SciELO - Scientific Electronic Library Online

 
vol.21 issue42Transmission network expansion planning considering weighted transmission loading relief nodal indexesSecondary voltage regulation based on average voltage control author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


TecnoLógicas

Print version ISSN 0123-7799
On-line version ISSN 2256-5337

Abstract

SOTO, Edison  and  PEREZ, Ernesto. Implementation of an analytical formulation for LEMP to assess the lightning performance of a distribution line. TecnoL. [online]. 2018, vol.21, n.42, pp.51-62. ISSN 0123-7799.  http://dx.doi.org/10.22430/22565337.778.

This paper presents the implementation of an analytical formulation to calculate the lightning electromagnetic pulse (LEMP) assuming a current wave-shape linearly rising with flat top and a transmission Line (TL) return-stroke model. It also describes the development of the expressions for the image dipoles required to calculate the vertical electric field, the azimuthal magnetic field and, specially, the horizontal electric field. The expressions to calculate the contribution of source dipoles were detailed in a previous publication by other authors. The complete formulation is used to calculate electromagnetic fields and lightning-induced voltages on a typical overhead distribution line. The results were compared with traditional formulas to calculate the LEMP (such as Rubinstein’s) and to calculate induced voltages (such as Rusck’s) showing errors below 1%. If a more complex wave shape was used (such as Heidler’s), errors below 5% were found. Additionally, the formula was employed to calculate the flashover rate of a distribution line above a ground with infinite and finite conductivity. Errors less than 5% were found compared to the results obtained in the IEEE 1410 Standard. On the other hand, the computation time required to the assessment of an overhead line indirect lightning performance is reduced by half when the analytical formula is used.

Keywords : Lightning; lightning induced voltages; distribution lines; analytical formulas; electromagnetic field; flashover rate.

        · abstract in Spanish     · text in English     · English ( pdf )