Activity of moving metallic particles in prebreakdown state in GIS

Author

Ziornek, W. ; Kuffel, E.

Author_Institution

Inst. of Electr. Power Eng., Poznan Univ. of Technol., Poland

Volume

4

Issue

1

fYear

1997

fDate

2/1/1997 12:00:00 AM

Firstpage

39

Lastpage

43

Abstract

The paper presents experimental results of measurements of prebreakdown activity, caused by free metallic particles in GIS, obtained using a phase resolved partial discharge (PRPD) analysis and acoustical measurements. The numerous parameters characterizing prebreakdown activity of particles were identified and analyzed. These included phase resolved distribution of charge, maximum charge, average charge per period, or per pulse, a balance of charge in positive and negative half-wave of voltage, pulse rate (number of pulses per period) for electrical and acoustic methods. The measurements were conducted in a compartment of real GIS, and Al as well as Cu particles of different shapes were investigated. The pressure varied from 150 to 550 kPa, however most measurements were taken at 450 kPa. A discharge model which takes into account the effect of a free metallic particle in GIS is presented

Keywords

SF₆ insulation; acoustic signal processing; gas insulated substations; partial discharges; substation insulation; 150 to 550 kPa; Al; Cu; GIS; acoustical measurements; average charge; discharge model; maximum charge; moving metallic particles; phase resolved partial discharge; prebreakdown state; pulse rate; Acoustic measurements; Acoustic pulses; Geographic Information Systems; Partial discharge measurement; Partial discharges; Particle measurements; Phase measurement; Pressure measurement; Shape measurement; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.590864

Filename

590864