A prototype clamp-on magneto-optical current transducer for power system metering and relaying

Author

Song, J. ; McLaren, P.G. ; Thomson, D.J. ; Middleton, R.L.

Author_Institution

Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man., Canada

Volume

10

Issue

4

fYear

1995

fDate

10/1/1995 12:00:00 AM

Firstpage

1764

Lastpage

1770

Abstract

A new type of Faraday effect based magneto-optical current transducer (MOCT) has been developed. This paper presents the theoretical background, engineering design, and test results of this clamp-on MOCT. The sensor consists of two separate clamp-on parts. This design avoids the need to break the current carrying circuit in order to have the conductor enclosed by the optical path. A feedback scheme has been designed to stabilize the light source. The MOCT has two output stages, 1 kA and 20 kA, so that it can provide current signals for both power system metering and relaying devices, The theoretical background of maintaining the light travelling through the glass prism to be linearly polarized and the analysis on the effects of dielectric and metal reflections on the linearly polarized light is presented in the appendix

Keywords

Faraday effect; electric current measurement; fibre optic sensors; magneto-optical sensors; power system measurement; power system relaying; transducers; 1 kA; 20 kA; Faraday effect; clamp-on magneto-optical current transducer; current sensor; current signals; engineering design; feedback scheme; linearly polarized light; optical fibres; power system metering; power system relaying; test results; Circuit testing; Design engineering; Faraday effect; Magnetooptic effects; Optical feedback; Optical polarization; Power engineering and energy; Power system relaying; Prototypes; Transducers;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.473382

Filename

473382