【作者】 徐东杰；

【导师】 贺仁睦；

【作者基本信息】 华北电力大学 ， 电力系统及其自动化， 2001， 硕士

【摘要】 电力系统是人类所创造的最复杂的动态系统之一。其中振荡稳定问题困扰着许多专家学者。本文围绕电力系统低频振荡特征提取这个中心问题，从各种分析方法的比较、算法的改进、以及实际系统的应用等几个方面，对Prony分析方法在振荡研究中的应用进行了较为全面深入的研究。本文完成的主要工作如下：1．讨论比较现有低频振荡问题几种主要的研究方法，虽然每一种方 法都在一定程度上满足分析的要求，但又都存在这样那样的不足。 因此提出采用新的信号处理方法，直接从响应信号（现场实测数 据）中提取特征值。2．详细介绍了Prony分析方法，通过大量的分析比较对算法进行改 进，并从信号处理的角度，对傅里叶变换、小波分析、Prony分析 进行对比。3．本文利用MATLAB进行仿真，对现场实测数据进行分析，提出了 对河北南网低频振荡问题的观点。更多还原

【Abstract】 Graduate Thesis of North China Electric Power University BeijingAbstractAbstractPower system is one of the most complex dynamic systems created by man, and the nature of oscillatory instability has mystified many practicing engineers. This dissertation concentrates on the research of power system low frequency oscillations. Comparison of kinds of analyses for electromechanical oscillations, improvements of Prony analysis, and the application of Prony method to the data obtained through field measure are comprehensively studied in the paper. The main points of this dissertation are listed as following:1.The paper presents summary discussions and comparative results as well as analysis of some methods for electromechanical oscillations. Although every method has its characters, it also exists some disadvantages. In order to solve these problems, the Prony analysis for power system oscillation is used.2.To show what is Prony analysis exactly, how to improve it, and explain three-signal processing tools, Fourier transform, Wavelets, Prony analysis.3.Simulation with MATLAB, and the use of Prony analysis to the field data measured in the network of the south of Hebei Province are showed in the dissertation.更多还原