Author: Gabriella Crotti

0000000000878207

AUTHOR

Gabriella Crotti

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Compensation of Nonlinearity of Voltage and Current Instrument Transformers

2019

This paper aims at characterizing and improving the metrological performances of current and voltage instrument transformers (CTs and VTs) in harmonic measurements in the power system. A theoretical analysis is carried out to demonstrate that, due to the iron core nonlinearity, CT and VT output signal is distorted even when the input signal is a pure sine wave. Starting from this analysis, a new method for CT and VT characterization and compensation is proposed. In a first step, they are characterized in sinusoidal conditions and the harmonic phasors of the distorted output are measured; in the second step, these phasors are used to compensate the harmonic phasors measured in normal operati…

uncertainty.Materials sciencepower system measurementAcousticsHarmonics020208 electrical & electronic engineeringPhasorHarmonicinstrument transformers (ITs)02 engineering and technologypower qualitySignalCurrent transformerCompensation (engineering)Harmonic analysisSine waveDistortion0202 electrical engineering electronic engineering information engineeringHarmonicElectrical and Electronic EngineeringuncertaintySettore ING-INF/07 - Misure Elettriche E ElettronicheInstrumentationIEEE Transactions on Instrumentation and Measurement

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