Patent ID: 9448086
Filing Date: 2016-09-20
CPC Classification: G01D,Y02B,Y04S

Claim Text:
1. A method for analyzing the electricity consumption of a site provided with a plurality of electrical devices of different types, comprising: periodically measuring a current and a voltage over at least one of the electrical phases upstream from a power supply network of the site; and processing a combination of digitized signals in order to determine the distribution of the consumption on the basis of at least some of said devices in accordance with a signature of each of said devices, wherein said processing involves comparing a waveform of the measured current with a library of presaved signatures for each of said electrical devices, said signatures comprising at least one parameter based on a waveform of the supply voltage, with the signature of each device being predetermined during a prior step that involves applying, to each device, a predetermined series of power supply sequences with voltage signals, the waveform of which represents the waveforms observed on electrical facilities and recording the current waveform resulting from the operation of said device; wherein the analysis processing comprises applying a first step of computing a Fast Fourier Transform on a current signal and a voltage signal; applying a second step of decomposing the results of the Fast Fourier transform based on the characteristic signatures of each one of said devices; and applying an additional step of validating the results of the decomposition step comprising checking the presence of time variations of the current waveforms of each one of the elements recognized.