Models for Synchrophasor With Step Discontinuities in Magnitude and Phase: Estimation and Performance

This paper proposes models for the reference phasor in the context of phasor measurement unit calibration, under conditions of step discontinuities in magnitude and phase, along with methods to estimate the model parameters. Two parametric mathematical models, which are proposed to represent these s...

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Bibliographic Details
Published inIEEE transactions on instrumentation and measurement Vol. 68; no. 6; pp. 2007 - 2014
Main Authors Martins, Marcelo B., de Barros e Vasconcellos, Renata T., Esquef, Paulo A. A.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Calibration
Computer simulation
dynamic tests
Estimation
Frequency estimation
Iterative methods
Mathematical model
Mathematical models
Measuring instruments
Numerical methods
Numerical models
Parameter estimation
Phasor measurement units
phasor measurement units (PMUs)
Phasors
synchrophasor
Transient analysis
uncertainty
Windows (intervals)
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Summary:This paper proposes models for the reference phasor in the context of phasor measurement unit calibration, under conditions of step discontinuities in magnitude and phase, along with methods to estimate the model parameters. Two parametric mathematical models, which are proposed to represent these signals, are fitted to signal samples via an iterative numerical method. The proposed approach does not require any time adjustment of the analysis window to skip the discontinuity. The estimated parameters can be used to calculate the frequency, the magnitude, and the phase during magnitude or phase steps. During a window with the step transient, we propose reference phasors with an appropriate definition. Moreover, we quantify the errors of the phasor-related estimates, for both computer-simulated cases and laboratory measurements.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2019.2893716