External lightning protection system for wind turbine blades - power performance

A. S. Ayub, W. H. Siew, M. Stickland

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Previous studies conducted by the authors on the aerodynamic performance of turbine blades have shown unfavourable effects of externally mounted lightning down conductors. Owing to this, one could ask whether or not externally mounted lightning down conductors could linearly affect the power performance of the whole wind turbine as well. Therefore, this paper presents a study of the power performance of one wind turbine with an externally mounted lightning down conductor. An untwisted blade profile of NACA 4418 with and without external conductor was used on the full wind turbine model. Numerical simulations were carried out on turbine power output derived from Blade Element Momentum (BEM) theory. The results are compared and discussed. The preliminary results indicate that degradation in power performance may not be significant.
Original languageEnglish
Pages (from-to)88-94
Number of pages7
JournalCIGRE Science and Engineering
Publication statusPublished - 28 Feb 2018


  • lightning down conductor
  • power coefficient
  • wind turbine
  • wind turbine blades


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