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Modeling Capacitive Low-Power Voltage Transformer Behavior over Temperature and Frequency

Department of Electrical, Electronic and Information Engineering, Guglielmo Marconi Alma Mater Studiorum, University of Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy
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Academic Editor: Vamsy P. Chodavarapu
Sensors 2021, 21(5), 1719; https://doi.org/10.3390/s21051719
Received: 9 February 2021 / Revised: 22 February 2021 / Accepted: 26 February 2021 / Published: 2 March 2021
(This article belongs to the Section Physical Sensors)
The use of capacitive dividers (CDs) in medium-voltage (MV) networks started as simple voltage detectors and as rough voltage measurement instruments for protective purposes. Now, with the spread of intelligent electronic devices and renewable energy sources at the distribution level, capacitive dividers are designed and installed to perform accurate voltage measurements. Such a requirement is mandatory when the power quality has to be assessed. Therefore, CDs are currently being used either for power frequency or for high-frequency (supraharmonic- or partial-discharge-level) measurements. In this paper, typical off-the-shelf CDs are studied and modeled to understand how they behave in a wide range of frequencies and when the temperature varies. To this purpose, specific setups and tests have been developed and performed. From the results, it is clear that with proper modeling of CDs, it is possible to exploit them for measuring phenomena in a wide range of frequencies, including the effects due to temperature variations and self-resonances. View Full-Text
Keywords: capacitive divider; modeling; setup; procedure; voltage divider; capacitor; supraharmonics; temperature; frequency; partial discharges capacitive divider; modeling; setup; procedure; voltage divider; capacitor; supraharmonics; temperature; frequency; partial discharges
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MDPI and ACS Style

Mingotti, A.; Costa, F.; Pasini, G.; Peretto, L.; Tinarelli, R. Modeling Capacitive Low-Power Voltage Transformer Behavior over Temperature and Frequency. Sensors 2021, 21, 1719. https://doi.org/10.3390/s21051719

AMA Style

Mingotti A, Costa F, Pasini G, Peretto L, Tinarelli R. Modeling Capacitive Low-Power Voltage Transformer Behavior over Temperature and Frequency. Sensors. 2021; 21(5):1719. https://doi.org/10.3390/s21051719

Chicago/Turabian Style

Mingotti, Alessandro, Federica Costa, Gaetano Pasini, Lorenzo Peretto, and Roberto Tinarelli. 2021. "Modeling Capacitive Low-Power Voltage Transformer Behavior over Temperature and Frequency" Sensors 21, no. 5: 1719. https://doi.org/10.3390/s21051719

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