期刊论文

Accurate Detection Method for Voltage Traveling Wave Based on EMD Decomposition Combined with Wiener Filtering

中文

电力系统及其自动化学报

1003-8930

2019

31

12

28-34

10.19635/j.cnki.csu-epsa.000213

国家自然科学基金资助项目（51577013）；

本校为第一机构

行波在行波传感器传变过程中产生的波形畸变会导致暂态信息的缺失,因此如何精确检测电网一次行波信号对行波技术有着重要的意义。采用经验模态分解将专用电压行波传感器检测到的二次行波分解为不同频段的固有模态函数分量;构建专用电压行波传感器的正演传递函数模型,由正演传递函数模型推导出反演模型;基于反演模型利用维纳滤波反演算法对各固有模态函数分量进行反演,然后将反演后的固有模态函数分量合成,得到反演一次行波信号。仿真结果表明,该方法能真实还原一次行波信号,实现故障暂态行波时频信息的精确检测,有效解决二次行波部分暂态数据缺失问题。

The distortion of traveling wave in the transmission process within a traveling wave sensor will lead to the loss of transient information. Therefore,how to accurately detect the primary traveling wave signal of power grid is of significance to the traveling wave technology. In this paper, the secondary traveling wave detected by a dedicated voltage traveling wave sensor is decomposed into intrinsic mode function (IMF) components of different frequency bands by the empirical mode decomposition (EMD) method. Then, a forward transfer function model of the dedicated voltage traveling wave sensor ...