On the Long-Period Accuracy Behavior of Inductive and Low-Power Instrument Transformers
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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Sensors 2020, 20(20), 5810; https://doi.org/10.3390/s20205810
Received: 8 September 2020
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Revised: 9 October 2020
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Accepted: 12 October 2020
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Published: 14 October 2020
(This article belongs to the Special Issue Advanced Transducers and Systems for Voltage and Current Measurement)
The accuracy evaluation of instrument transformers is always a key task when proper control and management of the power network is required. In particular, accuracy becomes a critical aspect when the grid or the instrumentation itself is operating at conditions different from the rated ones. However, before focusing on the above non-rated conditions, it is important to fully understand the instrument transformer behavior at rated conditions. To this end, this work analyzed the accuracy behavior of legacy, inductive, and low-power voltage transformers over long periods of time. The aim was to find patterns and correlations that may be of help during the modelling or the output prediction of voltage transformers. From the results, the main differences between low-power and inductive voltage transformers were pointed out and described in detail.
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Keywords:
accuracy; instrument transformers; low-power instrument transformers; voltage transformers; temperature; ratio error; phase displacement
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MDPI and ACS Style
Mingotti, A.; Bartolomei, L.; Peretto, L.; Tinarelli, R. On the Long-Period Accuracy Behavior of Inductive and Low-Power Instrument Transformers. Sensors 2020, 20, 5810. https://doi.org/10.3390/s20205810
AMA Style
Mingotti A, Bartolomei L, Peretto L, Tinarelli R. On the Long-Period Accuracy Behavior of Inductive and Low-Power Instrument Transformers. Sensors. 2020; 20(20):5810. https://doi.org/10.3390/s20205810
Chicago/Turabian StyleMingotti, Alessandro, Lorenzo Bartolomei, Lorenzo Peretto, and Roberto Tinarelli. 2020. "On the Long-Period Accuracy Behavior of Inductive and Low-Power Instrument Transformers" Sensors 20, no. 20: 5810. https://doi.org/10.3390/s20205810
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