Continuous wavelet-based measuring and classification of short duration power quality disturbances
Yu Zhang · Dianli zidonghua shebei · 2004
A CWT(Continuous Wavelet Transform) - based method for measuring and classifying SDPQD(Short Duration Power Quality Disturbances)is introduced.By counting the energy distribution curve of CWT coefficient,it effectively classifies(where there can be many kinds or non - integer),transient oscillation,transient interruption,voltage sag,voltage swell and voltage interruption,which cannot be classified accurately by DWT because of harmonic.And it can detect all the indexes of power quality.The CWT coefficient - based law is introduced for detecting voltage disturbance range.Simulation results show that the proposed method is effective in the classification of SDPQD,especially in the detection of harmonics and voltage disturbance range.It is an inclusive and useful method.