Double-ended distance-to-fault location system using time-synchronized positive-or negative-sequence quantities
US6879917B2 · kind B2 · utility
45Cited by
20References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 13, 2003 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Jul 11, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
When a disturbance (for example, lightning strike) occurs on a high-voltage overhead transmission line, the line must be checked for any possible damage. If the distance-to-fault is known, line crews can be quickly dispatched for any necessary repair. The present invention is a fault location method and system that uses filtered, time-synchronized positive- or negative-sequence voltage and current measurements from both ends of the overhead transmission line to determine the exact distance to the fault with respect to either end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.