Abstract: In view of the signal detection and classification of power quality disturbance problem，the power quality disturbances detection and classification methods based on EMD were proposed, and the common several kinds of disturbance signal were simulated. The time of disturbance occurrence and duration, the frequency and amplitude of disturbance can be detected accurately by this method. Such as voltage sags, voltage swells, voltage interruptions and other disturbances raised the signal amplitude and frequency changes can be estimated. The results of MATLAB simulation show that the proposed method is simple and effective. 

Key words: Power quality disturbance ,  Classification ,  Detection , EMD , Hilbert transform

摘要： 针对电能质量扰动信号的检测和分类问题,提出了一种基于EMD的电能质量扰动检测与分类方法,
并对常见的几种扰动信号进行仿真。应用该方法检测扰动发生时间、持续时间以及扰动的频率与幅值。仿真结果
表明,所提算法简洁有效,能够准确分析电能质量扰动信号,可以估计电压凹陷、电压凸起以及电压中断等扰动信号
的变化幅度和频率。

关键词: 电能质量扰动 , 分类 , 检测 , 经验模态分解 , Hilbert变换