Fault section detection system for 66 kV underground branch transmission lines using optical magnetic field sensors

Author

Katsuta, G. ; Muraoka, K. ; Inoue, N. ; Sakai, S. ; Tsunekage, T. ; Ando, K.

Author_Institution

Tokyo Electr. Power Co. Inc., Japan

Volume

7

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

1

Lastpage

9

Abstract

A fault section detection system that uses optical magnetic field sensors and instantly detects the section in which a ground fault occurred was developed for 66 kV underground multiterminal systems having Y-branch joint boxes. The optical magnetic field sensor, which is based on the Faraday effect in Bi-doped YIG ((BiYbGd)₃Fe₅O₁₂) having a large Verdet constant, detects cable conductor currents of 0 to 2000 A with high precision with the use of a laminated magnetic ring core of silicon steel plates. Sensors and a fault section detector/indicator of a system are connected with optical fibers capable of nonrepeated transmission of over 6 km

Keywords

fault location; fibre optic sensors; magnetic field measurement; power cables; power transmission lines; transmission networks; underground cables; 0 to 2000 A; 66 kV; Faraday effect; Verdet constant; Y-branch joint boxes; YFe5O12:Bi; YIG:Bi; conductor; fault location; fault section detection; ground fault; laminated magnetic ring core; multiterminal systems; optical magnetic field sensors; power cables; silicon steel; underground branch transmission lines; Conductors; Faraday effect; Fault detection; Iron; Magnetic cores; Magnetic sensors; Optical fiber cables; Optical sensors; Sensor systems; Silicon;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.108882

Filename

108882