Study on Lightning Protection Methods for Wind Turbine Blades

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  • Naka Takehiro
    Interdisciplinary Graduate school of Engineering Sciences, Kyushu University
  • Vasa Nilesh J.
    Interdisciplinary Graduate school of Engineering Sciences, Kyushu University
  • Yokoyama Shigeru
    Interdisciplinary Graduate school of Engineering Sciences, Kyushu University Central Reserch Institute of Electric Power Industry (CRIEPI)
  • Wada Atsushi
    Central Reserch Institute of Electric Power Industry (CRIEPI)
  • Asakawa Akira
    Central Reserch Institute of Electric Power Industry (CRIEPI)
  • Honda Hideki
    Central Reserch Institute of Electric Power Industry (CRIEPI)
  • Tsutsumi Kazuhisa
    Mitsubishi Heavy Industries, LTD.
  • Arinaga Shinji
    Mitsubishi Heavy Industries, LTD.

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  • Study on Lightning Protection Method for Wind Turbine Blades

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Abstract

Lightning protection measures for wind turbines are becoming important as the use of wind turbines is increasing rapidly along with its capacity and height. In order to understand the manner of lightning attachment to wind turbine blades, experiments with various types of blade samples were conducted. Experimental studies revealed following issues. Regarding a non-conductive blade sample, the 50% flashover voltage of polluted blade sample was reduced by 10% as compared to a non-pulluted blade sample. Creeping discharges on the polluted blade samples occurred more frequently, and penetrated through the surface, damaging the blade sample. The blade sample with a receptor system showed lower protection performance than the blade covered with a conducting cap.

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