【作者】 谢欢；

【导师】 鞠平；

【作者基本信息】 河海大学 ， 电力系统及其自动化， 2004， 硕士

【摘要】 电力系统是一个复杂的动态系统，其振荡稳定问题一直是电力系统研究的热点问题。本文简要介绍了基于GPS的功角测量技术，围绕着使用Prony方法提取电力系统低频振荡特征根这个中心，分析了该方法对测量数据的要求及其在电力系统稳定器设计中的应用等理论问题，最后结合实际工程项目设计和编写了实时数据服务器程序。本文完成的主要工作如下： 1．讨论分析了现在低频振荡问题主要的一些研究方法，并分析了其在实际应用中存在的不足。据此研究使用Prony方法直接分析测量信号、提取特征振荡模式的方法，并结合前后两种方法分析两者之间的联系，从理论上分析了Prony方法的有效性。 2．简要介绍了基于GPS的功角测量技术和Prony分析方法，提出利用基于广域测量的Prony方法分析电力系统低频振荡的思想，并利用PSASP和Matlab工具大量的仿真计算验证了基于GPS广域测量系统的Prony方法在研究低频振荡问题上的有效性。 3．简要介绍了基于GPS广域测量的Prony方法在PSS设计中的应用，并研究了其在扰动统一性问题的应用，得到初步结果。 4．结合在河南的工程实际项目，分析了为实现实时电网监测系统的一些关键技术(诸如多线程同步、OCI和阻塞模式等)，最后设计和编写了中调实时数据服务器程序。更多还原

【Abstract】 Power system is a complex dynamic system. This paper concentrates on the research of power system low frequency oscillation based on angle measurement technology. Introduction of the angle measurement technology, comparison of kinds of analyses for eletromechanical oscillation, application of Prony method to the data obtained through wide-area measurement in power system analyses are studied in the paper.The main studying achievement of this paper are listed as following:1. The paper presents introduction, comparison and existent disadvantage of some method for low frequency oscillation. In order to overcome these problems, the Prony method based on angle measurement technology is used. It’ s ability to estimate the frequency, damping and strength of modal components would be quite valuable to power system research.2. The angle measurement technology based on GPS is introduced briefly. Simulation with MATLAB and PSASP, and the validity of Prony method based on wide-area measurement through GPS for power system low frequency oscillation is shown in this paper.3. An application of Prony signal analysis in controller design for multimachine systems that is based on incorporates both local and interarea electro-mechanical oscillatory modes is introduced.4. In the article some critical technology such as multi-thread OCI Socket and select function was analysed. To meet the requirement of real_time power network supervisory system, a novel method is proposedto design and realize a data server.更多还原