1、 故障状态下电力系统暂态稳定性研究 Research for Power System Transient Stability Analysis under Fault Conditions 学生学号： 学生姓名： 专业班级： 自动 0903 指导教师： 职 称： 助 教 起止日期： 2013.03.042013.06.23 - I - 摘 要 本设计利用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。 电力系统稳定器，就是为抑制震荡而研究的一种励磁控制技术，用于提高电力系统稳 定，解决震荡问题，是提高电力系统动
2、态稳定性的重要措施之一。 论文以 MATLAB 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； (3)基于 Haar 小波的故障检测与分析。 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
3、的稳定性具有十分重要的意义。 关键词关键词： 单机单机无穷大系统；无穷大系统；SimPowerSyetemSimPowerSyetem；短路故障；小波变换；短路故障；小波变换 故障状态下电力系统暂态稳定性研究 - II - Abstract This design 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 mee
4、t the needs of the running of aspects. Power system stabilizer(pss) is to suppress a low frequency oscillation ofadditional excitation control. Improving power system dynamic ,lowing frequence oscillation problem solving is to improve power system dynamic stability of the important measures. The pap
5、er base on platform version of Matlab，According to SimPowerSyetem toolbox to build power operation of common singleinfinite 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 wavel
6、et 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 faul
