特高压直流输电线路故障定位系统的方案设计

Scheme Design for Fault Location System of Uhvdc Transmission Lines Based on Principle of Traveling Wave

随着输电技术的不断革新,特高压直流输电(Ultra High Voltage Direct Current,UHVDC)的一些技术问题日益突出,主要表现在输送距离长、途径地理地貌环境复杂以及地形坎坷导致难以查找故障点等方面。如果能快速并准确地定位故障点,及时采取相应措施解决故障问题,便可以显著提升UHVDC的可靠性与稳定性,大大减少由于突发性停电事故导致的经济损失。因此,介绍了一种UHVDC线路故障定位设计方案,采用行波测距原理定位UHVDC线路故障,并提取故障特征量与数据库比对,可以实现对故障类型的判断,而疑难故障则交由专家云诊平台进行判断和处理。

With the continuous innovation of power transmission technology,technical problems of UHVDC transmission are becoming increasingly prominent.Fault point is difficult to find because of long transmission distance,complex geographical environment and uneven terrain.If we can locate and restore the fault point quickly and accurately,then we can significantly improve the reliability and stability of UHVDC,so that the economic loss caused by sudden power failure is greatly reduced.The scheme design mentioned in this paper using principle of traveling wave to locate UHVDC transmission fault point,which extracts fault feature and compares with database,is able to judge the fault type.Difficult faults can be judged and handled by expert cloud diagnosis platform.