All-optical differential current detection technique for unit protection applications

Grzegorz Fusiek, Philip Orr, Hao Wang, Pawel Niewczas

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

5 Citations (Scopus)
104 Downloads (Pure)


In this paper we demonstrate a novel, all-optical differential current protection scheme. By monitoring the optical power reflected from two matched hybrid fiber Bragg grating current sensors and using a simple optoelectronic threshold detector, an immediate response to an increase in differential current is achieved. A preliminary laboratory embodiment is constructed in order to characterize the performance of the scheme. The proposed technique does not require a complex sensor interrogation scheme, usually characterized by a limited sampling frequency, and thus will be capable of facilitating inexpensive and fast-acting differential protection over long distances.
Original languageEnglish
Title of host publicationProceedings of the 2013 International IEEE Conference on Instrumentation and Measurement Technology (I2MTC)
Pages1214 - 1217
Number of pages4
ISBN (Print)978-1-4673-4621-4
Publication statusPublished - May 2013
EventInternational Instrumentation and Measurement Technology Conference 2013 - Minneapolis, United States
Duration: 6 May 20139 May 2013


ConferenceInternational Instrumentation and Measurement Technology Conference 2013
Country/TerritoryUnited States


  • differential current
  • current detection
  • unit protection
  • Bragg grating

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