【作者】 姜晟；

【导师】 舒乃秋；

【作者基本信息】 武汉大学 ， 电力系统及其自动化， 2004， 硕士

【摘要】 输电线路是电力系统的命脉，电力系统的发展对其经济性、安全性和可靠性提出了更高的要求。由于输电线路故障不仅严重危及电力系统的安全、稳定运行，而且对社会的经济生活和政治生活造成的影响也越来越大，因此一个精确、可靠的故障定位系统变得越来越重要。一方面，精确故障定位系统可以缩短寻找线路故障点的时间，节约大量的人力和物力；另一方面精确故障定位系统能及时发现线路的故障点，及早地处理停电事故，保证迅速恢复供电，减少因停电造成的综合经济损失。所以，输电线路故障定位系统具有极大的社会效益和经济效益，是一项具有重大技术经济意义的研究课题。 首先在论文第一章中，对目前国内外输电线路故障定位的基本方法及其发展状况进行了综合分析与总结，比较了各种定位方法的应用情况及其优缺点，并提出了行波法故障定位研究的必要性。 论文第二章中，作者结合输电线行波定位这一研究对象，对输电线路波过程的基本概念以及物理过程进行了详细地阐述，并对行波故障定位装置的基本原理进行了具体介绍。 论文的第三章主要是针对行波故障定位装置中的硬件设计进行了较为全面的研究。其中，对定位装置硬件设计中的三个重要组成部分——模拟通道传感器单元、高速数据采集单元以及暂态行波启动单元——进行了详细介绍。重点研究并提出了采用线性程度高、引入噪声小、频响宽的磁补偿式霍尔电流传感器。 论文的第四章，作者主要针对行波故障定位装置中的软件设计进行了较为全面地研究。在阐述小波变换理论的基础上，作者重点研究了基于小波变换的奇异点的检测理论，并通过大量的仿真实验，提出了在非线性阈值法滤噪的基础上采用模极大值线的方法来检测行波信号的奇异点。 在论文第五章中，本文对目前试验装置的实时数字仿真数据进行了详细的数学误差分析，并得出了一般结论。对于最后一章，作者总结了全文的研究成果，并结合装置在实验过程中发现的问题，提出几点改进的想法。更多还原

【Abstract】 Transmission lines are the vitals of electric power system. With the development of electric power system, transmission lines must be more economic, secure and reliable. Because the line faults not only harm the secure and stable operation of power system but also affect the living of societal economy and polity, the exact and reliable fault location system becomes more and more important. On the one hand, by using the exact fault location system, the time of finding fault point can be reduced and a mass of work force and outlay can be saved as well; on the other hand, it can locate the fault point timely and resume power supply quickly. Therefore the study of transmission line fault location system is an important course in electrical engineering.In the first chapter of the paper, some typical methods of transmission lines fault location in home and overseas are analyzed and summarized. The advantages and disadvantages of each method as well as its application are compared and discussed in detail. At last, the research of traveling wave fault location is proposed.In the second chapter, the basic conception and physical process of traveling wave of transmission lines are expounded, and the principle of traveling wave fault location equipment is described in detail as well.In the third chapter, the hardware design of traveling wave location equipment is studied in the round. Three main components of the location equipment hardware -Analog Channels Unit (sensor included), High Speed Data Acquisition Unit and Transient Traveling Startup Unit-are described particularly. Subsequently, the hall current sensor of magnetic compensation with the characters of high linearity, low noise and wide band is studied and presented especially.In the fourth chapter, the software design of traveling wave location equipment is also studied comprehensively. The wavelet transform theory, especially the singularity-detected theory is discussed in this chapter. At last, an algorithm of traveling wave singularity detection using modulus maximum line based on nonlinear threshold de-noising is presented after lots of simulations.Error analysis of RTDS experiment data for location equipment is described in the fifth chapter. Considering the problems lying in the experiment of the location equipment, some ideas for improving the traveling wave location equipment are put forward in the last chapter.更多还原