Power Transformer Partial Discharge Fault Diagnosis Based on Multidimensional Feature Region

Table 2

The contrast analysis.

Fault types	Fault classification accuracy (%)
	PCA-SVM	Wavelet-SVM	The approach proposed in this paper
Surface discharge	88.7	95.9	97.8
Electrode tip discharge	88.1	97.1	95.3
Insulation internal defect	90	94.2	96.1