Detection and classification of multiple power signal patterns with Volterra series and interval type-2 fuzzy logic system

Protection and Control of Modern Power Systems

Table 4 Classification results under SNR 20 db

Events	Sag	Swell	Harmonic	Transcient	Sag+Har	Swell+Har
Sag	48
Swell		47
Harmonic			47
Transcient				42
Sag+Har					42
Swell+Har						41
Classification efficiency in %	96	94	94	84	84	82
Classification error in %	6	6	6	16	16	18
Overall efficiency	89