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Prony Analysis for Power System Transient Harmonics

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.

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Correspondence to Li Qi.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://doi.org/creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Qi, L., Qian, L., Woodruff, S. et al. Prony Analysis for Power System Transient Harmonics. EURASIP J. Adv. Signal Process. 2007, 048406 (2007). https://doi.org/10.1155/2007/48406

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Keywords

  • Information Technology
  • Prior Knowledge
  • Power System
  • Quantum Information
  • Induction Motor