Title :
Pattern analysis of partial discharges in SF6 GIS
Author :
Meijer, S. ; Gulski, E. ; Smit, J.J.
Author_Institution :
Delft Univ. of Technol., Netherlands
fDate :
12/1/1998 12:00:00 AM
Abstract :
The measurement of partial discharge(PD) of several faults in gas-insulated system (GIS) is discussed. Phase-resolved PD patterns have been measured using three different PD detection measuring systems: according to the IEC 270 recommendations, a VHF/UHF measuring system with narrow band filtering, and the UHF measuring system with wide band filtering. PD patterns are compared using computer-based discrimination tools. The influence of the selected center frequency on the PD patterns is discussed for the narrow band VHF/UHF measuring system. The influence of the number and type of GIS components between the discharging defect and the capacitive coupler on the shape of the PD patterns is analyzed. For several GIS components the signal reduction is studied. It was found that the shape of PD patterns is independent on the used PD detection circuit and the propagation path of the PD signals. As a result, discrimination and classification of PD distributions of several studied defects are possible using digital tools
Keywords :
SF6 insulation; UHF measurement; partial discharge measurement; SF6; SF6 GIS; fault detection; gas insulated system; narrow band VHF/UHF system; partial discharge; pattern analysis; phase resolved PD measurement; wide band UHF system; Circuit faults; Filtering; Geographic Information Systems; Narrowband; Partial discharges; Pattern analysis; Phase detection; Phase measurement; Shape; UHF measurements;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
