Auto-correlation function of PD pulses under electrical treeing degradation

Author

Okamoto, Tatsuki ; Tanaka, Toshikatsu

Author_Institution

Central Res. Inst. of Electr. Power Ind., Yokosuka, Japan

Volume

2

Issue

5

fYear

1995

fDate

10/1/1995 12:00:00 AM

Firstpage

857

Lastpage

865

Abstract

Pulse correlation in PD signals was analyzed with auto-correlation function of PD pulses occurring in tree channels at 50 Hz ac voltage application as well as PD pulses occurring in several simple model electrodes. It was clarified that the auto-correlation function of PD pulse trains was strongly affected by void shape including tree length. It was found that even simple model electrodes, which showed very similar φ-q distribution patterns to those of tree channels, had different auto-correlation functions from those of PD pulse trains of tree channels. The results suggest that the auto-correlation function may give additional information about the PD mechanism to that given by the φ-q distribution patterns

Keywords

correlation methods; insulation testing; life testing; partial discharges; trees (electrical); PD pulses; auto-correlation function; distribution patterns; electrical treeing degradation; insulation diagnosis; model electrodes; pulse trains; tree channels; tree length; void shape; Autocorrelation; Degradation; Electric breakdown; Electrodes; Epoxy resins; Insulation; Partial discharges; Pulse measurements; Pulse shaping methods; Shape measurement;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.469979

Filename

469979