Simulation evaluation method for lightning attachment point of wind power blade

Abstract

The invention discloses a wind power blade lightning attachment point simulation evaluation method comprising the following steps: 1, importing a blade three-dimensional model, and optimizing the model; 2, setting material parameters of the model; 3, establishing a plate discharge structure according to the model, and applying an equally-spaced electrostatic field to the blade to form an air domain containing the model; 4, setting a physical boundary of an air domain; step 5, performing grid division of a surface, a body and a space on the model; step 6, performing simulation calculation on the divided model in COMSOL software, calculating induced electric fields of the blade in different attitudes, and obtaining a blade structure surface electric field intensity distribution cloud chart; and step 7, analyzing the electric field intensity of the blade surface according to the distribution cloud picture, determining a lightning attachment point, and completing simulation evaluation of the lightning attachment point. According to the simulation evaluation method, the problem that the attachment points which influence the rotation in the lightning receiving discharge process of the fan cannot be evaluated in the prior art is solved.

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