Power quality detecting based on wavelet-multiresolution method
Heming Li · Journal of North China Electric Power University · 2003
The authors advance a method for power quality detection using wavelet-multiresolution and utilize the reconstructed signal to compensate the harmonics. After the disturbed signal is decomposed, the disturbing time and level can be identified and the disturbed signal can be compensated by the reconstructed signal. The wavelet-Daubechies is applied to detect voltage sag, transient disturb and harmonics. Simulation results indicate that the method displays a good detecting performance in both time and frequency field and can depict the strange characteristics of the signal.