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Partial Discharge Characteristics of Metallic Particles Under HVDC in SF6 Gas
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 Title & Authors
Partial Discharge Characteristics of Metallic Particles Under HVDC in SF6 Gas
Kim, Sun-Jae; Jo, Hyang-Eun; Wang, Guoming; Yun, Min-Young; Kil, Gyung-Suk;
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 Abstract
This paper dealt with the PD (partial discharge) characteristics produced by metallic particles presented in a gas insulated switchgear. Four types of metallic particles such as a ball, a trapezoid, a rectangle, and a twist were fabricated and placed in a PD cell filled with gas. PD pulses were detected through a non-inductive resistor. Calibration was carried out according to IEC 60270 and the sensitivity was calculated as 4 mV/pC. Apparent charge, pulse count, DIV (discharge inception voltage), DEV (discharge extinction voltage), and TRPD (time resolved partial discharge) were analyzed. Among the metallic particle types, the twist frequently occurred PD pulse at the lowest DIV, while the rectangle showed the highest. DEV of the twist was about 2 times lower than that for the rectangle. Kurtosis of ball clustered at high value, and skewness of other three metallic particles distributed at low value. TRPD showed different distribution by metallic particle types.
 Keywords
Metallic particles;PD;DIV;DEV;TRPD;
 Language
Korean
 Cited by
 References
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