System and method for estimating power consumption of electric apparatus, and abnormality alarm system utilizing the same
US6816078B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2002 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Jan 15, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and a system for estimating electricity consumption of electric appliances and an abnormality alarm system, enabling estimation of individual electricity consumption of electric appliances in operation in a building or the like by a non-intrusive method, and comprising a measuring sensor (11), data extracting means (12), and estimating means (13) such as an LMC. The estimating means (13) learns based on a training set in advance, and is able to estimate individual electricity consumption of electric appliances in operation. Fundamental and higher harmonics of total load current and their phase differences from voltage are obtained by the data extracting means (12) from measurement data VA, VB, IA, IB detected by an instrument transformer (111) and an instrument current transformer (112) provided in the vicinity of a service entrance 6 of a feeder 4 to a user 2. They are inputted to the estimating means (13) as inputs, thereby estimating individual electricity consumption of the electric appliances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.