Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Switching Impulse Flashover Tests and Analysis for 765kV Jumper V-strings with Damaged Insulators

  • Choi, In-Hyuk (Power System Lab., KEPCO Research Institute) ;
  • Shin, Koo-Yong (Power System Lab., KEPCO Research Institute) ;
  • Lee, Dong-Il (Power System Lab., KEPCO Research Institute) ;
  • Lim, Jae-Sup (Power System Lab., KEPCO Research Institute) ;
  • Kim, Young-Hong (Power System Lab., KEPCO Research Institute) ;
  • Lee, Hyung-Kwon (Electrical Environment Research Center of Advanced Power Grid Research Division, Korea Electric Research Institute)
  • Received : 2012.03.01
  • Accepted : 2012.08.21
  • Published : 2013.03.01
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Abstract

The 765kV transmission line will be maintained by live-line works for efficient operation. In order to maintain the 765kV transmission lines safely by live-line works, lineman has to know switching impulse flashover characteristics of the jumper V-strings with damaged insulators in advance. In order to know the flashover characteristics this paper carried out experimental flashover mockup tests for jumper V-string with damaged insulators in the outdoors. And it suggests flashover characteristics of the 765kV jumper V-strings also. The results will be used in estimating the safety of live working for 765kV transmission lines.

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References

  1. H. G. Lee and H. J. Kim, "Flashover characteristic of Damaged Insulator Strings for Live-line works in 765kV T/L", Korean Institute of Electrical Engineers Spring Conference (20/05/2005).
  2. H. G. Lee and A. G. Obsyanikov, "A study on flashover characteristics of the 765kV transmission line during live line works", APAP 2007 Proceeding of international conference on Power System Automation and Protection, 2007. 4.
  3. D. S. Kim, J.K. Lee, M. S. Hwang, J. M. Moon, H. k. Lee, S. O. Han, "Switching Flashover Characteristics Tests and Analysis for Tension String in 765kV T/L Live Line Works", Transactions of Korean Institute of Electrical Engineers, Vol. 2010, No. 7(2010).