A new approach to voltage measurements in power systems

Comic, D.; Milovancev, S.S.; Vujičić, Vladimir

doi:10.1109/epqu.2007.4424218

Cited by 2 publications

(2 citation statements)

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“…that the voltage at the output of this transformer is proportional to first derivative of the input voltage, for frequencies up to approximately1,5 kHz. This proves the theoretical background given in [18].…”

Section: Figure 4 Simulation Model Of a High Voltage Coreless Transfosupporting

confidence: 48%

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

et al. 2016

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Original scientific paper 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 50 th order.Keywords: coreless transformer; measuring transformer; power quality measurement; power system harmonics Transformator bez jezgre za mjerenje kvalitete električne energije na srednjem naponuIzvorni znanstveni članak Mjerenje harmonika u elektrodistributivnoj mreži predstavlja važan dio mjerenja kvalitete električne energije. Suvremeni visokonaponski transformatori sa željeznom jezgrom nisu linearni i ne mogu se lako koristiti za precizno mjerenje izobličenih signala u širokom frekvencijskom opsegu. U ovom članku dani su detalji konstrukcije novog naponskog transformatora bez jezgre za mjerenje kvalitete električne energije. Kao potvrda koncepta izrađena su dva transformatora, s i bez oklopa. Prikazani su rezultati mjerenja parametara transformatora, rezultati simulacije rada transformatora i rezultati mjerenja linearnosti transformatora. Ovi rezultati pokazuju da se predloženi transformator može koristiti za mjerenje kvalitete električne energije na niskim i srednjim naponskim razinama (do 35 kV) s harmonijskim sadržajem do 50-tog reda.Ključne riječi: harmonici u elektrodistributivnoj mreži; mjerenje kvalitete električne energije; mjerni transformator; transformator bez jezgra

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Section: Figure 4 Simulation Model Of a High Voltage Coreless Transfosupporting

confidence: 48%

“…Theoretical background for this transformer is given in [18]. The simplified schematic diagram of the transformer is shown in Fig.…”

Section: Transformer Designmentioning

confidence: 99%