Modeling the high frequency behavior of the Rogowski-coil passive L/r integrator current transducer with analytical and finite element method

Tamas Orosz, Zoltan Adam Tamus, Istvan Vajda

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

5 Citations (Scopus)

Abstract

The Rogowski current transducers are widely used because they have several advantages over iron-cored devices: no saturation at high current, higher operating frequency and less error in wider measurement range. The main components of these current transducers are the measuring coil and integrator. Latter can be passive or active. The main advantage of passive integrator is the wider bandwidth. The simplest is the L/r integration method, where the coil itself makes the operation of integration. In this case the knowledge of the resistance and the inductance of the coil not enough to make a proper equivalent circuit model, because the upper limit of the frequency characteristic depends on the distributed capacitance of the winding. The paper [1] has showed a new analytical model, which takes the distributed capacitance of the windings into consideration. The knowledge of distributed capacitances enables to calculate the upper frequency bandwidth limit and can help to determine the phase error decrease at normal frequencies. This analytical model is based on the classical lumped parameter winding model [2], which originally designed for large power transformers and assumes continuous voltage distribution along the windings. In this paper, the authors present a finite element method for calculation of distributed capacitances of winding, where the discrete behavior of the turns is taken into consideration to make a novelty for the estimation of the upper frequency limit, which cannot be determined correctly from the analytical calculation.

Original languageEnglish
Title of host publicationProceedings of the Universities Power Engineering Conference
PublisherIEEE Computer Society
ISBN (Electronic)9781479965571
DOIs
Publication statusPublished - Oct 22 2014
Event49th International Universities Power Engineering Conference, UPEC 2014 - Cluj-Napoca, Romania
Duration: Sep 2 2014Sep 5 2014

Publication series

NameProceedings of the Universities Power Engineering Conference

Conference

Conference49th International Universities Power Engineering Conference, UPEC 2014
CountryRomania
CityCluj-Napoca
Period9/2/149/5/14

Keywords

  • analytical model of windings
  • bandwidth of Rogowski-coil
  • capacitance of windings
  • current transducer
  • finite element method

ASJC Scopus subject areas

  • Energy Engineering and Power Technology

Fingerprint Dive into the research topics of 'Modeling the high frequency behavior of the Rogowski-coil passive L/r integrator current transducer with analytical and finite element method'. Together they form a unique fingerprint.

  • Cite this

    Orosz, T., Tamus, Z. A., & Vajda, I. (2014). Modeling the high frequency behavior of the Rogowski-coil passive L/r integrator current transducer with analytical and finite element method. In Proceedings of the Universities Power Engineering Conference [6934663] (Proceedings of the Universities Power Engineering Conference). IEEE Computer Society. https://doi.org/10.1109/UPEC.2014.6934663