三相交流发电机短路故障仿真分析

分类号TP391编号20110814002UDC621密级公开中国民航飞行学院毕业设计（论文）题目三相交流发电机的短路故障分析FaultanalysisofThreePhaseACGeneratorshortcircuitShortCircuit作者姓名钱文豪专业名称电气工程及其自动化指导教师姓名及职称许将军讲师提交日期2015年6月23日答辩日期2015年6月24日答辩委员会主任唐庆如评阅人2015年6月24日中国民航飞行学院航空工程学院毕业论文三相交流发电机短路故障分析学生：钱文豪指导教师：许将军摘要众所周知，同步发电机在电力系统中发挥着至关重要的作用，现代社会中使用的电能几乎由同步发电机所产生，同步发电机在人类社会的生活生产中占据着非常重要的地位。为了更直观地了解同步发电机短路故障状态下的特性指标，尽量避免发生短路故障或及时对短路故障做出相应的正确措施，更合理选择保护装置，研究同步发电机的短路故障状态就成了当务之急的问题。随着科技进步与自动化水平的提高，人们要求能够快速分析故障和解决故障，在电力系统中，因运行环境、可操作性问题的限制，现场对同步发电机测试不太现实，因此，利用软件仿真的方法对同步发电机进行仿真研究就显得极其重要。本论文通过MATLAB软件建立同步发电机的仿真模型，对常见的短路故障进行仿真研究，以便更好地掌握同步发电机短路故障状态下的各特性，并设计了GUI用户界面，更好的实现了人机交互。文中对各短路故障进行了仿真实验，从仿真结果可以看出，本文所设计的仿真系统满足对同步发电机短路故障的研究需求，实现论文设计的目标。关键词：同步发电机；短路故障；MATLAB中国民航飞行学院航空工程学院毕业论文FaultanalysisofThreePhaseACGeneratorShortCircuitAbstract:Asisknowntoall,synchronousgeneratorplaysanimportantroleinpowersystem.Nowtheelectricpowerusedinoursocietyalmostproducebysynchronousgenerators.Synchronousgeneratoroccupiesaveryimportantpositioninhumansociety.Inordertolearningthecharacteristicparametersofsynchronousgeneratormoreintuitiveinfaultcondition,andtryingtoavoidshortcircuitfaultortomakecorrespondingmeasurestocorrectvisionintimeortoprotectdeviceinthemethodofreasonable,studyingthesynchronousgeneratorfaultstatushasbecomeanurgentproblems.Withtheprogressofscienceandtechnologyandtheimprovementofautomationlevel,peoplerequiretobeabletoquicklyanalyzefaultandsolvetheproblemintheelectricpowersystem.Withthelimitationoftheenvironmentinrunningasynchronousgenerator,doingatestofgeneratorsdirectlyisunlikely.Therefore,withtheaidofMATLABsoftwarepowerfulcomputingandgraphicsprocessingsimulationtostudythesynchronousgeneratorisextremelyimportant.Inthispaper,asimulationmodelofthesynchronousgeneratorisestablishedbyMATLABsoftwareinordertobettergrasptheperformanceindexofsynchronousgeneratorinfaultcondition.AndwealsodesigntheGraphicalUserInterface(GUI)forbetterrealizingthehuman-computerinteraction.Eachshortcircuitfaultsimulationexperimentswascarriedoutinthispaper,ascanbeseenfromthesimulationresults,thesimulationsystemisdesignedtosatisfydemandsforsynchronousgeneratorshortcircuitfaultresearch,realizingthetargetofthispaper.KeyWords:Synchronousgenerator；Shortcircuitfault；MATLAB中国民航飞行学院航空工程学院毕业论文I目录第1章绪论......................................................................................................................................................11.1前言....................................................................................................................................................11.2研究的目的........................................................................................................................................11.3研究的内容........................................................................................................................................1第2章同步发电机理论分析..........................................................................................................................22.1同步发电机的主要结构....................................................................................................................22.2短路的分类........................................................................................................................................42.3同步发电机的工作原理....................................................................................................................4第3章同步发电机的数学建模......................................................................................................................53.1正方向的规定....................................................................................................................................53.2同步发电机的基本方程....................................................................................................................5第4章Matlab的介绍....................................................................................................................................114.1MATLAB的优势特点.....................................................................................................................124.2GUI介绍...........................................................................................................................................144.3M文件的编写...................................................................................................................................164.4a，β，0系统.................................................................................................................................18第5章实例仿真与分析................................................................................................................................195.1三相突然短路仿真分析..................................................................................................................195.2两相负载突然短路分析..................................................................................................................215.3单相负载短路突然分析..................................................................................................................23第