Enhanced Noise Suppression in Partial Discharge Signals via SVD and VMD with Wavelet Thresholding

Table 4

Measured parameters for denoised PD signals.

Denoising methods	PD signal	SVD		Method of this paper
SNR	Surface discharge	-7.611	1.469	8.360
	Corona discharge	-11.204	2.115	7.802
MSE (10^-3)	Surface discharge	0.934	0.115	0.023
	Corona discharge	0.098	0.004	0.001
NCC	Surface discharge	0.338	0.566	0.970
	Corona discharge	0.266	0.669	0.956