Optimization of Air Insulation Clearances for EHV/UHV Transmission Lines

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Pradeep M. Nirgude
B. Gunasekaran
R. S. Shivakumara Aradhya

Abstract

This paper presents the results of the study conducted on 400 kV, 800 kV and 1200 kV transmission line insulator strings and conductor–tower window geometries with an aim to optimize air insulation clearances. Laboratory investigations were carried out to evolve the switching impulse performance of phase–to–earth and conductor–window confi gurations in addition to the reference rod plane air gap lengths in EHV/UHV range. Tests were conducted on 400 kV, 800 kV and 1200 kV line confi gurations of I, Vee, double Vee, etc., by simulating the tower windows. The paper also presents results of the study on optimization of conductor-tower air insulation clearances for adoption in 1200 kV AC transmission lines using 8 bersimis conductor bundle carried out for establishment of 1200 kV Test Station at BINA, Madhya Pradesh, by Power Grid Corporation of India. Results of the tests and the data presented in the paper will be useful for design of phase-to-ground air insulation for adoption in EHV/UHV Transmission lines.

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How to Cite
Nirgude, P. M., Gunasekaran, B., & Shivakumara Aradhya, R. S. (2012). Optimization of Air Insulation Clearances for EHV/UHV Transmission Lines. Power Research - A Journal of CPRI, 41–52. Retrieved from https://node6473.myfcloud.com/~geosocin/CPRI/index.php/pr/article/view/660

References

  1. Cortina R, Garbaganti E, Pigini A, Sartorio G and Thione L. “Switching impulse strength of phase-to-earth UHV external insulation-Research at the 1000 kV project”, IEE, Trans on Power Apparatus and Systems, Vol. PAS–104, No. 11, pp. 3161–3168, November 1985.
  2. Paris L and Cortina R. “Switching and lightning impulse discharge characteristics of large air gaps and long insulator strings”, IEE, Trans. on Power Apparatus and Systems. Vol. PAS–87, No. 4, pp. 947–957, April 1968.
  3. Pokony W C and Flugun R W. “UHV Tower insulation parameters determined by full scale testing”, IEE, Trans. on Power Apparatus and Systems.Vol. PAS–94, No. 2, pp. 518–525, March–April 1975.
  4. Gallet G, Leroy G, Lacey R and Kroner I. “General expression for positive switching impulse strength valid up to extra long air gaps”, IEE, Trans. on Power Apparatus and Systems. Vol. PAS–94, No. 6, pp. 1989–1992, November–December, 1975.
  5. IEC Publication 60060-1/1989 High-Voltage test techniques-Part-1.
  6. IEC Publication 600071-1, Insulation co-ordination.
  7. Pradeep Nirgude M, Arunjothy, Shivakumar Aradhya R S, Mohan Rao N S and Chennakeshava. “Laboratory investigations on optimization of air clearances for EHV and UHV transmission”, XIIIth International Symposium on High-Voltage Engineering. Netherlands, 2003.
  8. Ramamoorty M. “Comments on the Rated Insulation Levels in EHV and UHV Systems-Possibility to Recommend Reduced Levels with Respect to IEC 71-1 and 71-3 Insulation Co-ordination”, IEC, Publication 517, CIGRE Colloquium, Tokyo, 1987.
  9. Shivakumara Aradhya R S, Parthasarathy N S, Vijayakumar S V P and Siva Sarma D V S S. “Computation of phase to phase overvoltages of typical 400 kV, 800 kV, and 1000 kV transmission lines”, International Conference on Computer Applications in Electrical Engineering, IIT Roorky, pp. 771–776, 8–11 September 1997.
  10. Pradeep Nirgude M, Rao G V, Krishna B and Gunasekaran B. “Laboratory investigations on optimization of air insulation clearances for 1200 kV transmission line”, Proceedings of 17th International Symposium on High-Voltage Engineering, ISH–2011, Hannover, Germany, August 2011.

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