On the Empirical Estimation of Utility Distribution Damping Parameters using Power Quality Waveform Data
Journal article, 2007

Efficient yet accurate methodology for estimating the system damping is described in this paper. The proposed technique is based on the 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 can quantify effective X/R ratio of the 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 the utility may take preventive measures and improve PQ the system.

X/R ratio

Hilbert transform

power quality

curve fitting

capacitor switching transient

damped resonant frequency

System damping


Kyeon Hur

The University of Texas at Austin

Surya Santoso

The University of Texas at Austin

Irene Yu-Hua Gu

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

Eurasip Journal on Applied Signal Processing

1110-8657 (ISSN) 1687-0433 (eISSN)

12 pages (Article ID 95328)-

Subject Categories

Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering



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