Analysis of Partial Discharge Pattern of Closed Switchgear using K-means Clustering

K-means 군집화 기법을 이용한 개폐장치의 부분방전 패턴 해석

  • 변두균 (광운대학교 전기공학과, 충북대학교 중전기기 미래기술개발연구센터) ;
  • 김원종 (광운대학교 전기공학과, 충북대학교 중전기기 미래기술개발연구센터) ;
  • 이강원 (광운대학교 전기공학과, 충북대학교 중전기기 미래기술개발연구센터) ;
  • 홍진웅 (광운대학교 전기공학과, 충북대학교 중전기기 미래기술개발연구센터)
  • Published : 2007.10.01


In this study, we measured the partial discharge phenomenon of inside the closed switchgear, using ultra wide band antenna. The characteristics of $\Phi-q-n$ in the normal state are stable, and confirmed at less than 0.01, but in proceeding states, about 2 times larger. And in the abnormal state, it grew hundreds of times larger compared with normal state. According to K-means analysis, if slant of discharge characteristics is a straight line close to "0" and standard deviation is small, it is in a normal state. However if we can find a peak from K-means clusters and standard deviation to be large, it is in an abnormal state.


  1. S. Matsumoto, 'Recent technology of sensing, monitoring, diagnosis, and maintenance for aged electric power and energy system', IEEJ Trans. PE., Vol. 126, No. 6, p. 574, 2006
  2. G. C. Stone, E. A. Boulter, I. Culbert, and H. Dhirrani, 'Electrical Insulation for Rotating Machines', New York, IEEE Press, Wiley, p. 86, 2004
  3. 電氣學會, '絶緣材料の劣化と機器.ケ一ブルの絶緣劣化判定の實態', 電氣學會技術報告, No. 752, p.75, 2000
  4. S. Urabe, S. Yoshihara, T. Shirakashi, and Y. Hotoda, 'Study on aging property of hydrophobic epoxy system for outdoor insulation', Transmission and Distribution Conference and Exhibition, Vol. 3, p. 2181, 2002
  5. 河村達雄, 田中祀捷, '電氣設備の診斷技術', 電氣學會, p. 117, p. 150, 2003
  6. F. H. Kreuger, 'Partial discharge detection in high-voltage equipment', Butterworths, High-voltage engineering at the technical university, Delft, p. 29, p. 95, 1989
  7. L. Yangqing, L. Fangcheng, X. Baoan, and C. Zhiye, 'A new method using ultrasonic for partial discharge pattern recognition', ICPST, Vol. 2, p. 1004, 2002
  8. Q. Chen, Y. Wang, and X. Wie, 'The UHF method for measurement of partial discharge and interface suppression', Proc. of International Symposium on Electrical Insulating Materials 2005, Vol. 3, p. 829, 2005
  9. Y. Tian, P. L. Lewin, A. E. Davies, and Z. Richardson, 'AE detection of PD in polymeric insulation', High Voltage Engineering Symposium, Conference Publication, No. 467, C, IEEE, Vol. I, p. 82, 1999
  10. Y. Li, F. Lu, B. Xin, and Z. Chen, 'A new method using ultrasonic for partial discharge pattern recognition', Proc. of international Conference on Power System Technology 2002, Vol. 2, p. 13, 2002
  11. D. Pollard, 'Strong consistency of k-means clustering', The Annals of Statistics, Vol. 9, No. 1, p. 135, 1981