Location of a cable in a dc connection in a bipolar 12-pulse system for transmission of electrical energy by means of high-voltage direct current
US6570384B1 · kind B1 · utility
1Cited by
11References
18Claims
0Family size
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Key dates
| Filing date | Oct 4, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Oct 4, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/081
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dc connection (CAB1, CAB2) in a bipolar 12-pulse system for transmission of electrical energy by means of high-voltage direct current interconnects two converters, each one having two 6-pulse valve bridges (BR11, BR12, BR21, BR22) connected in series at a connection point (J1, J2). In a method for location of the cable, said cable is located by sensing of a magnetic field associated with a current flowing through the cable. The dc connection is temporarily supplied with a ground-mode current, intended for the location, and a magnetic field associated with said ground-mode current is sensed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.