Application of the inductive high current testing transformer for supplying of the measuring circuit with distorted current

Application of the inductive high current testing transformer for supplying of the measuring circuit with distorted current

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IET Electric Power Applications — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

The increasing number of non-linear loads and renewable energy sources causes a decrease in the power quality in the power networks. Therefore, tests of current transformers should be performed in similar conditions. This requires generation by a high current testing transformer of distorted currents that rms values are from a few hundred to several thousands of amperes with a given harmonics levels. However, its frequency band of operation is limited by inductances of its windings and connected load that result from the length and parameters of the used current track and connected device under test. To ensure the constant rms value of higher harmonic of distorted secondary current with the increase of its frequency proportional increase of the rms value of this harmonic in distorted primary voltage of the high current testing transformer is required. However, the maximum permissible value of primary voltage is limited by the dielectric strength of insulation of the primary winding. The purpose of presented studies is to determine the factors that condition the frequency band of operation of a high current testing transformer and limits the range of higher harmonics while testing of the transformation accuracy of instrument current transformers for distorted currents.


    1. 1)
      • 1. Emanuel, A.E., Orr, J.A.: ‘Current harmonics measurement by means of current transformers’, IEEE Trans. Power Deliv., 2007, 22, (3), pp. 13181325.
    2. 2)
      • 2. Kaczmarek, M.: ‘Measurement error of non-sinusoidal electrical power and energy caused by instrument transformers’, IET Gener. Transm. Distrib., 2016, 10, (14), pp. 34923498.
    3. 3)
      • 3. Kondrath N. Kazimierczuk, M.: ‘Bandwidth of current transformers’, IEEE Trans. Instrum. Meas., 2009, 58, (6), pp. 20082016.
    4. 4)
      • 4. EN50160: ‘Voltage characteristics of public distribution systems’, 2010.
    5. 5)
      • 5. IEEE C.57.13: ‘IEEE standard requirements for Ins. Trans.’, 2008.
    6. 6)
      • 6. IEC 61869-2: ‘Ins. Trans. – additional requirements for current transformers’, 2012.
    7. 7)
      • 7. IEC 61869-6: ‘Ins. Trans. – part 6: additional general requirements for low-power instrument transformers’, 2016.
    8. 8)
      • 8. Kaczmarek, M.: ‘The source of the inductive current transformers metrological properties deterioration for transformation of distorted currents’, Electr. Power Syst. Res., 2014, 107, pp. 4550.
    9. 9)
      • 9. Kaczmarek, M.: ‘A practical approach to evaluation of accuracy of inductive current transformer for transformation of distorted current higher harmonics’, Electr. Power Syst. Res., 2015, 119, pp. 258265.
    10. 10)
      • 10. Wu, X., Tan, Y., Fang, Z., et al: ‘Electromagnetic analysis of a superconducting transformer for high current characterization of cable in conduit conductors in background magnetic field’, Cryogenics, 2017, 87, pp. 96102.
    11. 11)
      • 11. Doebbelin, R., Lindemann, A.: ‘Leakage inductance determination for transformers with interleaving of windings’, PIERS Online, 2010, 6, pp. 527531.
    12. 12)
      • 12. Zhang, J., Ouyang, Z., Duffy, M., et al: ‘Leakage inductance calculation for planar transformers with a magnetic shunt’, IEEE Trans. Ind. Appl., 2014, 50, pp. 41074112.
    13. 13)
      • 13. Mogorovic, M., Dujic, D.: ‘Medium frequency transformer leakage inductance modeling and experimental verification’. Proc. IEEE Energy Conversion Congress and Exposition, Cincinnati, USA, October 2017, pp. 419424.
    14. 14)
      • 14. Kaczmarek, M., Stano, E.: ‘Proposal for extension of routine tests of the inductive current transformers to evaluation of transformation accuracy of higher harmonics’, Int. J. Electr. Power Energy Syst. (under Review).
    15. 15)
      • 15. Kaczmarek, M., Szatilo, T.: ‘Reference voltage divider designed to operate with oscilloscope to enable determination of ratio error and phase displacement frequency characteristics of MV voltage transformers’, Measurement, 2015, 68, pp. 2231.
    16. 16)
      • 16. Hurley, W., Gath, E., Breslin, J.: ‘Optimizing the ac resistance of multilayer transformer windings with arbitrary current waveforms’, IEEE Trans. Power. Electr., 2000, 15, pp. 369376.
    17. 17)
      • 17. Sullivan, R.C., Zhang, Y. R.: ‘Simplified design method for Litz wire’. IEEE Applied Power Electronics Conf. (APEC), Fort Worth, USA, March 2014, pp. 26672674.
    18. 18)
      • 18. Wilson, R.P., Wilcock, R.: ‘Frequency dependent model of leakage inductance for magnetic components’, Adv. Electromagn., 2012, 10, pp. 18.
    19. 19)
      • 19. Zdanowski, M., Barlik, R.: ‘Analytical and experimental determination of the parasitic parameters in high-frequency inductor’, Bull. Polish Acad. Sci., Tech. Sci., 2017, 65, pp. 107112.

Related content

This is a required field
Please enter a valid email address