Title :
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
fDate :
4/1/2005 12:00:00 AM
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;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2005.1430398
