Method and device for deriving the concentration of a gas dissolved in an electrical insulation oil
US8616045B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2011 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Jan 26, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2841
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for deriving the concentration of a gas dissolved in an electrical insulating oil (2) comprises the following steps:—preparing a membrane (5) permeable to the gas, interposed between a container (7) of the oil (2) and a measuring chamber (4) that receives a part of the gas through the membrane (5);—measuring the value of gas concentration in the measuring chamber (4);—deriving an estimated value of the concentration of the gas in the oil (2) as a function of the measured value,—the measuring step comprising taking at successive measuring instants a plurality of measurements of the values of gas concentration in the measuring chamber (4);—the deriving step comprising calculating the estimated value of gas concentration in the oil (2), at an instant selected from said measuring instants, according to a non-linear function of the values measured at the selected measuring instant and at one or more of the measuring instants preceding the one selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.