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Proceedings Paper

Hybrid electro-optic/inductive current sensor for high-voltage power system applications
Author(s): Jeffrey D. Bull; Nicolas A.F. Jaeger; Farnoosh Rahmatian
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Paper Abstract

Preliminary results are reported for a novel hybrid electro-optic/inductive current sensor for high-voltage, power system applications. The sensor combines inductive current to voltage conversion with an optical modulator to provide isolated signal transmission from a high-voltage conductor to ground. The components of the sensor to be located in the high-voltage environment are passive, resulting in increased robustness over optical hybrid current sensor designs that require active electronics in the high-voltage environment. A further advantage of the passive design is that a power supply is not required in the high-voltage environment. The current sensor presented here is targeted at both revenue metering and protective relaying applications. Tests conducted in a high-current laboratory show the relative accuracy of the sensor to be stable to within from 200 A to 10 kA with phase stability within minutes of arc. Accuracy is presently limited by the temperature stability of the optical modulator which varies by about over the range from -40 to +60°C. Methods to improve the temperature stability are being investigated.

Paper Details

Date Published: 15 December 2000
PDF: 7 pages
Proc. SPIE 4087, Applications of Photonic Technology 4, (15 December 2000); doi: 10.1117/12.406372
Show Author Affiliations
Jeffrey D. Bull, Univ. of British Columbia (Canada)
Nicolas A.F. Jaeger, Univ. of British Columbia (Canada)
Farnoosh Rahmatian, NxtPhase Corp. (Canada)

Published in SPIE Proceedings Vol. 4087:
Applications of Photonic Technology 4
Roger A. Lessard; George A. Lampropoulos, Editor(s)

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