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• W2971234938 abstract "As the highest component of wind turbines, the blades are vulnerable to lightning damages. The existing calculation models either cannot give characteristics of lightning attachment point distributions on wind turbine blades or lack well-developed physical processes. Besides, the optimization of the blade lightning protection system design is short of the guidance of calculation results. Based on the self-consistent leader inception and propagation model, a calculation method for characteristics of lightning attachment point distributions on wind turbine blades during the development of the downward leader was proposed in this paper. The lightning strike probability of six typical locations on the 2MW wind turbine blade surface was calculated using the ratio of lightning collection area, and the maximum lightning current of tip shielding failure was defined as well. The prospective return stroke current amplitude, the downward leader original position and the blade rotational angle were taken into consideration as three independent random variables, of which the effects on distribution characteristics of lightning attachment points were also evaluated. Calculation results showed that the rotational angle significantly affected the maximum lightning current of tip shielding failure. The protection scope of the blade tip was strongly influenced by rotor orientations, while the probability of the blade tip being struck is as high as 91.13%, which is much higher than the probabilities of the other locations along the blade. What's more, the probability of lightning strike in the region far from the tip (40 meters) is about twice that of regions near the tip (20–30 meters). Compared with the actual wind farm fault statistics, the reason for the high probability being struck in the area away from the tip is mainly related to the downward lightning strike. The characteristics of lightning attachment point distributions on the wind turbine blade calculated in this paper could provide theoretical basis for the design and optimization of blade lightning protection system." @default.
• W2971234938 created "2019-09-05" @default.
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• W2971234938 date "2019-06-01" @default.
• W2971234938 modified "2023-09-23" @default.
• W2971234938 title "Characteristics of Lightning Attachment Point Distributions on Wind Turbine Blades under Downward Lightning" @default.
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• W2971234938 doi "https://doi.org/10.1109/apl.2019.8815986" @default.
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