基于MATIAB的店里系统故障仿真与检测技术研究

1、. . 山东农业大学毕 业 论 文基于MATLAB的电力系统故障仿真与检测技术研究 院 部： 机械与电子工程学院 专业班级：电气工程及其自动化4班 届 次： 2015届 学生姓名： 孙丛丛 学 号： 20110804 指导教师： 宋成宝 助教 二一五年五月二十八日装订线. . . 39目 录摘要IAbstractII1引言11.1研究背景和意义11.2本论文主要工作12电力系统故障类型及理论分析32.1电力系统的构成32.2故障概述32.3各种短路故障的理论分析42.3.1三相短路故障的分析42.3.2单相接地短路故障的分析72.3.3两相短路故障的分析92.3.4两相接地短路故障的分析112.4本章小结133基于MATLAB的故障仿真分析143.1 MATLAB简介143.1.1概述143.1.2 MATLAB的电力系统工具箱介绍143.2电力系统仿真模型的建立与仿真参数设置153.2.1电力系统仿真模型的建立163.2.2仿真参数设置173.3电力系统短路故障仿真结果及分析213.3.1三相短路故障仿真分析213.3.2 A相接地短路故障仿真分析233.3.3 BC两相短路故障仿真

2、分析243.3.4 BC两相接地短路故障仿真分析263.3.5本章小结284基于序分量的短路电流检测技术的研究294.1短路电流检测技术概述294.2序分量检测技术的原理及实现294.3本章小结335结论与展望35参考文献36致谢38ContentsAbstractII1 Introduction11.1 The background and significance of research11.2 The paper work12 Electric power system and fault overview32.1 The composition of the power system32.2 Fault overview32.3 Theoretical analysis of various kinds of fault42.3.1 The analysis of the three-phase short circuit fault42.3.2 The analysis of the one-phase grounding short circuit fault72.3.3

3、The analysis of the two-phase short circuit fault92.3.4 The analysis of the two-phase grounding short circuit fault112.4 The summary of this chapter133 The fault simulation analysis based on MATLAB143.1 Brief introduction to MATLAB143.1.1 Summarization143.1.2 The introduce to the MATLAB toolbox power system143.2 The establishment of the power system simulation model and analysis153.2.1 Power system simulation model163.2.2 Simulation parameter settings173.3 The results and analysis of simulation2

4、13.3.1 The analysis and simulation of the three-phase short circuit fault213.3.2 The analysis and simulation of the A-phase grounding short circuit fault233.3.3 The analysis and simulation of the BC-phase short circuit fault243.3.4 The analysis and simulation of the BC-phase grounding short circuit fault263.3.5 The summary of this chapter284 Research on the detection of short circuit current based on the sequence component294.1 Overview of short circuit current detection294.2 The principle and R

5、ealization of sequence component detection technology294.3 The summary of this chapter335 Conclusion and Prospect35References36Acknowledgement38基于MATLAB的电力系统故障仿真与检测技术研究作者：孙丛丛 指导教师：宋成宝（山东农业大学 机械与电子工程学院 泰安 271018）摘要：电力系统是一个复杂的动态系统，在运行过程中，经常会发生故障。本论文针对电力系统常见的4种短路故障（三相短路、单相接地、两相短路、两相短路接地）进行了理论分析，并利用MATLAB/Simulink仿真软件搭建出了仿真模型，仿真出了4种短路故障短路点的电压与电流波形，而且，利用三相序量分析器将短路点电压与电流分解得到了A相的正序、负序和零序分量，结果表明，仿真与理论分析相一致。通过比较不同故障短路点的电流波形可知，三相短路故障短路点电流最大，危害最严重；通过比较不同故障短路点的电压与电流序分量波形可知，单相接地短路故障和两相接地短路故障均含有正序、负序和零序分量；而两相

6、短路故障只含有正序和负序分量。最后介绍了常用的短路电流检测方法，重点研究了利用负序和零序分量的短路电流检测方法，研究表明：以负序分量为特征量的检测方法在各种情况下，从反应程度和快速性上来说都十分理想。关键词: 电力系统 故障分析 MATLAB仿真 序分量 检测技术 Research on power system fault simulation and detection technology based on MATLABAuthor:Sun Congcong Supervisor:Song Chengbao(Mechanical & Electrical Engineering College of Shandong Agricultural University, Taian, Shandong 271018)Abstract Power system is a complex dynamic system and in the running process, the fault often occurs. In this thesis, four kinds of powe

7、r system short-circuit faults which contain three-phase short circuit, single-phase to ground, the two-phase short circuit and two-phase short circuit to ground are analyzed. And build a simulation model by MATLAB / Simulink simulation software, the simulation of the four kinds of short circuit fault plots the voltage and current waveforms and decomposed by a phase of positive sequence, negative sequence and zero sequence components of short-circuit voltage and current using three-phase sequence

8、 analyzer.As the result, theoretical analysis is Consistent with simulation. By comparing the current waveforms of different faults, the short-circuit point current of three-phase short-circuit fault is the maximum, and three-phase short-circuit fault the worst damage ; By comparing the sequence pomponent waveforms of different faults,single-phase to ground and two-phase short circuit to ground contain positive sequence, negative sequence and zero sequence components; two-phase short circuit contains only positive sequence and negative sequence components. At last, the common method of short circuit current detection is introduced, and the method of short circuit current detection using negative sequence and zero sequence component is studied. The research shows that the method of detecting negative sequence components is ideal for the degree and rapidity of the reaction.Keywords:Power system;Fault analysis;MATLAB simulation;Sequence component;Detection techn

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