| 引用本文: | 向强铭,王茜,陈靖秋,刘智俊.基于奇异值分解理论的双端行波故障测距的研究[J].电力系统保护与控制,2014,42(12):14-18.[点击复制] |
| XIANG Qiang-ming,WANG Qian,CHEN Jing-qiu,LIU Zhi-jun.Study of two-terminal traveling wave fault location based on SVD theory[J].Power System Protection and Control,2014,42(12):14-18[点击复制] |
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| 摘要: |
| 行波故障测距中行波信号奇异点的精确检测和行波波速的确定是影响测距精度的主要因素。根据Hankel矩阵方式下奇异值分解第一个分量后的各分量具有的奇异性检测能力，对行波信号进行奇异值分解，利用第二个SVD分量脉冲模极大值检测出信号的奇异点。同时，提出一种不受行波波速影响的双端测距方法，通过检测故障初始行波和故障点反射波分别到达两端母线的时刻，列写方程组，得到与速度无关的测距公式。EMTDC仿真证明了该故障测距方法的正确性。 |
| 关键词: 奇异值分解 Hankel矩阵 奇异点检测 故障测距 |
| DOI：10.7667/j.issn.1674-3415.2014.12.003 |
| 投稿时间：2013-09-05修订日期：2013-11-29 |
| 基金项目: |
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| Study of two-terminal traveling wave fault location based on SVD theory |
| XIANG Qiang-ming,WANG Qian,CHEN Jing-qiu,LIU Zhi-jun |
| (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China) |
| Abstract: |
| There are two main factors influencing the accuracy of traveling wave fault location, namely the accurate detection of singular points of traveling wave signal and determination of traveling wave velocity. From the second singular value decomposition component signal, each signal has the singularity detection ability when Hankel matrix is used, by this method, the signal singularity is detected. A new two-terminal fault location method, which is not affected by traveling wave velocity, is proposed. By determining the arrival time both the fault initial traveling waves and the reflected wave from the point of failure reaching both ends of bus bar, the equations are written and the fault location formula unrated to wave speed is obtained. EMTDC simulation proves the correctness of this method. |
| Key words: singular value decomposition (SVD) Hankel matrix singularity detection fault location |
