Patent ID: 6816078
Filing Date: 2004-11-09
Classification: G01D,G01R,G06Q,Y04S

Abstract:
A method for estimating individual electricity consumption of a plurality of electric appliances used by a user, said method comprising: previously creating a model for estimating electricity consumption of each electric appliance from relationship between data concerning fundamental and higher harmonics of total load current and their phase differences from voltage from said total load current and voltage obtained from combinations of various use states of a plurality of electric appliances and electricity consumption of a plurality of said electric appliances used in obtaining said data; and obtaining electricity consumption of individual electric appliance in operation by using said model for estimating electricity consumption of each electric appliance from said fundamental and higher harmonics of said total load current and said their phase differences from voltage obtained from said total load current and voltage measured in a vicinity of a service entrance into said user.