Detection and location of power quality disturbances by wavelet transform
Yunling Geng, Yigang He, Yang Dong-gen · Relay · 2005
Based on the property of wavelet transform on stressing local characteristics, the relationship between the modulus maximum of multi-scale wavelet transforms and the sudden-change points of a signal is studied, and the detection and the location of voltage sags and periodic impulses, which are the typical disturbance signals of power quality in power network are analyzed. The simulations show the feasibility of the approach, and the results show that wavelet transforms can more accurately detect and locate power quality disturbances.