Optimizing Temperature Coefficient and Frequency Response of Rogowski Coils

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Abstract

This paper describes a new method for optimizing both Rogowski coil's temperature coefficient and its high frequency response. The proposed scheme is based on finding a value for coil termination resistance and for its temperature coefficient, which result in negligible change of coil output voltage versus temperature while still allowing for any damping ratio desired. The method is tested in a proof-of-concept setup with an openable, rigid Rogowski coil. The result shows that a well-damped LC-resonance of the coil is possible without having to make a compromise with temperature coefficient and vice versa. The proof-of-concept measurement is done for a broad temperature range around room temperature and works for any range where the coil's temperature expansion is sufficiently linear. At the same time, the frequency response is preserved, giving an extension of at least an order of magnitude with respect to previous work.

Original languageEnglish
Article number8022679
Pages (from-to)6646-6652
Number of pages7
JournalIEEE Sensors Journal
Volume17
Issue number20
DOIs
Publication statusPublished - 15 Oct 2017
MoE publication typeA1 Journal article-refereed

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Keywords

  • current measurement
  • inductive transducers
  • power systems
  • RLC circuits
  • smart grids
  • temperature dependence

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