形态小波在输电线路故障测距中的应用  

Application of Morphological Wavelets Based on the Lifting Scheme in Transmission Line Fault Location

作　　者：陈瑜[1] 卢毅[1] 成乐祥[1] 

机构地区：[1]东南大学电气工程学院,南京210096

出　　处：《电网与清洁能源》2010年第2期18-21,27,共5页Power System and Clean Energy

基　　金：国家自然科学基金项目(50577006)

摘　　要：如何准确提取行波浪涌到达时刻,是输电线路行波测距领域中的一个重要研究课题。提出一种新的输电线路故障测距算法,该算法通过形态学算子构造非线性提升方案,从信号的时域上提取奇异点,能够较为快速和准确地定位奇异发生的时刻,适合应用于输电线路故障测距。仿真结果表明,基于提升方案的形态小波(MW)在进行输电线路故障测距时能够不受故障类型、故障点位置、过渡电阻和故障合闸角的影响,与传统的小波算法相比,具有算法量小和易于实现的特点。How to extract the accurate arrival moment of the travelling surge is an important issue in the field of the transmission line fault location by using travelling wave. In this paper, the writer proposes a new transmission line fault location algorithm, which, combining the advantage of mathematical morphology and lifting schemes, is able to construct nonlinear lifting scheme by morphological operators, and extract singular points from the time and space domain. This method can position singular moment more quickly and accurately, and therefore it is very suitable for transmission line fauh location. The simulation results show that the transmission line fault location remains unaffected by the type of fault, the position of fault, fault resistance and fault reclosing angle. Compared with the traditional wavelet method, the algorithm lessens the computation amount and is easy to be realized.

关 键 词：形态小波 提升格式 数学形态学 故障测距 

分 类 号：TM726.1[电气工程—电力系统及自动化] TM726