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A Simple Calibration Procedure for an LPIT plus PMU System Under Off-Nominal Conditions

1
Department of Electrical, Electronic and Information Engineering Alma Mater Studiorum, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
2
Institute for Automation of Complex Power Systems, E.ON Energy Research Center, RWTH University Mathieustrasse 10, 52074 Aachen, Germany
*
Author to whom correspondence should be addressed.
This paper is an extended version of our paper published in: A. Mingotti, L. Peretto, R. Tinarelli, A. Angioni, A. Monti and F. Ponci, “Calibration of Synchronized Measurement System: from the Instrument Transformer to the PMU”, IEEE proc. of “Applied Measurements for Power Systems”, AMPS, Sep. 2018.
Energies 2019, 12(24), 4645; https://doi.org/10.3390/en12244645
Received: 11 November 2019 / Revised: 28 November 2019 / Accepted: 5 December 2019 / Published: 6 December 2019
This work deals with two paramount devices when Smart Grids are concerned: phasor measurement units (PMUs) and low-power instrument transformers (LPITs). In particular, a simple calibration procedure to test the measurement chain PMU + LPIT has been developed. The procedure involves steady-state conditions of the grid and off-nominal input signals for testing current, voltage, frequency, and rate of change of frequency (ROCOF). In addition, the procedure includes a preliminary testing of the PMU without the LPIT to understand the influence of the latter. The procedure is then applied to a specific case study: a low-cost PMU developed by the authors and one of the most common LPITs adopted in Italian medium voltage networks. The obtained results are promising for two reasons. First, the low-cost PMU works correctly even in off-nominal conditions of the grid; second, the presented calibration procedure demonstrated to be effective and applicable to very common equipment, using a rather simple test setup. View Full-Text
Keywords: phasor measurement unit; low-power instrument transformer; nonconventional instrument transformer; metrological characterization; power quality; harmonics; non-sinusoidal; calibration procedure phasor measurement unit; low-power instrument transformer; nonconventional instrument transformer; metrological characterization; power quality; harmonics; non-sinusoidal; calibration procedure
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MDPI and ACS Style

Mingotti, A.; Peretto, L.; Tinarelli, R.; Angioni, A.; Monti, A.; Ponci, F. A Simple Calibration Procedure for an LPIT plus PMU System Under Off-Nominal Conditions. Energies 2019, 12, 4645. https://doi.org/10.3390/en12244645

AMA Style

Mingotti A, Peretto L, Tinarelli R, Angioni A, Monti A, Ponci F. A Simple Calibration Procedure for an LPIT plus PMU System Under Off-Nominal Conditions. Energies. 2019; 12(24):4645. https://doi.org/10.3390/en12244645

Chicago/Turabian Style

Mingotti, Alessandro; Peretto, Lorenzo; Tinarelli, Roberto; Angioni, Andrea; Monti, Antonello; Ponci, Ferdinanda. 2019. "A Simple Calibration Procedure for an LPIT plus PMU System Under Off-Nominal Conditions" Energies 12, no. 24: 4645. https://doi.org/10.3390/en12244645

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