Self-integrating Rogowski coil for high-impulse current measurement

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

This paper presents the operating principle, the performance under impulse condition, and the design of a self-integrating Rogowski coil for measuring high-impulse currents. Oscillatory and overdamped unidirectional impulse currents are generated up to 10 kA and measured by different methods, namely, two commercial impulse current transformers, a resistive shunt, and the newly designed self-integrating Rogowski coil. For the resistive method, the voltage drop across the shunt affects the total voltage measured across the test object and causes distortion in the case of simultaneous measurement by an impulse current transformer having a small aperture. The Rogowski coil theory under impulse current conditions is presented. The concept of transmission lines is used, and the line parameters are optimized to achieve a self-integrating mode and avoid spurious effects of reflections and stray capacitances. The output voltage linearity of the designed self-integrating Rogowski coil is checked using different linear and nonlinear loads and coil termination resistances. It is found that at a termination resistance of 1 Ω, satisfactory impulse current waveforms are measured by taking the commercial impulse current transformer as a reference signal. Results reveal that the measurement errors for the current peak and front and tail times are ±2%, ≤6%, and ≤ 12%, respectively. Overdamped impulse currents are generated by different generator capacitances, where comparisons between the measured and calculated current waveform parameters have shown good agreement.

Original languageEnglish
Article number5223579
Pages (from-to)353-360
Number of pages8
JournalIEEE Transactions on Instrumentation and Measurement
Volume59
Issue number2
DOIs
Publication statusPublished - Feb 2010

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high impulse
Electric instrument transformers
Electric current measurement
coils
impulses
Capacitance
Electric potential
Measurement errors
transformers
Electric lines
shunts
waveforms
electric potential
capacitance
transmission lines
linearity
generators
apertures

Keywords

  • Impulse current generator (ICG)
  • Impulse current measurement
  • Resistive current shunt
  • Rogowski coil
  • Transient analysis
  • Transient voltage surge suppressors (TVSSs)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation

Cite this

Self-integrating Rogowski coil for high-impulse current measurement. / Metwally, Ibrahim A.

In: IEEE Transactions on Instrumentation and Measurement, Vol. 59, No. 2, 5223579, 02.2010, p. 353-360.

Research output: Contribution to journalArticle

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