Practical Aspects of Accurate Harmonic Voltage Measurements in Transmission Systems

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Todays development trends in power systems are characterized by a continuously growing share of power electronics in all voltage levels. This has resulted in an increased awareness for voltage quality not only at distribution level but also in transmission systems. To measure voltage quality parameters at high and extra high voltage, instrument transformers can significantly affect the overall accuracy of the measurements due to their frequency-dependent transfer characteristic. The paper starts with a short introduction of the new challenges and resulting needs related to Power Quality and Electromagnetic Compatibility in transmission systems. Limits of voltage instrument transformers for the accurate measurement of voltage harmonics and general methods for its determination are described and illustrated by examples. Finally, available solutions to ensure accurate voltage harmonic measurements are presented briefly.


Original languageEnglish
Title of host publication2022 20th International Conference on Harmonics & Quality of Power (ICHQP)
Number of pages6
ISBN (print)978-1-6654-1640-5
Publication statusPublished - 1 Jun 2022


Title2022 20th International Conference on Harmonics & Quality of Power (ICHQP)
Duration29 May - 1 June 2022
LocationNaples, Italy

External IDs

Scopus 85133771056
ORCID /0000-0002-9052-3838/work/146167228



  • Instrument transformers, Voltage measurement, Power measurement, Power quality, Power system harmonics, Harmonic analysis, Frequency response