Measurement of Harmonic Impedances of Supply Systems Using Natural Disturbances
This paper presents a novel and practical method for monitoring harmonic impedances of power systems seen at load serving substations. The method uses the natural load fluctuations measured at the substation for impedance estimation. It avoids the needs for intrusive disturbances and can be used for online tracking of impedance parameters. The method has been verified through several real field measurements.
Hao Zhang, Yang Fu and Zhong Tang
S. J. Jia "Measurement of Harmonic Impedances of Supply Systems Using Natural Disturbances", Advanced Materials Research, Vols. 354-355, pp. 1321-1328, 2012