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The Reference Wideband Inductive Current Transformer

Author

Listed:
  • Michal Kaczmarek

    (Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-537 Lodz, Poland)

  • Piotr Kaczmarek

    (Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-537 Lodz, Poland)

  • Ernest Stano

    (Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-537 Lodz, Poland)

Abstract

The aim of this paper is to show that the developed inductive current transformer may ensure the required wideband transformation accuracy and it may be applied, as the reference source, in the measuring system for the evaluation of the transformation accuracy of inductive current transformers for harmonics of distorted current. This device ensures 5 A and 1 A RMS secondary currents to provide the opportunity to use the differential measuring setup. Such solutions are characterized by the significantly reduced measurement uncertainty in relation to the comparative measurements made between two current/voltage channels. The problems required to ensure the high wideband transformation accuracy, including the self-generation phenomenon of the low order higher harmonics to the secondary current and a too-low frequency range of operation, were overcome in the design process. The values of its ratio error and the phase displacement of the developed reference wideband inductive current transformer did not exceed ±0.2%/° up to 1 kHz, ±0.4%/° from 1 kHz up to 1.5 kHz and ±0.5%/° from 1.5 kHz up to 3 kHz, as is required to perform the test procedure in accordance with the optional requirements for the inductive current transformers defined in the new edition of the standard IEC 61869-1.

Suggested Citation

  • Michal Kaczmarek & Piotr Kaczmarek & Ernest Stano, 2023. "The Reference Wideband Inductive Current Transformer," Energies, MDPI, vol. 16(21), pages 1-13, October.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:21:p:7307-:d:1269407
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    References listed on IDEAS

    as
    1. Michal Kaczmarek & Ernest Stano, 2023. "Challenges of Accurate Measurement of Distorted Current and Voltage in the Power Grid by Conventional Instrument Transformers," Energies, MDPI, vol. 16(6), pages 1-17, March.
    2. Michal Kaczmarek & Ernest Stano, 2023. "New Approach to Evaluate the Transformation Accuracy of Inductive CTs for Distorted Current," Energies, MDPI, vol. 16(7), pages 1-15, March.
    3. Wei Chen & Jien Ma & Xiaoyan Huang & Youtong Fang, 2015. "Predicting Iron Losses in Laminated Steel with Given Non-Sinusoidal Waveforms of Flux Density," Energies, MDPI, vol. 8(12), pages 1-15, December.
    4. Michal Kaczmarek & Ernest Stano, 2023. "Review of Measuring Methods, Setups and Conditions for Evaluation of the Inductive Instrument Transformers Accuracy for Transformation of Distorted Waveforms," Energies, MDPI, vol. 16(11), pages 1-17, May.
    Full references (including those not matched with items on IDEAS)

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