On-line fault location system for 66 kV underground cables with fast O/E and fast A/D technique

Author

Inoue, N. ; Tsunekage, T. ; Sakai, S.

Author_Institution

Mitsubishi Cable Ind. Ltd., Tokyo, Japan

Volume

9

Issue

1

fYear

1994

fDate

1/1/1994 12:00:00 AM

Firstpage

579

Lastpage

584

Abstract

A fault location system, which continuously monitors a 66 kV underground transmission line and instantaneously locates the distance to the point of fault at a ground fault, is being developed. A prototype system for straight lines was developed as the first step. The surge current which flows, at a ground fault, from the point of fault to each end of the line is detected by a fast optical current transformer based on the Faraday effect. The detected surge current is converted to digital data through a fast O/E converter and a fast A/D converter, and the distance to the point of fault is determined from the time difference of arrival of surge currents to both ends. A location test was carried out on single phase coaxial cable of 1000 m long. The average location error of the system is below 10 m

Keywords

current transformers; fault location; optical sensors; power cables; power engineering computing; power transmission lines; surges; underground cables; underground transmission systems; 66 kV; A/D converter; Faraday effect; O/E converter; average location error; ground fault; on-line fault location system; optical current transformer; single phase coaxial cable; surge current; underground cables; underground transmission line; Cables; Current transformers; Faraday effect; Fault detection; Fault location; Image motion analysis; Prototypes; Surges; Time difference of arrival; Transmission lines;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.277731

Filename

277731