Figure 2From: HOS network-based classification of power quality events via regression algorithms DWT analysis for different PQ events. From top to bottom and left to right: sag, oscillatory transient, sag plus oscillatory transient, swell, harmonics, and pure power signal. The energy difference is depicted vs. the decomposition level. In the case of additive noise, the method does not guarantee success in the feature extraction stage.Back to article page