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Electrical Engineering

, Volume 100, Issue 2, pp 425–434 | Cite as

Estimation of the shielding performance of transmission lines considering effects of landform, lightning polarity and stroke angle

  • Victor Jimenez
  • Johny Montaña
  • John Candelo
  • Christian Quintero
Original Paper
  • 235 Downloads

Abstract

Lightning is the main cause of transmission system outages, affecting reliability of power supply and resulting in economic losses. Shielding failure is an important issue in addressing the lightning performance of overhead transmission lines. In this paper an improved method based on the electro-geometric model is proposed to evaluate the shielding failure flashover rate (SFFOR) of transmission lines, considering the influences of landform, lightning polarity and stroke angle. In the improved method, the striking distances to phase conductors, shield wires and ground are properly differentiated by using recent equations developed to take into account other factors not only magnitude of lightning strokes. These factors include height of wires as well as lightning polarity. To reflect the effects of changes in terrain and height of wires on SFFOR, a method for identifying the topography and the relative position among the wires and ground is proposed. A 400-kV double-circuit transmission line section in complex terrain area was taken as example, and the results show that this method can reflect changes of the SFFOR along the span and can be useful to figure out which towers are easy to be struck by lightning along the entire transmission line. This research is helpful for the design and operation of overhead transmission lines.

Keywords

Shielding failure Electro-geometric model (EGM) Lightning Overhead transmission lines 

Notes

Acknowledgements

Main author would like to thank Emelson Jimenez for his contributions and support with the scholarship. Authors would like to thank Universidad del Norte for the support.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Victor Jimenez
    • 1
  • Johny Montaña
    • 2
  • John Candelo
    • 3
  • Christian Quintero
    • 4
  1. 1.WSP Colombia SASMedellínColombia
  2. 2.Universidad Técnica Federico Santa MaríaValparaísoChile
  3. 3.Universidad Nacional de ColombiaMedellínColombia
  4. 4.Universidad del NorteBarranquillaColombia

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