SIGNAL FREQUENCY DISCHARGES SELECTION METHOD USING WAVELET TRANSFORM
The paper is devoted to forecasting of a residual resource of isolation of the power cable lines, based on an electrical method of measurement of partial discharge PD. The posed problem is to pick out useful signals (PD) among different types of noises. To solve the problem wavelet transform method is introduced. Mathematical models of PD impulses are given. Mathematical model of original signal filtering is given. The paper advances some requirements for the wavelet transform implementation. There was determined that Daubechies wavelet fully meets those requirements. This is proved by computing results.