An optically-interrogated Rogowski coil for passive, multiplexable current measurement

Philip Orr, Pawel Niewczas, Campbell Booth, Grzegorz Fusiek, Adam Dysko, Fumio Kawano, Tomonori Nishida, Phil Beaumont

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Abstract

We report on the design and implementation of a novel hybrid electro-optical sensor for electric current. An all-fibre transducer is utilised to passively interrogate an air-core coil via a low-voltage piezoelectric multilayer. Peak Bragg reflections are strain-tuned by the Rogowski emf, allowing transducer interrogation and primary current reconstruction to be performed remotely and without active electronics at the sensor. The preliminary embodiment demonstrates long-distance, passive measurement of current for metering and protection applications, and retains the fibre transducer's capability for serial multiplexing.
Original languageEnglish
Pages (from-to)2053-2054
Number of pages2
JournalIEEE Sensors Journal
Volume13
Issue number6
DOIs
Publication statusPublished - Mar 2013

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Keywords

  • fibre bragg grating
  • optical current sensor
  • Rogowski coil
  • power system instrumentation

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