电力系统行波测距方法及其发展

行波测距法具有测距精度高、定位速度快的特点,目前主要应用在高压输电线路中。首先比较全面地讨论了行波测距算法及研究现状,根据行波测距算法的原理不同,将其分为基于单条输电线路的单端法、多端法和基于广域行波信息的网络测距法,重点对单端法中的反射波识别、双端法中的GPS和IEEE1588对时、广域网络测距法中的IEC61850标准等问题进行了探讨。然后回顾了行波的获取、波头的检测,波速对测距的影响及消除行波波速的测距算法等关键问题的最新研究进展。在此基础上总结了行波法测距今后急需解决的关键问题。相关研究结果表明,行波故障测距在电力系统中有广泛的应用前景,是今后输电线路故障定位领域的重要发展方向。

Fault location methods based on traveling wave theory for power system and its development

Traveling wave fault location has the characteristics of high precision and fast speed position, which is mainly used in high voltage transmission line fault location. Firstly, this paper discusses the development and general situation of the research in this field. According to the different theories of the fault location, it can be generally divided into two parts, one is the single-terminal method or the multi-terminal method in a single transmission line, and the other is the wide-area fault location based on the network. Secondly, it focuses on the problems of reflection wave identification of the single-ended method, the clock synchronization technology based on GPS and IEEE1588 of the double-terminal method, and the wide-area fault location based on IEC61850. Then the latest research progress on the key issues of traveling wave acquisition, wave head detection, influence of wave velocity on the range, and the velocity elimination of traveling wave fault location algorithm are reviewed. Moreover, the future key issues to be solved urgently are also pointed out. It is shown that the traveling wave fault location has good application prospect in power system and will be the important development direction in the field of transmission line fault location.