The concept of novelty detection applied to Power Quality

This paper presents a study related to a possible topology of a novelty detector to be applied in Power Systems applications. With the new scenario of Smart Grids a novelty detector should not be focused in the typical PQ disturbances but in any new deviation/variation that may happen in the signal. In this way, the traditional methodology of novelty detection, that is based on a training stage is not suitable. The proposed detection methodology divides the signal in fixed length frames and is based on the comparison of the current frame with the reference one due to an specific metric. Results for two scenarios will be shown and a Hit Rate up to 99.0% with a False Alarm 1.0% were obtained.