摘要随着科学技术日新月异的进步，人民生活水平进一步的提升，广大用户对用电稳定性有着极高要求。并且伴随电力系统网络联系日渐紧密，高压远距离输电线路逐渐变多，故障发生之后，能够迅速而且精确地定位出故障点进而排除故障,对于减小输电线路压力、紧缩停电排除故障时间，提高供电质量具有很大的好处。电力故障测距（定位）技术从一开始出现直至今日，出现过很多种检测方式，但目前应用最为广泛并且效率最高的就是行波定位技术。71699

本文利用小波变换的分析原理，探讨了基于小波变换原理和行波测距方法在故障定位中的决定性作用，并采用小波变换与搜索模极大值相结合的办法，分析信号的奇异性，检查出行波到达监测点时刻，从而通过波速计算能够达到找到故障点精确位置。

行波故障测距方法经过各国科研人员精心研究，时至今日，可以说是对原理研究进一步加深，测量方式也愈发完整，可是在现实生活和电力系统应用中还是会有诸多其他方面的约束。并且对于在校大学生来说在学习中使用matlab仿真并不能全部表示在故障现场的情况，通过了解真实故障情况，我们可知在现场测距定位中，真正情况经常和仿真出来理论值相差很大。经过多年的发展，行波测距方法的成熟对于电网无隐患并能平稳运行拥有十分重大的意义。

毕业论文关键词：行波测距  小波理论  电力故障  仿真

Traveling wave analysis and Simulation of power fault based on Wavelet Theory

Abstract  With the progress of science and technology are developing rapidly, people's living standards further enhance, the majority of users of electrical stability with high expectations. And along with the power system is increasing gradually, the growing number of high voltage long distance transmission line, after the failure to quickly and accurately find the fault point and troubleshooting, to reduce the pressure of transmission line, tight power troubleshooting time, improve the quality of power supply has great benefits. Power system fault location technology from a began to appear until today, there have been many kinds of detection methods, but currently used widely and efficiency is the highest in traveling wave fault location technology.

  This article emphatically studied based on wavelet transform principle and methods of traveling wave fault location in the fault location in a decisive role, according to the theory of wavelet analysis, using the wavelet transform and searching modulus maxima combining method, from the traveling wave fault location method, wavelet analysis and module maxima denoising principle, analysis of signal singularity, check out traveling wave arrives at the moment of monitoring points, thus by wave velocity can be calculated to find the precise location of the point of failure.

  Traveling wave fault location method by many researchers studied carefully. Today, it can be said that is the further study on the basic principle, measurement method has also increasingly complete, but in real life and its application to power system will have many constraints, and in the school using MATLAB simulation and not all said in the field failure, through the understanding of the real fault situation, we 

can know in real location, the real situation is often and simulation out theoretical values differ greatly. After years of development, the familiarity of traveling wave fault location method for power network no hidden and stable operation has very important meaning .

Key Words: traveling wave fault location  wavelet theory   power fault 

      simulation 

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