This paper investigates the influence of wideband noise on the accuracy of phasor, frequency, and Rate of Change Of Frequency (ROCOF) estimators returned by the Taylor Weighted Least Squares (TWLS) algorithm. Both static and dynamic operating conditions are considered, according to specifications of the IEEE Standard C37.118.1-2011 for synchrophasor measurements in power systems and its Amendment IEEE Standard C37.118.1a-2014. In particular, the effect on estimation accuracy of both the observation interval length and the number of acquired samples/nominal cycle is analyzed by considering as worst case the mean plus twice the standard deviation of the estimation errors. The achieved values are compared with the results achieved when processing noiseless waveforms and the thresholds specified in the above Standards documents. The performed comparison shows that the impact of wideband noise on the estimated phasor parameters can be relevant even though the signal-to-noise ratio is quite high.

Sensitivity analysis of weighted-least-squares dynamic phasor estimator to wideband noise / Petri, Dario; Belega, Daniel. - ELETTRONICO. - (2015), pp. 1-6. (Intervento presentato al convegno 2014 AEIT Annual Conference - From Research to Industry: The Need for a More Effective Technology Transfer, AEIT 2014 tenutosi a Trieste, Italia nel 18th-19th September 2014) [10.1109/AEIT.2014.7002036].

Sensitivity analysis of weighted-least-squares dynamic phasor estimator to wideband noise

Petri, Dario;
2015-01-01

Abstract

This paper investigates the influence of wideband noise on the accuracy of phasor, frequency, and Rate of Change Of Frequency (ROCOF) estimators returned by the Taylor Weighted Least Squares (TWLS) algorithm. Both static and dynamic operating conditions are considered, according to specifications of the IEEE Standard C37.118.1-2011 for synchrophasor measurements in power systems and its Amendment IEEE Standard C37.118.1a-2014. In particular, the effect on estimation accuracy of both the observation interval length and the number of acquired samples/nominal cycle is analyzed by considering as worst case the mean plus twice the standard deviation of the estimation errors. The achieved values are compared with the results achieved when processing noiseless waveforms and the thresholds specified in the above Standards documents. The performed comparison shows that the impact of wideband noise on the estimated phasor parameters can be relevant even though the signal-to-noise ratio is quite high.
2015
2014 AEIT Annual Conference. From Research to Industry: The Need for a More Effective Technology Transfer (AEIT)
Piscataway, NJ
Institute of Electrical and Electronics Engineers Inc.
9788887237238
Petri, Dario; Belega, Daniel
Sensitivity analysis of weighted-least-squares dynamic phasor estimator to wideband noise / Petri, Dario; Belega, Daniel. - ELETTRONICO. - (2015), pp. 1-6. (Intervento presentato al convegno 2014 AEIT Annual Conference - From Research to Industry: The Need for a More Effective Technology Transfer, AEIT 2014 tenutosi a Trieste, Italia nel 18th-19th September 2014) [10.1109/AEIT.2014.7002036].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/148349
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