Original scientific paper

https://doi.org/10.17559/TV-20150318102342

High voltage coreless transformer for power quality measurement at medium voltage level

Zoran Mitrović orcid.org/0000-0001-7660-0844 ; University of Novi Sad, Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia
Dušan Čomić ; EPS Elektrovojvodina, Bulevar oslobođenja 100, 21000 Novi Sad, Serbia
Slobodan Milovančev ; University of Novi Sad, Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia
Dragan Pejić ; University of Novi Sad, Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia

Abstract

Measurement of grid voltage harmonic components is an important part of power quality measurements. Current high voltage transformers with iron core are not linear and cannot easily be used for accurate measurement of "polluted" voltages in wide frequency range. In this paper, design details of a new coreless voltage transformer for power quality measurement are given. As a proof of concept, two transformers, shielded and unshielded, were realized. Measurement results of transformer parameters, results of transformer behaviour simulation and results of transformer linearity measurement are presented. These results show that the proposed transformer can be used for power quality measurement at low and medium voltage levels (up to 35 kV) with harmonic voltages up to 50th order.

Keywords

coreless transformer; measuring transformer; power quality measurement; power system harmonics

Hrčak ID:

167469

URI

https://hrcak.srce.hr/167469

Publication date:

13.10.2016.

Article data in other languages: croatian

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