OPERATING STATE ESTIMATING DEVICE FOR ELECTRICAL APPARATUS, OPERATING STATE ESTIMATING METHOD FOR ELECTRICAL APPARATUS, PROGRAM, FEATURE VECTOR REGISTRATION DEVICE FOR ELECTRICAL APPARATUS, FEATURE VECTOR REGISTRATION METHOD FOR ELECTRICAL APPARATUS, SERVER APPARATUS, AND OPERATING STATE ESTIMATING SYSTEM FOR ELECTRICAL APPARATUS

摘要

An object of the present invention is to accurately perform the estimation of the operating states of a plurality of electrical apparatuses connected to power lines - that is, power usage. Current and voltage are measured on a time series basis by using the power lines to which the plurality of electrical apparatuses are connected. Power frequency and a harmonic signal component are extracted from the time series of the current and voltage. Admittance vector time series is calculated from the signal component. The admittance vector time series is compared to a combination of feature vectors of the plurality of electrical apparatuses connected to the power lines so as to obtain results of the estimation of the operating states of the plurality of electrical apparatuses.