TY - JOUR
T1 - A comparative assessment of two techniques for modal identification from power system measurements
AU - Browne, Timothy James
AU - Vittal, Vijay
AU - Heydt, Gerald Thomas
AU - Messina, Arturo Roman
N1 - Funding Information:
Manuscript received January 4, 2008; revised April 23, 2008. This work was supported by the Power Systems Engineering Research Center under Grant NSF EEC-0001880. Paper no. TPWRS-00996-2007.
PY - 2008
Y1 - 2008
N2 - Power system oscillatory behavior can be analyzed in terms of modes, expressed as exponentially modulated sinusoids, exhibited in signals measured on the system. These signals are driven by the behavior of a large, nonlinear, time-variant system. In this paper, two modal identification methods are examined comparatively: Prony analysis and a method based on the Hilbert transform. Considerable structural differences exist between the two methods. Prony analysis yields modes which are directly expressed as exponentially modulated sinusoids, whereas the Hilbert method provides a more general solution. Synthetic and measured signals are used in the comparison. Some general conclusions are drawn from the analysis of several signals, including two sets of measured field data.
AB - Power system oscillatory behavior can be analyzed in terms of modes, expressed as exponentially modulated sinusoids, exhibited in signals measured on the system. These signals are driven by the behavior of a large, nonlinear, time-variant system. In this paper, two modal identification methods are examined comparatively: Prony analysis and a method based on the Hilbert transform. Considerable structural differences exist between the two methods. Prony analysis yields modes which are directly expressed as exponentially modulated sinusoids, whereas the Hilbert method provides a more general solution. Synthetic and measured signals are used in the comparison. Some general conclusions are drawn from the analysis of several signals, including two sets of measured field data.
KW - Dynamics
KW - Empirical mode decomposition (EMD)
KW - Hilbert transforms
KW - Hilbert-Huang method
KW - Interarea oscillations
KW - Power system dynamic stabilityPpower system measurements
KW - Power systems
KW - Prony analysis
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U2 - 10.1109/TPWRS.2008.926720
DO - 10.1109/TPWRS.2008.926720
M3 - Article
AN - SCOPUS:49249094613
SN - 0885-8950
VL - 23
SP - 1408
EP - 1415
JO - IEEE Transactions on Power Systems
JF - IEEE Transactions on Power Systems
IS - 3
ER -