中文摘要：

广域行波保护可以解决现有行波保护存在的判据信息来源单一和可靠性低等难题，但存在配置节点多、经济性差等问题。为此，论文提出了一种基于广域初始行波极性与时间信息的新型行波保护方法，该方法利用广域行波信息实现区域电网中的所有线路保护。电网故障时，利用故障初始行波极性信息界定行波故障域，然后融合故障域中的初始行波时间信息判定故障线路；电网拓扑结构发生变化时，仅需在原保护域的基础上进行局部修改，便可提高广域行波保护的自适应能力。仿真结果表明，该广域行波保护方法简便易行，可在配置有限数量行波检测单元的情况下，准确判别故障支路，有助于促进行波保护的工程应用。

英文摘要：

Wide area traveling wave protection can solve some problems of the existing traveling wave protection, such as single data source and low reliability, while protections must be equipped in many locations and this is not economic. To solve these problems, a novel wide area traveling wave protection was proposed in this paper. When a fault occurs, the fault region can be identified accurately just by analyzing polarity characteristics of every protection region; then the fault line can be determined by the integration of all the recorded arriving time information in the fault region. When the topology of the power network changes, only is local modification needed to improve the adaptability of the wide area travelling wave protection. Simulated results showed that the proposed protection is simple and can be easily realized. With a limited number of travelling wave detection units, it can accurately determine the fault line, and this can help to improve the engineering application of traveling wave protections.