................................................................................123.1.1MATLAB应用.......................................................................................................123.2Simulink简介....................................................................................................................123.2.1Simulink功能.........................................................................................................133.2.2Simulink特点.........................................................................................................133.3用MATLAB计算短路电流的实现...............................................................................143.3.1短路计算内容概述................................................................................................143.3.2电力系统短路电流计算仿真运行........................................................................153.3.3仿真参数设置........................................................................................................153.3.4仿真结果................................................................................................................164总结............................................................................................................................................18参考文献.........................................................................................................................................1961概述1.1短路产生的原因(1）.元件损坏例如绝缘材料的自然老化，设计，安装维护不良所带来的设备缺陷发展成短路等，(2).气象条件恶化例如雷