MATLAB线路故障持续时间对电力系统稳定性的影响分析

摘要电能是当代社会最重要、便捷的能源，电力网络的稳定对社会的生产、生活有着重大的影响。输电线路发生故障时，会对电力系统的稳定运行产生影响，而研究故障在被切除之前的这一段持续时间的长短对于系统稳定性的影响，能够有利于对故障的操作响应，同时分析电力系统的稳定性对于电网的高效稳定运行有重大意义。快速切除故障对提高电力系统的暂态稳定性有着重要作用。电力系统受大扰动之后的功角特性可以作为电力系统暂态稳定的判据，由功角特性可以确定一个极限故障切除时间，若故障持续时间小于极限切除时间则系统暂态稳定，反之则是不稳定的。本文的主要工作有：32750
1.分析单机无穷大系统和多机系统极限稳定的计算方法；
    2.基于MATLAB程序仿真计算三机九节点系统的极限切除时间；
3.仿真分析不同故障地点、不同故障类型对极限切除时间的影响。
关键词电力系统稳定性分析   故障切除时间   三机九节点模型   暂态稳定
毕业论文设计说明书外文摘要
Title    Analysis of the Influence of Fault Duration Time   On Power System Stability
Abstract
Electricity is the most important and convenient energy in the contemporary society.The stability of the electric power network has a significant impact on social life and production.When the transmission line fails,there will be an impact on the stability of the power system.So studying the impact of the duration of the power system fault before it is removed will have help to the operation response of the fault.Meanwhile,analyzing the stability of power systems has great significance for the stable and efficient operation of the power network. Rapid removal of faults plays an important role in improving transient stability of power system. The power angle characteristics after the large disturbance of power system can be used as a criterion for transient stability of power system. We can identify a critical fault cleaning time by the power angle characteristic. The power system will be transiently stable when the duration of the fault is less than the critical fault cleaning time. Conversely, it is unstable.The main work of this paper is:
1.Analyzing the calculation method for the single machine infinite bus system and the multi machine system;
2.Calculating the critical fault cleaning time of the Three-machine Nine Nodes Model through the MATLAB simulation;
    3.Studying the influence of different fault locations and different fault types on the critical fault cleaning time.
Keywords power system stability analysis, fault cleaning time, Three-machine Nine Nodes Model, transient stability
目   次
1 绪论    1
1.1 电力系统的暂态稳定性    1
1.2 暂态稳定分析的简化假设    1
1.3 暂态稳定研究现状    2
1.4 论文主要内容    2
2 暂态稳定分析方法    3
2.1 引言    3
2.2 时域仿真法概述    3
2.3 计算方法    3
3 故障持续时间对系统稳定性的影响分析    8
3.1 单机无穷大系统的分析    8
3.2 多机系统分析    10
3.3 本章小结    16
4 故障类型及故障位置对极限切除时间的影响分析    17
4.1 故障类型对极限切除时间的影响    17
4.2 故障位置对极限切除时间的影响    20 MATLAB线路故障持续时间对电力系统稳定性的影响分析:http://www.751com.cn/zidonghua/lunwen_29492.html