Optimization of a High Frequency Current Transformer sensor for Partial Discharge Detection using Finite Element Analysis

Christos Zachariades, Roger Shuttleworth, Riccardo Giussani, Ross MacKinlay

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    Abstract

    High Frequency Current Transformer (HFCT)
    sensors are widely used for Partial Discharge detection due to
    their versatility, high sensitivity and wide bandwidth. This paper
    reports on a Finite Element Analysis (FEA) methodology that can
    be employed to optimize HFCT performance. The FEA model
    consists of accurate 3D representations of the sensor components.
    Two different FEA software modules were used in order to cover
    the wide operating frequency range of the sensor. The simulation
    computes the frequency response of the sensor in the range
    0.3 MHz - 50 MHz for various HFCT geometric and material
    parameters, specifically the number of winding turns, spacer
    thickness, aperture size and core material. A prototype HFCT
    was constructed and the measured response compared with that
    of the simulation. The shapes of the responses were similar, with
    the simulated sensitivity being higher than the measured
    sensitivity by 1 dB on average. The measured low frequency cutoff
    of the sensor was found to be only 0.05 MHz lower than that
    of the simulation.
    Original languageEnglish
    Pages (from-to)7526 - 7533
    Number of pages8
    JournalIEEE Sensors Journal
    Volume16
    Issue number20
    DOIs
    Publication statusPublished - 15 Aug 2016

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