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FEATURE SPONSOR


ROPE ACCESS


HIDDEN DAMAGE DETECTION IN A ROTOR BLADE A seemingly cosmetic damage (Image 2a) in a rotor blade revealed a large interior damaged area due to an excessive exothermic reaction (Image 2b). This evaluation was possible by using an in situ inspection.


Image 2a: Seemingly cosmetic damage


Image 2b: Damaged by excessive exothermic reaction


LIGHTNING PROTECTION SYSTEM (LPS) EVALUATION The rope access technique allowed detecting and repairing a severe damage on LPS during the blade inspection. The measurement of conductivity revealed absence of conductivity that indicates an inadequate LPS performance (Image 3a). After that, the inside inspection was immediately performed and the component (aluminum conductor) responsible for the damage was replaced (Image 3b). The repairing operation was successfully finished and the full capacity of blade recovered in few hours.


Image 3a: Absence of conductivity on LPS


Image 3b: Broken conductor inside blade


DRAINAGE SYSTEM ASSESSMENT AND CLEANING The inspection detected a clogged drain hole, unclogging was performed on the fly. Illustration demonstrates water falling from inside blade (fig 3a), the main reason for the obstructed drain-hole was dust (fig 3b).


Francisco Rapazote Executive Director GRwind


www.windenergynetwork.co.uk


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