Extended SINDICOMP: Characterizing MV Voltage Transformers with Sine Waves

Gabriella Crotti, Giovanni D’Avanzo, Domenico Giordano, Palma Sara Letizia and Mario Luiso
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Gabriella Crotti: Istituto Nazionale di Ricerca Metrologica (INRIM), 10135 Torino, Italy
Giovanni D’Avanzo: Dipartimento di Ingegneria, Universita degli Studi della Campania “Luigi Vanvitelli”, Via Roma 29, 81031 Aversa (CE), Italy
Domenico Giordano: Istituto Nazionale di Ricerca Metrologica (INRIM), 10135 Torino, Italy
Palma Sara Letizia: Istituto Nazionale di Ricerca Metrologica (INRIM), 10135 Torino, Italy
Mario Luiso: Dipartimento di Ingegneria, Universita degli Studi della Campania “Luigi Vanvitelli”, Via Roma 29, 81031 Aversa (CE), Italy

Energies, 2021, vol. 14, issue 6, 1-16

Abstract: The paper presents a method for the frequency characterization of voltage transformers (VTs) for medium voltage (MV) grids which involves only sine waves. It is called extended SINDICOMP, since it is an extended version of the previously developed technique SINDICOMP. It requires, in the first step, an evaluation and a compensation of the non-linearity introduced by the VT when it is supplied with a 50 Hz sinusoidal input at rated value. Then, the VT is characterized with a low voltage sinusoidal frequency sweep from the second harmonic frequency up to the first resonance frequency. Some rules to build the approximated frequency response, starting from these two sets of data, are given in the paper. The proposed approach is applied to three commercial MV VTs. Significant improvement of the VT performance is obtained, compared to the use of a frequency response obtained from the low voltage characterization.

Keywords: voltage transformer (VT); instrument transformer (IT); power system measurement; voltage measurement; harmonics; power quality (PQ); frequency response (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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