On the integration of lightning protection with stealth coated wind turbine blades

Authors

  • Laith Danoon,

    Corresponding author
    1. The Microwave and Communication Systems Research Group, School of Electrical and Electronic Engineering, The University of Manchester, Manchester, UK
    • Correspondence: L. Danoon, School of Electrical and Electronic Engineering, The University of Manchester, Manchester, UK.

      E-mail: Laith.Rashid@manchester.ac.uk

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  • Ahmad El-Makadema,

    1. The Microwave and Communication Systems Research Group, School of Electrical and Electronic Engineering, The University of Manchester, Manchester, UK
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  • Anthony Brown

    1. The Microwave and Communication Systems Research Group, School of Electrical and Electronic Engineering, The University of Manchester, Manchester, UK
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  • The copyright line for this article was changed on 29 September 2014 after original online publication.

ABSTRACT

In this paper, we consider the problem of reducing the radar cross section of a wind turbine blade through the application of radar absorbing material (RAM). One problem encountered by these techniques is the integration of the RAM solution with the existing lightning protection system, which is mandatory requirement to protect the blade when in operation. A common form of lightning protection is the use of conducting lightning receptors on the surface of the blade. To ensure the protection system is effective, a clearance area around the receptor may be required before any RAM treatment is applied. The size of the clearance area and the number of lightning receptors therefore potentially reduce the effectiveness of the RAM treatment. Design guidelines are given in this paper for a generic 40 m blade geometry. Some modelling results of the radar cross section and Doppler signature from a RAM treated blade are presented, and a comment is also made on the importance the blade edges have in reducing radar effects. ©2013 The Authors. Wind Energy published by John Wiley & Sons, Ltd.

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