Application of continuous wavelet transform for study of voltage flicker-generated signals

An application of continuous wavelet transform (CWT) for the analysis of vo ltage flicker-generated signals is proposed. With the time-frequency locali zation characteristics embedded in wavelets, the time and frequency informa tion of a waveform can be integrally presented, thereby enhancing the monit oring of voltage nicker-generated signals at different time intervals. The Morlet wavelet has been selected as the basis function for the CWT in the p roposed method. The merit of the method lies in that the signal component a t any frequency of interest can be more easily monitored than by discrete w avelet transform (DWT). The high frequency required in the voltage nicker s tudy can be also comfortably accomplished. This approach has been applied t o investigate various simulated voltage nicker-generated signals, and inspe ct the data recorded from the actual are furnace operation. Test results he lp solidify the practicality and advantages of the proposed method for the applications.