Lightning protection for blades is one of the most important factors for the safe operation of\nwind turbines. In view of the differences in the designs of blade receptors, a full-scale blade receptor\nmodel was constructed on the basis of the scaling experiment of the wind turbine and electrostatic\nfield theory. By combining the electromagnetic finite element analysis with leader discharge theory,\nthis study analyzed and discussed the influence of the protruding height of receptors and the design of\nreceptor types on the lightning receiving effect of the blade, and the optimum design scheme of blade\nreceptors was proposed. According to the results of this study, the field intensity distribution on the\nsurface of the receptor was a high-boundary and low-middle structure. The receptor easily produced\nan upward connection leader as the lighting junction. The electric field intensity around the receptor\nwas substantially distorted after 4 mm protrusion, which was approximately twice the electric field\nintensity of a flat right-angle receptor. The convex chamfer had multiple centralized lightning stroke\npoints compared with the convex right-angle design, thereby exhibiting better solidification and\nreliability at the lightning stroke area, which are conducive to protecting the blade from lightning\ndamage. The electric field intensity of the convex fillet was similar to the chamfer, but the radius\nof the electric field intensity of the convex fillet was small, and the attenuation of the electric field\nintensity with the radius was evident. This study provides a reference for further optimization design\nof blade receptors.
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