Method of measuring the distance of a fault on a line taking account of distributed capacitances
US4568872A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1983 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | May 24, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/265
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention concerns a method of direct measurement of a parameter characterizing a fault on an electricity line 1, such as the distance x or the resistance R.sub.d of the fault, the method being based on Ohm's Law including the line inductance L and the resistances R, R.sub.d. The signals respectively associated with the variation of current i(t) and of voltage v(t) at the measuring point M are operated upon by transfer functions the ratio of which is equal to: EQU (2/.tau.) tan .omega..tau./2, .tau. corresponding to the propagation time of a wave over double the distance between the measuring point M and a zone boundary P. The method thus takes into account the distributed capacitances C of the line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.