Process and apparatus for locating faults on a line through the use of travelling wave signals
US4063162A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1976 |
| Grant date | Dec 13, 1977 |
| Priority date | — |
| Expiry date | Apr 16, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process and apparatus for locating faults on a line, wherein at least one signal (travelling-wave signal) associated with a progression thereof at the measuring location is formed from the voltage and current at a measuring location. There are formed travelling-wave signals corresponding in number to the phases or conductors in the line and decoupled from one another in relation to the line inductances and line capacitances. At least two time-integrals are formed with these travelling-wave signals or signals derived therefrom as integrands, each time integral being associated with one direction of wave-propagation on the line. These time-integrals are processed by an evaluating function which characterizes by way of its sign and magnitude the direction and distance of the fault from a predetermined reference location on the line, which function corresponds to a relationship prevailing at the fault location between the travelling waves proceeding in opposite directions on the line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.