Fault location in a medium-voltage network

Details Fault location in a medium-voltage network Fault location in a medium-voltage network

2000-12-27

2002-07-16

Oda, Christine K. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C702S058000

Reexamination Certificate

active

06420876

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a method and a device for fault location in a medium-voltage network according to FIG.
1
. In the following description, a medium-voltage network will be referred to as an MV network. An MV network comprises a number of lines, which may each, in turn, branch off into a number of branch lines. The lines are supplied from MV switchgear
1
in an MV station. The MV switchgear is supplied via a transformer
2
from high-voltage switchgear
3
. In an installation where the invention will be used, measurement of the common supply voltage and sum voltage of the lines is performed with the measuring devices
4
and
5
in the MV station, where also a so-called fault locator
6
is located.
Fault location in the MV network is normally an integral part of superordinate protection systems relating to faults on circuit breakers, contactors, relays etc. With the aid of various protection, monitoring and so-called expert systems, the faulty line may be determined.
By means of a method and a device according to the invention, determination of the distance to the fault on the faulty line may be performed with the aid of the values of voltage and the sum current of the lines, measured in the MV station.
The principle of distance determination according to the invention is particularly useful for cable networks but may also advantageously be used for overhead line networks.


REFERENCES:
patent: 4107778 (1978-08-01), Nii et al.
patent: 4996624 (1991-02-01), Schweitzer, III
patent: 5367426 (1994-11-01), Schweitzer, III
patent: 1954267 (1970-06-01), None
M. S. Sachdev et al., “Determining Locations of Faults In Distribution Systems”, IEE(UR)—Developments in Power System Protection, Mar. 25-25, 1997, Conference Publication No. 434, pp. 188-191.
R. K. Aggarwal et al., “An Interactive Approach To Fault Location On Overhead Distribution Lines With Load Tapes”, IEE, 1997—Developments in Power System Protection, Mar. 25-27, 1997, Conference Publication No. 434, pp. 184-187.

Affiliated with

Also associated with

Rating

Fault location in a medium-voltage network does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fault location in a medium-voltage network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fault location in a medium-voltage network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2826843