A phase angle standard

Mitrovic, Zoran

doi:10.1088/0957-0233/15/3/008

Cited by 11 publications

(4 citation statements)

References 6 publications

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“…For laboratory testing, the coreless transformer was connected to a stable voltage source [22,23] with a step up transformer. The output voltage of the integrator was measured with the system voltmeter HP3458A.…”

Section: Laboratory Test Resultsmentioning

confidence: 99%

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: Laboratory Test Resultsmentioning

confidence: 99%

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

et al. 2016

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“…As a source in the measurement system in figure 6 the device described in [15,16] was used. The main two-channel voltage and the current source characteristics are:…”

Section: Resultsmentioning

confidence: 99%

A new method for processing of basic electric values

Petrovič¹

2008

Meas. Sci. Technol.

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This paper proposes a practical new algorithm for the calculation of basic ac (alternate current) electric values: average, rms, active power and energy. Based on the value of the integration of the original input (analogue) signal, a calculation is performed using the definition formulae. The realization avoids the use of a separate circuit for sample and hold, and the analogue signal was directly introduced into the integration circuit, after which its digital equivalent is formed. The suggested measuring system was simulated, realized in a practical set-up and tested. The errors related to the signal processing and errors bound were investigated and provided. A processing precision better than 10 ppm was achieved.

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“…The most important characteristic in this application is high stability, both short-term and long-term. As part of the national ac voltage, current, power and power factor standard [9][10][11], a pair of such amplifiers has been in use for more than two years.…”

Section: Discussionmentioning

confidence: 99%