Partial discharge spectral response to variations in the supply voltage frequency

Author

Nyamupangedengu, Cuthbert ; Jandrell, Ian R.

Author_Institution

Sch. of Electr. & Inf. Eng., Univ. of the Witwatersrand, Johannesburg, South Africa

Volume

19

Issue

2

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

521

Lastpage

532

Abstract

Partial discharge (PD) spectral response to variations in the supply voltage frequency was experimentally investigated through laboratory-based tests. The PD spectral content of each defect type responded uniquely to variations in the sinusoidal supply voltage frequency in the range 20 to 400 Hz. The findings are interpreted using the theory of space charge dynamics in PD mechanisms. Prospective diagnostic applications of the findings include PD recognition using supply voltage frequency sweeps. Knowledge on supply voltage frequency dependency of partial discharges also helps in comparing PD diagnostic test results obtained at different test voltage frequencies.

Keywords

partial discharges; PD diagnostic test; PD recognition; PD spectral content; PD spectral response; frequency 20 Hz to 40 Hz; partial discharge spectral response; supply voltage frequency sweeps; test voltage frequency; Cavity resonators; Discharges; Electrodes; Insulation; Partial discharges; Stress; Surface discharges; Partial discharges; frequency spectra; supply voltage frequency;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2012.6180246

Filename

6180246