Partial Discharge Characteristics of Metallic Particles Under HVDC in SF6 Gas

SF6 가스 중 HVDC에서 금속 파티클의 부분방전 특성

Kim, Sun-Jae;Jo, Hyang-Eun;Wang, Guoming;Yun, Min-Young;Kil, Gyung-Suk

  • Received : 2015.10.26
  • Accepted : 2015.11.19
  • Published : 2015.12.01


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 $SF_6$ gas. PD pulses were detected through a $50{\Omega}$ 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.


Metallic particles;PD;DIV;DEV;TRPD


  1. H. E. Jo, S. J. Kim, G. M. Wang, and G. S. Kil, 2015 Spring Conference of the Korean Society for Railway, p. 25(1)-25(5).
  2. S. J. Kim, H. E. Jo, G. W. Jeong, G. S. Kil, and S. W. Kim, J. Korean Inst. Electr. Electron. Mater. Eng., 28, 40 (2015).
  3. F. H. Kreuger, Partial Discharge Detection in High-Voltage Equipment, the 1st ed. (Butterworth- Heinemann, United Kingdom, 1989) p. 135.
  4. M. S. Naidu and V. Kamaraju, High Voltage Engineering, 4th ed. (McGraw-Hill, India, 2009) p. 364.
  5. N. C. Sahoo, M.M.A. Salama, and R. Bartnikas, IEEE Trans. Dielectr. Electr. Insul., 12, 248 (2005). [DOI:]
  6. H. E. Jo, S. J. Kim, G. W. Jeong, and G. S. Kil, J. Korean Inst. Electr. Electron. Mater. Eng., 28, 320 (2015).
  7. K. H. Kim, D. Z. Lee, and H. R. Kwak, J. Korean Institute of Illuminating and Electrical Installation Engineers, 14, 67 (2000).
  8. F. N. Budiman, Y. Khan, N. H. Malik, A. A. Al-Arainy, and A. Beroual, IEEE Dielectrics and Electrical Insulation, 20, 2143 (2013). [DOI:]
  9. G. M. Wang, M. E. Thesis, p. 16, 17, Korea Maritime and Ocean University, Busan (2015).
  10. H. S. Herman, B. T. Phung, and R. B. Trevor, The Institution of Engineering and Technology, 8, 160 (2014).
  11. G. M. Wang, S. J. Kim, H. E. Jo, G. W. Jeong, and G. S. Kil, 19th International Symposium on High Voltage Engineering, p. 165(1)-165(5).

Cited by

  1. Analysis of PD Signal for Condition Monitoring of MV Switchboards by the Measurement of Transient Earth Voltage vol.19, pp.3, 2018,