Method and apparatus for protecting a power transmission line
US5543995A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1993 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Jun 1, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/262
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for preventing reclosing of circuit breakers to reconnect a transmission line when a break fault occurs in the transmission line. A voltage at a fault point is estimated from opposite ends of the transmission line, and when those voltages are not equal, the break fault of the transmission line is determined, the break fault is displayed and the reclosing by a protective relay is prevented. By specifying a fault of the transmission line as a break fault, a recovery time of the transmission time is significantly reduced and an equipment is protected because the closing of the circuit breaker is blocked during the fault.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.