电气工程及其自动化基于MATLAB的电力系统暂态稳定仿真分析

摘要

随着电力工业的迅速发展，电力系统的规模日益庞大和复杂，出现的各种故障，会给发电厂以及用户和电厂内的多种动力设备的安全带来威胁，并有可能导致电力系统事故的扩大，从技术和安全上考虑直接进行电力试验可能性很小，迫切要求运用电力仿真来解决这些问题依据电网用电供电系统电路模型要求，因此，论文利用MATLAB的动态仿真软件Simulink搭建了单机—无穷大电力系统的仿真模型，能够满足电网在其可能遇到的多种故障方面运行的需要。

论文以MATLAB R2009a电力系统工具箱为平台，通过SimPowerSyetem 搭建了电力系统运行中常见的单机—无穷大系统模型，实验得到了在该系统发生各种短路接地故障并由断路器自动跳闸隔离故障的仿真结果。并利用小波分析具有很强的信号特征提取能力，尤其对暂态突变信号或微弱变化信号的处理变现出明显的优势，达到了仿真的目的。

本文做的主要工作有：

（1）Simulink下单机—无穷大仿真系统的搭建

（2）系统故障仿真测试分析

通过实例说明，若将该方法应用到电力系统短路故障的诊断中，快速实现故障的自动诊断、检测，对于提高电力系统的稳定性具有十分重要的意义。

关键词单机—无穷大；SimPowerSyetem；短路故障；

ABSTRACT

With the rapid development of electric power industry, electric power system, as an increasingly large scale and complicated power system fault, The user will give power plants and power equipment of the security threats, and may have caused the accident of power system, technology and safety considerations from directly power test possibility, urged using electric simulation to solve these problems based on grid power supply system, Therefore, paper depend on the model of dynamic simulation by MATLAB build software Simulink infinite power system of single - simulation model, the grid in various fault may meet the needs of the running of aspects.

The paper base on platform version of Matlab R2009a，According to SimPowerSyetem toolbox to build power operation of common single—infinite system model, the experiment in the system was obtained by various circuit breaker automatically earthing faults and fault isolation of simulation results trip. Using the wavelet analysis and has strong ability of the signal feature extraction, especially for transient mutations signals or weak signal processing showed obvious advantages, Reaching purpose of the simulation.

The main work is :

(1) Building this simulation system of single - infinite under Simulink

(2) Fault simulation test analysis of system

(3) Fault detection and analysis based on Haar wavelet

Through examples, if this method to the power system fault diagnosis, fast fault detection and diagnosis, automatic for improving the stability of power system has important significance.

keywords：Single—infinite；SimPowerSyetem；Short circuit faults；Wavelet transform

目录

目录 0

摘要 0

ABSTRACT (1)

第1章绪论 (1)

1.1 MATLAB及SimPowerSystem简介 (1)

1.2 配电网的故障现状及分析 (2)

1.3 暂态稳定仿真流程 (3)

第2章单机—无穷大暂态稳定仿真分析 (4)

2.1 复杂电力系统暂态稳定性分析 (4)

2.2 单机—无穷大系统原理 (5)

2.3 结论 (6)

第3章Simulink下SimPowerSystem模型应用 (7)

3.1 仿真系统模型步骤 (7)

3.2 仿真模型的搭建 (8)

3.2.1模型详细参数设置 (11)

3.3 各种提高暂态稳定性措施的运行效果仿真 (20)

3.4 结论 (24)

结论和展望 (25)

附录 ............................................................................................................ 错误！未定义书签。参考文献 (26)