Prony analysis is an emerging methodology that extends Fourier analysis by directly estimating the frequency. damping. strength. and relative phase of modal components present in a given signal. The ability to extract such information from transient stability program simulations and from large-scale system tests or disturbances would be quite valuable to power system engineers. This paper reports early results in the application of this method to stability program output. It also includes benchmarks against known models and a brief mathematical summary.
Prony analysis is an emerging methodology that extends Fourier analysis by directly estimating the frequency, damping, strength, and relative phase of the modal components present in a recorded signal. This paper extends earlier work that concentrated upon power system planning applications, for stability program outputs. Results are presented here for modal analysis and detailed model construction based upon response data obtained through large-scale tests of the western U.S. power system. BPA's optimal modeling program, SYSFIT, is used to supplement the measurements.
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