Frequency Response of MV Voltage Transformer Under Actual Waveforms

A setup for the measurement of the frequency response of voltage measurement transformers under actual waveform conditions is presented. It is based on a two-step procedure that makes use of high voltage gas insulated capacitors and a digital bridge. It allows calibrations using distorted waveforms,...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2017-06, Vol.66 (6), p.1146-1154
Main Authors: Crotti, Gabriella, Gallo, Daniele, Giordano, Domenico, Landi, Carmine, Luiso, Mario, Modarres, Mohammad
Format: Article
Language:English
Subjects:
Calibration
Capacitors
Current measurement
Electric potential
Electrical measurement
Frequency measurement
Frequency response
Harmonic analysis
High voltages
measurement uncertainty
medium voltage (MV)
Phase measurement
Voltage measurement
Voltage transformers
voltage transformers (VTs)
Waveforms
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Summary:A setup for the measurement of the frequency response of voltage measurement transformers under actual waveform conditions is presented. It is based on a two-step procedure that makes use of high voltage gas insulated capacitors and a digital bridge. It allows calibrations using distorted waveforms, with a fundamental tone at medium voltage level and superimposed harmonics up to 20% and 15 kHz. Combined standard uncertainty in the measurement of the voltage transformer (VT) error is estimated at 200 μV/V for the ratio error and 300 μrad for the phase displacement up to 10 kHz. First applications to the measurement of the frequency response of VTs with different rated primary voltages up to 50 kV are presented.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2017.2652638