The Transactions of the Korean Institute of Electrical Engineers A (대한전기학회논문지:전력기술부문A)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Test and Analysis of Fall-Of-Potential at Towers of Energized Transmission Lines

운전 중인 송전선로의 철탑 전위강하시험과 해석

  • 강연욱 (한국 전력연구원 전력계통연구소) ;
  • 이동일 (한국 전력연구원 전력계통연구소) ;
  • 심응보 (한국 전력연구원 전력계통연구소) ;
  • 김경철 (홍익대학교 전기공학과) ;
  • 최종기 (한국 전력연구원 전력계통연구소)
  • Published : 2006.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

Tower footing resistance and fault current division factor are important design factors for evaluation of the lightning performance of the transmission line and/or design of the grounding electrode system. The periodic measurement of those factors are also important to verify that the grounding performance of the towers has been maintained good. However, the direct measurement of those factors in operating or energized condition is very difficult because of many practical reasons, such as the difficulty of disconnecting overhead groundwires from the tower under test. With supports by GECOL (General Electricitiy Company of Libya), we had a special chance to conduct Fall-Of-Potential (FOP) test on the energized 220 kV transmission towers before and after disconnecting the overhead groundwires from the towers under test. In this paper, the FOP test results on the towers and the fault current division factors estimated from the comparision of the FOP tests with and without overhead groundwires were presented. The computer models for the FOP test simulations were also constructed to find that the simulated results agreed very well with the measured ones.

Keywords

References

  1. J.Fortin, H.G.Sarmiento, D.Mukhedkar, 'Field Measurement of Ground Fault Current Distribution and Substation Ground Impedance', IEEE Trans. on PD, Vol. PWRD-1, No.3, July 1986
  2. J.Fortin, H.Sarmiento, D.Mukedkar, 'Field measurement of ground fault current distribution and substation ground impedance at LG-2, Quebec,' in IEEE Trans. On PD, vol. PWRD-1, no.3, July 1986
  3. P.R.Pillai,E.P.Dick,'A Review on Testing and Evaluating Substation Grounding Systems', IEEE Trans. on PD, Vol.7, No.1, Jan. 1992 https://doi.org/10.1109/61.108889
  4. Grounding, Bonding and Shielding for Electronic Equipments and Facilities, MIL-HDBK-419A, 1987
  5. Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding Systems, ANSI/IEEE Std 81.9-1991, pp. 38
  6. F.P.Dawalibi, D.Mukhedkar, 'Optimum design of substation grounding in two-layer earth structure; Part I.Analytical study, Part II.Comparison between theoretical ？and experimental results, and Part III. Study of grounding grids performance and new electrodes configuration,' IEEE Transactions on Power Apparatus and Systems, vol. PAS-94, no. 2, pp. 252.261, 262.266, 267.272, Mar./Apr. 1975 https://doi.org/10.1109/T-PAS.1975.31849
  7. Heppe, R. J., 'Computation of potential at surface above an energized grid or other electrode, allowing for nonuniform current distribution,' IEEE Transactions on Power Apparatus and Systems, vol. PAS-98, no. 6, pp. 1978.1989, Nov./Dec. 1979 https://doi.org/10.1109/TPAS.1979.319377
  8. RESAP Users' Manual, SES, 2000
  9. MALT Users' Manual, SES, 2000
  10. F. P. Dawalibi, F. Donoso, 'Integrated Analysis Software for Grounding, EMF, and EMI', IEEE Computer Applications in Power, Vol.6, No.2, April 1993, pp. 19-24 https://doi.org/10.1109/67.207467