Prony Analysis for Power System Transient Harmonics
- Li Qi1Email author,
- Lewei Qian1,
- Stephen Woodruff1 and
- David Cartes1
https://doi.org/10.1155/2007/48406
© Li Qi et al. 2007
Received: 9 August 2006
Accepted: 18 December 2006
Published: 7 February 2007
Abstract
Proliferation of nonlinear loads in power systems has increased harmonic pollution and deteriorated power quality. Not required to have prior knowledge of existing harmonics, Prony analysis detects frequencies, magnitudes, phases, and especially damping factors of exponential decaying or growing transient harmonics. In this paper, Prony analysis is implemented to supervise power system transient harmonics, or time-varying harmonics. Further, to improve power quality when transient harmonics appear, the dominant harmonics identified from Prony analysis are used as the harmonic reference for harmonic selective active filters. Simulation results of two test systems during transformer energizing and induction motor starting confirm the effectiveness of the Prony analysis in supervising and canceling power system transient harmonics.
Keywords
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Authors’ Affiliations
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