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  • Research Article
  • Open Access

On the Empirical Estimation of Utility Distribution Damping Parameters Using Power Quality Waveform Data

EURASIP Journal on Advances in Signal Processing20072007:095328

  • Received: 30 April 2006
  • Accepted: 24 December 2006
  • Published:


This paper describes an efficient yet accurate methodology for estimating system damping. The proposed technique is based on linear dynamic system theory and the Hilbert damping analysis. The proposed technique requires capacitor switching waveforms only. The detected envelope of the intrinsic transient portion of the voltage waveform after capacitor bank energizing and its decay rate along with the damped resonant frequency are used to quantify effective X/R ratio of a system. Thus, the proposed method provides complete knowledge of system impedance characteristics. The estimated system damping can also be used to evaluate the system vulnerability to various PQ disturbances, particularly resonance phenomena, so that a utility may take preventive measures and improve PQ of the system.


  • Resonant Frequency
  • Impedance Characteristic
  • Power Quality
  • Capacitor Bank
  • Estimate System


Authors’ Affiliations

Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712, USA
Department of Signals and Systems, Chalmers University of Technology, Gothenburg, 412 96, Sweden


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© Kyeon Hur et al. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.