故障状态下电力系统暂态稳定性研究设计说明书.doc

吉林化工学院毕业设计说明书 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： 0 学生姓名： 专业班级： 自动0903 指导教师： 职 称： 助 教 起止日期： 2013.03.04～2013.06.23 吉 林 化 工 学 院 Jilin Institute of Chemical Technology摘 要 本设计利用MATLAB的动态仿真软件Simulink搭建了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工具箱为平台，通过SimPowerSyetem 搭建了电力系统运行中常见的系统模型，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， 本文做的主要工作有： (1)Simulink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，对于提高电力系统的稳定性具有十分重要的意义。 关键词： 单机—无穷大系统；SimPowerSyetem；短路故障；小波变换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 meet 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 paper base on platform version of Matlab，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,