6533b7cefe1ef96bd1257b87
RESEARCH PRODUCT
Metrological performances of voltage and current instrument transformers in harmonics measurements
Cataliotti A.Cosentino V.Crotti G.Giordano D.Modarres M.Di Cara D.Tinè G.Gallo D.Landi C.LuisoM.subject
instrument transformers020209 energy02 engineering and technologyInstrument TransformerHarmonic analysispower system meaurementsPhase AngleDistortionharmonics0202 electrical engineering electronic engineering information engineeringCalibrationElectronic engineeringMedicineSafety Risk Reliability and QualityInstrumentationbusiness.industry020208 electrical & electronic engineeringHarmonicPower System MeasurementcalibrationCurrent transformerMetrologyHarmonicsHarmonicbusinessSettore ING-INF/07 - Misure Elettriche E ElettronicheVoltagedescription
In the new electrical system scenario, the increasing presence of non-linear loads and renewable energy sources makes the measurement of harmonics an essential task. The accuracy of harmonic measurement firstly depends on the used instrument transformers for voltage and current sensing. Since the behavior of instrument transformers in non-sinusoidal conditions is not always well defined, this paper presents an experimental study on the metrological performances of current and voltage instrument transformers (CTs and VTs) in the presence of harmonics. Proper tests procedures are defined and measurement setups are developed for both CTs and VTs calibration. The analysis is carried out by using test waveforms composed of a fundamental and one harmonic component. The harmonic ratio and phase errors are evaluated; the distortion effects on the errors on the fundamental component measurement are also investigated. The obtained results show how the metrological performances in harmonics measurement are influenced by both amplitude and phase shift of the harmonics.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-05-01 |