Fault current calculation during transformer saturation using the waveform unsaturated region
US11162994B2 · kind B2 · utility
1Cited by
8References
20Claims
0Family size
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Key dates
| Filing date | Jan 23, 2020 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Apr 8, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H1/046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Line-mounted devices for determining fault magnitude in an electric power delivery system even under current-transformer (CT) saturation are disclosed herein. Fault magnitude is calculated using unsaturated regions of a current waveform captured by the line-mounted device. The method of determining the unsaturated regions is computationally efficient. Fictitious peaks are removed, and the unsaturated regions are determined based on fractions of the valid peaks. Fault current magnitude is calculated using sample values in the unsaturated regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.