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Partial Discharge Characteristics on Protrusion Defects in SF6-N2 Mixture Gases
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 Title & Authors
Partial Discharge Characteristics on Protrusion Defects in SF6-N2 Mixture Gases
Jo, Hyang-Eun; Wang, Guoming; Kim, Sun-Jae; Park, Kyoung-Soo; Kil, and Gyung-Suk;
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 Abstract
Studies on a -mixture and -alternative gas has been in progress to reduce the use of gas as an insulation material of GIS (gas insulated switchgears). In this paper, we dealt with PD (partial discharge) characteristics in pure and , and their mixtures on aspects of insulation design and risk assessment for GIS. A POC (protrusion on conductor) and a POE (protrusion on enclosure) as the major defects were fabricated to simulate PD. We analyzed the DIV (discharge inception voltage), DEV (discharge extinction voltage), pulse magnitude, counts and phase distribution of PD pulse in mixtures ( 100%, 80%- 20%, 50%- 50%, 20%- 80%, and 100%) according to the IEC60270. The DIV, DEV as well as magnitude of PD pulse decreased on the POC as increase of ratio. For the POE, the DIV and DEV in ratio below 50% were the same voltages as those in 100%. In this experiment, 80%- 20% mixture could be considered with the equivalent insulation performance to a GIS.
 Keywords
;Mixture gases;PD;DIV;DEV;
 Language
Korean
 Cited by
 References
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