Anomaly detection in quasi-periodic energy consumption data series: a comparison of algorithms

Energy Informatics

Table 4 Anomaly detection criteria and definition strategies adopted for each algorithm

Algorithm	Anomaly detection criterion	Anomaly definition strategy
Basic statistics	Dissimilarity	Confidence
AR	Prediction error	Absolute error
ARIMA	Prediction error	Absolute error
LOF	Dissimilarity	Confidence
OC SVM	Dissimilarity	Confidence
ISOF	Dissimilarity	Confidence
GRU	Prediction error	Absolute error
LSTM	Prediction error	Absolute error
GRU-MS	Prediction error	Likelihood
LSTM-MS	Prediction error	Likelihood
GRU-AE	Reconstruction error	Windows strategy
LSTM-AE	Reconstruction error	Windows strategy