高压直流输电线路故障定位研究综述

高压直流输电是我国的重点发展方向之一。快速、准确的高压直流输电线路故障定位对保障高压直流系统运行可靠性、减少停运时间具有重要意义。对目前应用于高压直流输电线路以及柔性直流配电网故障定位的主要技术，包括行波测距法、固有频率法、故障分析法和非精确同步测距法，进行了详细的分析和综述。探讨了不同故障定位技术在高压直流输电线路故障定位应用中的优缺点。结合传感器技术、计算机技术与人工智能技术的发展趋势，对高压直流输电线路故障定位技术的未来发展进行了展望。该研究给高压直流线路故障定位方法的研究者提供了良好的参考。

A review of fault location methods in HVDC transmission lines

High voltage direct current (HVDC) power transmission is one of the key development directions in China. Fast and accurate fault positioning of the HVDC transmission line is of great significance in ensuring operational reliability of the HVDC system and reduce shutdown time. The main technologies for fault positioning of an HVDC transmission line and flexible DC grid, including wave distance ranging, inherent frequency, fault analysis and the non-synchronous fault location method, are introduced and analyzed. The advantages and disadvantages of different fault positioning technologies are discussed. Finally, the future development of HVDC transmission lines is discussed by combining with the development trend of sensor, computer and artificial intelligence technology. This paper should provide a good reference for researchers working on fault positioning methods for HVDC transmission lines. This work is supported by the National Key Research and Development Program of China (No. 2018YFB0904700).