超高压输电线路故障测距方法研究及程序设计.doc

超高压输电线路故障测距方法研究及程序设计摘要电力系统高压输电线路不仅距离长，而且分布广泛，沿线地区通过复杂的地形和多变的环境，就会很容易出现雷击等自然原因引起的线路故障。故障测距也叫做故障定位，是一种能根据不同的故障特征从而既快速又准确地测定故障点位置的技术。对高压输电线路进行准确的故障定位技术，是确保电网安全的重要措施，也保证了稳定和经济运行，能带来难以估算的经济和社会效益。因此，故障定位的研究多年以来一直都受到中外众多学者专家的重视。本文是在广泛阅读大量关于输电线路故障测距的相关文献的基础上，对目前的各种阻抗测距算法进行有序的总结，同时将算法分为两大类：单端电气量、双端电气量。分别对单端阻抗测距算法和双端阻抗法的各类算法的原理还有特点进行了分析比较，并对多种行波测距算法进行相应的总结。结合上述研究，自行提出了一套单端测距方案，故障信息系统可以有效采用这套方案。基于现有的硬件条件，仿真的计算结果也充分证明了该算法的可行性和性能优越。关键词：输电线路；故障测距；阻抗法；行波法Fault location and program design for high voltage transmission lineAbstractHigh voltage transmission line of the Power system is characterized by long distance, extensive distribution as well as complex terrain and changing environment of the region along the transmission line. Due to these features, the transmission line will be very vulnerable to lightning and other natural causes of line fault. Fault distance detection is also known as fault location, a technology that can determine the location of fault point quickly and accurately according to the different fault characteristics. Accurate fault location technology of the high-voltage transmission lines is not only an important measure to ensure the security of the power grid, but also the guarantee for the stable and economical operation which will bring innumerable economic and social benefits. Therefore, the study of fault location has been valued by scholars and experts home and abroad for many years.This thesis drew an orderly summary of currently used impedance ranging algorithm on the basis of an extensive range of related articles on the fault location of transmission line. The algorithm is divided into two categories: single-ended electric quantity and double-end electric quantity. The principle characteristics of these two algorithm are analyzed and compared and a variety of traveling wave ranging algorithms are summarized accordingly. Combined with the above study, a set of single-ended self-ranging program which can be effectively utilized in fault information sys