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Metrological Characterization of a Signal Generator for the Testing of Medium Voltage Measurement Transducers

pubblicazioni - Articolo

Metrological Characterization of a Signal Generator for the Testing of Medium Voltage Measurement Transducers

L’articolo è volto all’analisi delle prestazioni di un generatore di segnale MT sviluppato dagli autori, in grado di applicare forme d’onda arbitrarie per la caratterizzazione del comportamento di trasduttori a fronte di armoniche.

Nowadays, voltage transducers in mediumvoltage (MV) distribution networks operate in nonsinusoidal conditions while their calibration is still based on simple sine-wave tests. A more significant characterization could be achieved using complex multitone signals. However, this requires an MV generator able to apply arbitrary voltage waveforms to the transducer under test. The authors have recently proposed a simple MV signal generator that can be effectively employed for this purpose.

In this paper, the performance of this MV generator has been carefully analyzed. A characterization procedure based on multisine excitation has been proposed and tested. In particular, the main causes of uncertainty have been identified and their impact on the accuracy of the generated voltage evaluated. The analysis considers both linear and nonlinear effects, such as harmonic distortion and hysteresis.

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