Fault direction calculation during current transformer saturation
US11474139B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 2019 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Jun 21, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H1/0007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Improvements in the functioning of a line-mounted device to calculate a direction to a fault during current transformer (CT) saturation are disclosed herein. The line-mounted device may determine a load direction using voltage and current zero-crossings and a power system frequency before the fault condition. The line-mounted device may determine a fault direction in relation to the direction to the load after calculating and removing direct current (DC) components of a sampled current signal using valid sample pairs obtained during unsaturated regions of peaks of the sampled current signal. The line-mounted device may indicate the direction to the fault. A system of line-mounted devices may be used to determine a faulted section of a power system using indications of fault direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.