基于多测点的特高压长距离直流输电线路行波故障测距

发布时间：2018-07-04 13:01

本文选题：UHVDC + 长距离输电线路　；参考：《高电压技术》2017年07期

【摘要】：为解决长距离高压直流(HVDC)输电线路精确的故障测距问题,提出了一种基于多测点的行波测距方法。该方法是沿直流线路全线长范围内装设以Rogowski线圈为核心的行波检测单元,当直流线路发生故障后,测距主站通过分析各个检测点的故障行波波到时刻,实现故障区段的判别及错标时刻的剔除,并选其最邻近的3个检测点的波到时刻和其间对应的线路长度来计算故障距离。结果表明:该测距计算无需引入经验波速和线路全长,可以缓解波速变化和线路全长不准确所带来的测距误差。大量的测距仿真计算结果表明,通过多测点获取的故障信息,可以提高长距离HVDC线路测距的精度和可靠性。研究结果证明了所提方法的有效性,可为特高压直流(UHVDC)长距离输电线路故障测距提供参考。
[Abstract]:In order to solve the problem of accurate fault location for long distance HVDC transmission lines, a traveling wave location method based on multiple measurement points is proposed. In this method, a traveling wave detection unit with Rogowski coil as the core is installed along the whole line of the DC line. When the DC line fails, the main station of the location arrives at the time by analyzing the fault wave of each detection point. The fault section can be judged and erased, and the fault distance can be calculated by selecting the wave arrival time and the corresponding line length of the three nearest detection points. The results show that the ranging error caused by the variation of the wave velocity and the inaccuracy of the line length can be alleviated without the introduction of the empirical wave velocity and the total length of the line. A large number of simulation results show that the accuracy and reliability of long distance HVDC line location can be improved by the fault information obtained from multiple measuring points. The results show that the proposed method is effective and can provide a reference for UHVDC long distance transmission line fault location.
【作者单位】：昆明理工大学电力工程学院;国网河北省电力公司邢台供电分公司;
【基金】：国家自然科学基金(51667010;U1202233;51267009) 云南省人培项目(KKSY20160428)~~
【分类号】：TM75

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