Title :
A new hybrid current sensor for high-voltage applications
Author :
Bull, J.D. ; Jaeger, N.A.F. ; Rahmatian, F.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada
Abstract :
This article presents a new hybrid electro-optic/inductive current sensor for metering and protective relaying applications. The sensor combines a Rogowski coil with a passive integrator located in the high-voltage environment. An integrated-optic Pockels cell (IOPC) having integrated electrodes provides optical isolation. Test results from 30 A to 30 kA show the sensor to be highly linear, exceeding 0.2% linearity standards. Temperature cycling tests show the ratio error to have a maximum value of 0.3% over the -30 to +70/spl deg/C range.
Keywords :
Pockels effect; coils; electric current measurement; electric sensing devices; electro-optical devices; frequency response; integrated optics; metering; relay protection; transient response; 30 A to 30 kA; current measurement; frequency response; high-voltage application; hybrid electrooptic current sensor; hybrid sensor; inductive current sensor; integrated optic Pockels cell; passive integrator; protective relaying application; temperature cycling test; transient response; Coils; Electrodes; Electrooptic devices; Integrated optics; Linearity; Optical sensors; Protective relaying; Temperature distribution; Temperature sensors; Testing; Current measurement; electro–optic measurements; frequency response; high-voltage techniques; integrators; transient response;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2004.833889
