利用行波经验模态分解实现线路故障测距  

Fault Location of Transmission Line by Empirical Mode Decomposition of Traveling Wave

作　　者：徐伟宗[1] 唐昆明[1,2] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]重庆新世纪电气有限公司,重庆400030

出　　处：《电力系统及其自动化学报》2011年第4期67-71,共5页Proceedings of the CSU-EPSA

摘　　要：为提高行波测距的准确性,根据暂态行波的频谱特征以及行波的高频分量的传播特性,利用经验模态分解原理所具有良好的时频局部化性能、自适应多分辨特性来提取行波的高频分量,将其用来确定行波测距所需的时间参数,同时使用该频率下的行波传播速度,从而实现将行波的时间和速度结合起来以达到更好的准确性,ATP仿真结果表明该方法具有可行性且测距精度好于小波变换。In order to improve the accuracy of traveling wave fault location, according to the spectrum characteristics of transient traveling wave, and wave propagation characteristics of high-frequency components, empirical mode decomposition that has a good time-frequency localization properties, adaptive multi-resolution features is employed to extract the high-frequency component from traveling wave and determine the traveling wave time parameters for location. The propagation velocity of the frequency, which can be traveling wave time and velocity combined is used to attain better precision, the ATP simulation results show that the method is feasible and does provide higer location accuracy than by wavelet transform.

关 键 词：行波测距 高频分量 经验模态分解 特征时间尺度 小波变换 电磁暂态程序 

分 类 号：TM773[电气工程—电力系统及自动化]