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access icon free Time-domain virtual EMI receiver model algorithm for corona-originated electromagnetic interference of dc transmission line

  • Author(s): Yong Yi 1, 2 ; Zhengying Chen 2 ; Liming Wang 1, 2
    • View affiliations
  • Source: Volume 12, Issue 5, August 2018, p. 603 – 608
    DOI:  10.1049/iet-smt.2017.0495 , Print ISSN 1751-8822, Online ISSN 1751-8830
© The Institution of Engineering and Technology
Received 07/11/2017, Accepted 07/02/2018, Revised 10/01/2018, Published 19/02/2018

A time-domain virtual electromagnetic interference (EMI) receiver model algorithm for corona-originated EMI of dc transmission line is proposed. The presented model is based on short-time fast Fourier transform (FFT) and digital quasi-peak, peak and average detector algorithms together with the measured corona current. The virtual EMI receiver model algorithm is verified by comparing with measurement results of conducted interference of the three regular waveforms. The influences of computational accuracy on the conducted interference are discussed. Through utilising the laboratory-scale corona cage to generate corona current, the 0.5 MHz excitation current is calculated by using short-time FFT and excitation function theory. The measured and computational average value, root mean square value, quasi-peak value and peak value of EMI receiver response to corona current sequence are obtained. It is found that computations of radio interference have a good agreement with the measured results.

Inspec keywords: electromagnetic devices; corona; power transmission lines; electromagnetic interference; DC transmission networks; time-domain analysis; fast Fourier transforms

Other keywords: excitation function theory; corona-originated electromagnetic interference; DC transmission line; time-domain virtual EMI receiver model algorithm; digital quasipeak detector algorithm; peak and average detector algorithm; short-time fast Fourier transform; frequency 0.5 MHz; electromagnetic interference; FFT; laboratory-scale corona cage; corona current measurement; root mean square value

Subjects: d.c. transmission; Electromagnetic device applications; Electromagnetic compatibility and interference; Integral transforms; Gas discharges; Gaseous insulation, breakdown and discharges

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