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装 订 线 ……………….……. …………. …………. ………

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基于MATLAB的电力系统短路故障分析与仿真

院 部 机械与电子工程学院 专业班级 电气工程及其自动化 届 次 2015届 学生姓名

学 号

指导教师

目 录

摘要 .................................................................................................................................................. I Abstract .......................................................................................................................................... II 1 引言 ............................................................................................................................................. 1 1.1 课题研究的背景 .................................................................................................................. 1 1.2 课题研究的国内外现状 ...................................................................................................... 1 2 短路故障分析 ............................................................................................................................. 1 2.1 近年来短路故障 .................................................................................................................. 1 2.2 短路的定义及其分类 .......................................................................................................... 2 2.3 短路故障产生的原因及危害 .............................................................................................. 4 2.4 预防措施 .............................................................................................................................. 4 2.5 短路故障的分析诊断方法 .................................................................................................. 5 3 仿真与建模 ................................................................................................................................. 6 3.1 仿真工具简介 ...................................................................................................................... 6 3.1.1 MATLAB的特点 .......................................................................................................... 6 3.1.2 Simulink简介 ................................................................................................................ 7 3.1.3 SPS(SimPowerSystems) ................................................................................................. 8 3.1.4 GUI（图形用户界面） ................................................................................................. 8 3.2 模型的建立 .......................................................................................................................... 8 3.2.1 无限大电源系统短路故障仿真模型 ........................................................................... 8 3.2.2 仿真参数的设置 ........................................................................................................... 9 4 仿真结果分析 ........................................................................................................................... 16 4.1 三相短路分析 .................................................................................................................... 16 4.2 单相短路分析（以A相短路为例） ............................................................................... 18 4.3 两相短路（以A、B相短路为例） ................................................................................. 22 4.4 两相接地短路（以A、B相短路为例） ......................................................................... 25 5 结论 ........................................................................................................................................... 28 6 前景与展望 ............................................................................................................................... 28 参考文献 ....................................................................................................................................... 29 致 谢 ....................................................................................................................................... 30

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Contents

Abstract ................................................................................................................................................................ II

1 Introduction ..................................................................................................................................................... 1 1.1 Project background to the study .......................................................................................................... 1 1.2 The research situation at home and abroad ....................................................................................... 1 2 Analysis of short-circuit fault ...................................................................................................................... 1 2.1 Short-circuit fault in recent years ........................................................................................................ 1 2.2 Definition and classification of short-circuit fault ........................................................................... 2 2.3 Causes and damage of short-circuit fault .......................................................................................... 4 2.4 Precautionary measures ......................................................................................................................... 4 2.5 Method to analysis and diagnosis of short-circuit fault.................................................................. 5 3 Simulation and modeling ............................................................................................................................. 6 3.1 Introduction to simulation tools .......................................................................................................... 6 3.1.1 Features of MATLAB .................................................................................................................... 6 3.1.2 Introduction to simulink ................................................................................................................ 7 3.1.3 SPS(SimPowerSystems) ................................................................................................................ 8 3.1.4 GUI（Graphical User Interfaces） ............................................................................................. 8 3.2 Establishment of the model .................................................................................................................. 8 3.2.1 Infinite power system short-circuit fault simulation model ................................................... 8 3.2.2 Simulation parameter settings ...................................................................................................... 9 4 Simulation analysis...................................................................................................................................... 16 4.1 Analysis of three-phase short-circuit ................................................................................................ 16 4.2 Analysis of single-phase short circuit .............................................................................................. 18 4.3 Analysis of two-phase short circuit .................................................................................................. 22 4.4 Analysis of two-phase short circuit to ground ................................................................................ 25 5 Conclusions ................................................................................................................................................... 28 6 Outlook and prospect .................................................................................................................................. 28 References ........................................................................................................................................................ 29 Acknowledgement .......................................................................................................................................... 30

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