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High-impedance faults (HIFs) on distribution system still present the most persistent and challenging problem to protection engineers due to the fact that HIFs do not produce enough fault current, thus not detectable by conventional over-current protection devices. Previous research shows that it is possible to distinguish HIFs from other similar waveforms such as nonlinear load currents by analyzing...
In this paper, partial discharge (PD) signals in the ultra-high frequency (UHF) range were investigated. A spectrum analyzer functioning in the zero span mode was applied to capture and record the PD signal component at a specific frequency over a time interval. Different PD sources produce different PD patterns, thus it is possible to recognize the PD sources from the captured PD patterns. Here,...
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