输电网故障行波网络保护方法研究

发布时间：2018-06-01 22:09

本文选题：行波保护 + 行波信号　；参考：《长沙理工大学》2014年硕士论文

【摘要】：随着电力系统的快速发展与电网规模的日益扩大,人们对电网发生故障后对故障点进行快速准确地查找与排除,以及对电网安全稳定运行的呼声日渐高涨。如何对电网中的故障点进行快速而精准的定位已经逐渐成为电力系统建设与发展所面临的一个重要课题。近年来,由于信号采集技术、高精度授时技术、智能数学分析技术等一系列科学技术的发展,极大了促进了电网行波保护技术的研究,其中对电网中的输电线路实现故障行波距离保护是确保电网安全稳定运行的重要技术。论文对国内外现有的行波保护技术与方法进行了全面的分析与总结,在此基础上提出了一种基于广域行波信息的新型行波保护方法,同时还提出了一种电网故障行波检测装置的优化配置方法。论文首先分析了行波保护的研究现状,详细阐述了行波保护的原理以及行波保护技术存在的主要问题,并对各种保护的优缺点进行了仔细的归纳与总结,之后对故障行波信号在电网中的传播,以及故障行波信号的检测及提取进行了探讨与分析,得出电网中的某条输电线路发生故障时,线路中会产生一个高频暂态行波信号,该信号可以真实反映故障信号的特征,因此可以通过检测暂态行波信号所蕴含的信息来进行故障行波保护。综合上述分析与研究,论文提出了一种基于广域行波信息的新型行波保护方法,根据电压行波信号与电流行波信号的极性来对故障线路进行有效的判断与甄选。此外,还提出了一种电网故障行波检测装置的优化配置方法,在确保电网中所有线路的故障行波信号能被检测的基础上使得配置的行波检测装置数目最小,从而提高电网故障行波定位系统的经济性与可靠性,最后,利用ATP-EMTP仿真软件对电网进行了仿真分析验证了保护方法与配置方法的可行性。论文提出了一种基于厂广域行波信息的新型行波保护方法,同时还提出了一种电网故障行波检测装置的优化配置方法。这两种新方法对于行波网络保护技术与系统的发展起到了积极的推动作用,为行波保护技术与故障行波检测装置配置的推广与应用奠定了坚实的基础。
[Abstract]:With the rapid development of the power system and the increasing expansion of the scale of the power network, the voice of people to find and eliminate the fault points quickly and accurately after the fault occurred in the power network, as well as to the safe and stable operation of the power network is rising day by day. How to locate fault points quickly and accurately has gradually become an important issue in the construction and development of power system. In recent years, due to the development of a series of science and technology, such as signal acquisition technology, high precision timing technology, intelligent mathematical analysis technology and so on, the research of traveling wave protection technology in power grid has been greatly promoted. The fault traveling wave distance protection for transmission lines is an important technology to ensure the safe and stable operation of power network. Based on the analysis and summary of the existing traveling wave protection techniques and methods at home and abroad, a new traveling wave protection method based on wide-area traveling wave information is proposed in this paper. At the same time, an optimal configuration method of fault traveling wave detection device in power network is proposed. Firstly, this paper analyzes the research status of traveling wave protection, expounds the principle of traveling wave protection and the main problems existing in traveling wave protection technology, and sums up the advantages and disadvantages of various kinds of protection carefully. After that, the propagation of the fault traveling wave signal in the power network and the detection and extraction of the fault traveling wave signal are discussed and analyzed. It is concluded that a high frequency transient traveling wave signal will be produced in the transmission line when the fault occurs in a transmission line in the power network. The signal can truly reflect the characteristics of the fault signal, so the fault traveling wave protection can be carried out by detecting the information contained in the transient traveling wave signal. Based on the above analysis and research, a new traveling wave protection method based on wide-area traveling wave information is proposed. The fault line can be effectively judged and selected according to the polarity of voltage traveling wave signal and current traveling wave signal. In addition, an optimal configuration method of fault traveling wave detection device in power network is proposed. On the basis of ensuring that the fault traveling wave signal of all lines in the power network can be detected, the number of configured traveling wave detection devices is minimized. In order to improve the economy and reliability of the fault traveling wave location system, finally, the feasibility of the protection method and the configuration method is verified by the simulation analysis of the power network using ATP-EMTP simulation software. In this paper, a new traveling wave protection method based on plant wide area traveling wave information is proposed. At the same time, an optimal configuration method of power network fault traveling wave detection device is also proposed. These two new methods play a positive role in the development of traveling wave network protection technology and system, and lay a solid foundation for the popularization and application of traveling wave protection technology and fault traveling wave detection device configuration.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM773

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