Evaluation of the Accuracy and Frequency Response of Medium-Voltage Instrument Transformers under the Combined Influence Factors of Temperature and Vibration

Mohamed Agazar (), Daniela Istrate and Patrice Pradayrol
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Mohamed Agazar: LNE (Laboratoire National de Métrologie et d’Essais), 1 Rue Gaston Boissier, 75015 Paris, France
Daniela Istrate: LNE (Laboratoire National de Métrologie et d’Essais), 1 Rue Gaston Boissier, 75015 Paris, France
Patrice Pradayrol: LNE (Laboratoire National de Métrologie et d’Essais), 1 Rue Gaston Boissier, 75015 Paris, France

Energies, 2023, vol. 16, issue 13, 1-19

Abstract: Instrument transformers are largely used to measure voltages and currents in public electricity networks. Their performance is essential for Power Quality measurements. Tests and procedures to estimate the effect of single influence factors are performed according to current standards. However, the instrument transformers are exposed simultaneously to more than one factor. The standardized procedures for their characterization with combined influence factors are under construction in Europe. The work in this paper is focused on the development of a new set-up for the determination of the accuracy and frequency response of medium-voltage transformers within the combined influence factors of temperatures and vibrations. The test set-up includes a platform for the combination of temperature and vibrations, a generating system for harmonics up to 9 kHz superposed with 35 kV, 50 Hz voltage and a reference measuring system. The results of several tests carried out on a 35 kV/100 V/50 Hz voltage transformer in the presence of these influence factors are discussed in this paper. They show that the accuracy and frequency response of the voltage transformers are more influenced by temperature than by vibrations.

Keywords: accuracy; frequency response; instrument transformer; combined; temperature; vibration; medium voltage (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: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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