UHF defect evaluation in gas insulated equipment

Author

Meijer, S. ; Smit, J.J.

Author_Institution

Dept. of High Voltage Technol. & Manage., Delft Univ. of Technol., Netherlands

Volume

12

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

285

Lastpage

296

Abstract

Small defects in SF₆ gas-insulated substations like fixed particles (fixed to conductors or on spacer surfaces) or free moving particles can influence the insulation strength of the insulation system. To determine the risk of such defects on the insulation strength, identification of the PD source is one of the most important steps. In this paper, a method to identify defects based on statistical analysis of frequency spectra is introduced. Finally two examples of risk analysis of defects in GIS are shown.

Keywords

SF₆ insulation; UHF measurement; fault diagnosis; gas insulated substations; insulation testing; partial discharge measurement; risk analysis; statistical analysis; PD source identification; SF₆; UHF defect evaluation; UHF measurements; free moving particles; frequency spectra; gas insulated equipment; gas-insulated substations; insulation strength; risk analysis; risk determination; statistical analysis; Costs; Electric breakdown; Frequency; Gas insulation; Geographic Information Systems; Partial discharges; Risk analysis; Space technology; Substations; UHF measurements;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2005.1430398

Filename

1430398