Abstract

A system for analyzing electrical consumption of a site equipped with a plurality electrical equipment. The system comprises at least one sensor for periodic measurement of global consumption of the site by measuring current and voltage signals on at least one of the electrical phases upstream of the supply network for the site. The system comprises a processor for decomposing the global consumption of the site to individual consumption of each kind of electrical equipment based on a set of signatures with each signature has power load coefficients representing power loads of the corresponding electrical equipment. The system comprises a processor for optimizing the set of signatures and power load coefficients in comparing a calculated recomposition of the individual consumption with the measured global consumption to have a smallest difference of the comparison result, while respecting physical constraints of the set of signatures and the power load coefficients.

IPC Classes  ?

• G01R 21/133 - Arrangements for measuring electric power or power factor by using digital technique

Goods & Services

Scientific apparatus and instruments; Measuring apparatus and instruments; Checking (supervision) apparatus and instruments; Digital recording media; Data processing equipment; Computers; Computer software (recorded programs); Peripherals adapted for use with computers; Detectors; Relays, electric; Diagnostic apparatus, not for medical purposes; Apparatus and equipment for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely electricity meters; All of the aforesaid goods being solely in connection with providing electricity use information to managers of industrial and commercial buildings.

Abstract

The present invention relates to a method for analyzing the electricity consumption of a site provided with a plurality of electrical devices of different types, wherein the method comprises: periodically measuring the current and the voltage over at least one of the electrical phases upstream from the 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 the devices in accordance with a signature of each of the devices. The processing involves comparing the waveform of the measured current with a library of pre-saved signatures for each of the electrical devices. The signatures comprising at least one parameter based on the waveform of the supply voltage. The signature of each device is 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 ordinary electrical facilities; and recording the current waveform resulting from the operation of said device. The invention also relates to a method for modeling a device for implementing the analysis method.

IPC Classes  ?

• G08C 15/06 - Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division
• G08C 19/20 - Electric signal transmission systems in which transmission is by pulses using a variable number of pulses in a train operating on dynamo-electric devices, e.g. step motor
• G01D 4/00 - Tariff metering apparatus

Abstract

The present invention concerns a method for analysing the electricity consumption of a site equipped with a plurality of items of electrical equipment of different kinds, comprising at least one sensor for periodically measuring the current and/or the voltage on at least one of the electrical phases upstream from the power supply network of the site, and a computer for carrying out a processing operation consisting of: - sampling at least the current signal at a frequency at least 30 times higher than the fundamental frequency of the power supply voltage - applying a Fourier transform to each fundamental period of the current signal, at least - carrying out temporal smoothing of said transformed signal by calculating a temporal mean over a characteristic period of change of behaviour of the equipment of the network (a period sufficiently long relative to the carrier period; sufficiently short not to cover several events) - forming a database of signatures designed for the site being studied during a first implementation step, - next, using said reference database of signatures to qualify the events occurring on said network. The invention also relates to a system for implementing this method.

IPC Classes  ?

• G01R 19/25 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques

Abstract

The present invention concerns a method for analysing the electricity consumption of a site equipped with a plurality of items of electrical equipment of different kinds, comprising at least one sensor for periodically measuring the current and/or the voltage on at least one of the electrical phases upstream from the power supply network of the site, and a computer for carrying out a processing operation consisting of: - sampling at least the current signal at a frequency at least 30 times higher than the fundamental frequency of the power supply voltage - applying a Fourier transform to each fundamental period of the current signal, at least - carrying out temporal smoothing of said transformed signal by calculating a temporal mean over a characteristic period of change of behaviour of the equipment of the network (a period sufficiently long relative to the carrier period; sufficiently short not to cover several events) - forming a database of signatures designed for the site being studied during a first implementation step, - next, using said reference database of signatures to qualify the events occurring on said network. The invention also relates to a system for implementing this method.

IPC Classes  ?

• G01R 19/25 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques

Abstract

The present invention concerns a contactless device for characterising the electric signal flowing in an electrical conductor, comprising an electromagnetic inductive coupling means capable of surrounding said conductor, characterised in that it further comprises means for short-circuiting the output of said inductive coupling means, said output being linked to an electronic circuit for measuring the difference in potential relative to a floating ground so as to deliver a signal representative of the voltage between the segment of said conductor passing through the device, and a fixed potential reference. It also concerns a system comprising a plurality of such contactless devices.

IPC Classes  ?

• G01R 15/06 - Voltage dividers having reactive components, e.g. capacitive transformer
• G01R 15/14 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
• G01R 21/06 - Arrangements for measuring electric power or power factor by measuring current and voltage
• G01R 15/18 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers

Goods & Services

Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; Apparatus for recording, transmission or reproduction of sound or images; Magnetic data carriers, recording discs, optical discs; Data processing equipment and computers; Computer software (recorded programs); Computer peripheral devices; Detectors; Wires, electric; Relays, electric; Diagnostic apparatus, not for medical purposes; Integrated circuit cards [smart cards]. Office functions; Arranging subscriptions to telecommunication services for others; Presentation of goods on communication media, for retail purposes; Business management and organization consultancy; Computerized file management. Engineering evaluations and appraisals in the fields of science and technology; Scientific and technical research; Design and development of computer hardware and software; Research and development of new products for others; Technical project studies; Design, installation, maintenance, updating and rental of computer software; Computer programming; Computer system analysis; Computer system design; Consultancy concerning computers; Software as a service [SaaS]; Server hosting; Energy auditing.

Abstract

The present invention relates to a method for analyzing the electricity consumption of a site provided with a plurality electrical devices of different types, wherein said method involves: periodically measuring the current and the voltage over at least one of the electrical phases upstream from the 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, characterized in that said processing involves comparing the waveform of the measured current with a library of prerecorded signatures for each of said electrical devices, said signatures comprising at least one parameter based on the waveform of the supply voltage. The signature of each device is 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 ordinary electrical facilities; and recording the current waveform resulting from the operation of said device. The invention also relates to a method for modeling a device for implementing the analysis method.

IPC Classes  ?

• G01D 4/00 - Tariff metering apparatus

Goods & Services

Business management and organisation consultancy; Computerized file management; Cost price analysis, commercial information and advice for consumers, Drawing up of statistics. Engineering evaluations, estimates and research in the field of science and technology; Design and development of computer hardware and software; Research and development of new products (for others); Technical project studies; Design, installation, maintenance, updating and rental of computer software; Computer programming; Consultancy concerning computers; Conversion of data and computer programs (except physical conversion); Conversion of data or documents from a physical storage medium to an electronic medium; Consultancy in the field of energy-saving.