Method for detecting a disturbance along a conductor in an electricity-distribution system of the grid type
US4599556A · kind A · utility
5Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1983 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Jan 12, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S10/52
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an electrical power distribution system, line disturbances produce voltage and current travelling waves, or step-change signals, that are phase-shifted 90.degree. relative to each other. A simulation signal is derived from the current step-change signal and is in phase with the voltage step-change signal. The two in-phase signals are combined and compared with established limit values to determine when a fault occurs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.