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

Alessandro Mingotti, Lorenzo Peretto, Roberto Tinarelli, Andrea Angioni, Antonello Monti and Ferdinanda Ponci
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Alessandro Mingotti: Department of Electrical, Electronic and Information Engineering Alma Mater Studiorum, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
Lorenzo Peretto: Department of Electrical, Electronic and Information Engineering Alma Mater Studiorum, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
Roberto Tinarelli: Department of Electrical, Electronic and Information Engineering Alma Mater Studiorum, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
Andrea Angioni: Institute for Automation of Complex Power Systems, E.ON Energy Research Center, RWTH University Mathieustrasse 10, 52074 Aachen, Germany
Antonello Monti: Institute for Automation of Complex Power Systems, E.ON Energy Research Center, RWTH University Mathieustrasse 10, 52074 Aachen, Germany
Ferdinanda Ponci: Institute for Automation of Complex Power Systems, E.ON Energy Research Center, RWTH University Mathieustrasse 10, 52074 Aachen, Germany

Energies, 2019, vol. 12, issue 24, 1-20

Abstract: 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.

Keywords: phasor measurement unit; low-power instrument transformer; nonconventional instrument transformer; metrological characterization; power quality; harmonics; non-sinusoidal; calibration procedure (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: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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