摘要
电压骤降是电网中一种典型的暂态电压扰动信号,为了检测出其发生电压扰动的位置,现在多采用小波变换或小波包变换对扰动信号进行检测。利用Matlab仿真对电网中的暂降信号进行检测,对比小波包变换与小波变换对扰动信号突变点检测的效果。仿真结果表明:在不去噪直接进行检测的情况下,使用相同的采样频率和相同信噪比强度,小波变换对扰动点的检测更准确。
Voltage sag is a kind of typical power grid of transient voltage disturbance signal. In order to detect the occurrence problem positions, many by wavelet transform or wavelet packet transform to disturbance signal is detected. This paper, by using MATLAB sim- ulation in the grid sag signal detection, makes contrast on the effect of the wavelet packet transform and wavelet transform to disturbance signal detection point mutations. The simulation results show that the sampling frequency is in the same SNR strength wavelet transform to disturbance of more accurate detection points.
出处
《农业科技与装备》
2011年第12期43-44,47,共3页
Agricultural Science & Technology and Equipment
关键词
电压骤降
小波变换
小波包变换
vohage sag
wavelet transform
wavelet packet transform
