利用小波变换定位与辨识短时电压变动

Localization and Identification of Short-term Voltage Changes by Wavelet Transform

文章研究了小波变换检测短时电压变动问题,并利用小波变换对这几种典型的暂态扰动进行了MATLAB仿真。仿真结果表明,小波变换不仅能够有效地检测出电压变动发生的起止点从而确定扰动发生的持续时长,还能够准确地辨识电压变动的类型,为暂态电能质量问题的检测与解决提供了依据。

In this paper, wavelet transform is applied to detect short-term voltage changes disturbances. Several typical transient disturbances are simulated by MATLAB using wavelet transform. The results of simulation show that the wavelet transform can not only detect the starting and ending point of short-term voltage changes effectively and then determine the duration of the disturbance,but also accurately determine the type of voltage changes and provide a scientific method for the detection and solution of transient power quality problems.