Partial discharge activity in gas-insulated system under composite voltage

Author

Sarathi, R. ; Dubey, Vishal ; Srinivasa, Y.G.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol. Madras, Chennai, India

Volume

21

Issue

1

fYear

2006

Firstpage

499

Lastpage

500

Abstract

In the present study, the partial-discharge activity under nonstandard voltage formed by ac and dc voltages was studied. It is identified that the ac superposed with positive dc enhances the discharge activity in the medium and if the ac voltage is superposed with the negative dc, it can mitigate the discharge activity. The acoustic emission signal generated due to the partial discharges in gas-insulated systems under the composite voltage formed by ac superposed with dc voltage/ac/dc voltages, has a dominant frequency content at around 250 kHz.

Keywords

SF₆ insulation; acoustic emission; gas insulated substations; gas insulated switchgear; gas insulated transformers; partial discharges; acoustic emission signal; composite voltage; gas-insulated system; partial discharge; AC generators; Acoustic emission; Acoustic sensors; Corona; DC generators; Geographic Information Systems; Partial discharges; Power system reliability; Sulfur hexafluoride; Voltage; Acoustic emission; SF6 gas; composite voltage; gas-insulated system (GIS); partial discharge;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2005.855484

Filename

1564237