A new hybrid current sensor for high-voltage applications

TitleA new hybrid current sensor for high-voltage applications
Publication TypeJournal Article
Year of Publication2005
AuthorsBull, J. D., N. A. F. Jaeger, and F. Rahmatian
JournalPower Delivery, IEEE Transactions on
Pagination32 - 38
Date Publishedjan.
Keywords30 A to 30 kA, coils, current measurement, electric current measurement, electric sensing devices, electro-optical devices, frequency response, high-voltage application, hybrid electrooptic current sensor, hybrid sensor, inductive current sensor, integrated optic Pockels cell, integrated optics, metering, passive integrator, Pockels effect, protective relaying application, relay protection, temperature cycling test, transient response

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 deg;C range.

DOI10.1109/TPWRD.2004.833889(410) 2

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