Natural Frequency-Based Line Fault Location in HVDC Lines
Natural Frequency-Based Line Fault Location in HVDC Lines
复制标题
高压直流线路中基于固有频率的线路故障定位
DOI：
10.1109/tpwrd.2013.2269769
复制
发表时间：
2014-04-01
影响因子：
4.4
通讯作者：
Mai, Rui-Kun
中科院分区：
文献类型：
--
作者：
He, Zheng-You;Liao, Kai;Mai, Rui-Kun
为了预测 HVDC 系统中直流线路故障的位置，本文提出了一种基于行波固有频率的新算法，使用来自单端的 10 ms 电流数据。给出了行波固有频率、故障距离和输电线路末端反射系数之间的关系。采用多信号分类方法，通过行波的频谱分析来提取主导固有频率。计算主固有频率下的行波速度和反射系数来识别故障位置。通过使用电磁暂态仿真软件 PSCAD/EMTDC 进行详细仿真，研究了所提出的故障定位算法的性能。该方法不需要识别浪涌到达时间，与传统的基于行波的故障定位方法相比具有更强的鲁棒性。仿真结果表明，该方法是有效的，能够准确定位高压直流输电线路发生的故障。
To predict the location of dc line-faults in an HVDC system, a novel algorithm based on traveling-wave natural frequency using 10-ms current data from the single end is proposed in this paper. The relationship among the natural frequency of traveling wave, fault distance, and reflect coefficient at the terminal of the transmission line is presented. The multiple signal classification method is employed to extract the dominant natural frequency through the spectrum analysis of the traveling wave. The traveling-wave velocity and reflect coefficient under the dominant natural frequency are calculated to identify the fault location. Performance of the proposed fault-location algorithm is studied through detailed simulations carried out by using the electromagnetic transient simulation software PSCAD/EMTDC. The method does not need to identify the surge arrival time and it is more robust compared to the traditional traveling-wave-based fault-location methods. The simulation results have shown that the proposed method is valid and can locate the faults occurring on HVDC transmission lines accurately.