The invention discloses an active
lightning protection system and a use method thereof. According to the invention,
lightning arresting prevention instead of
lightning attraction in a local area is taken as a guiding idea, and the lightning arresting device can interact with the
cascade leader of lightning, so that induced charges of a blade in a
protected area are neutralized with heteropolar charges at the far end of the blade by using ground charges through the device; therefore, the inductive charge constraint of the near-
thunder cloud is reduced, and the
thunder and lightning can overflow to the
cascade pilot of
thunder and lightning in time, and the
cascade pilot is neutralized. The electric charges in the air tend to be homogenized, so that the intensity of an
electric field above a protected object cannot reach a numerical value of air breakdown, a main
discharge channel of thunder and lightning is changed, the occurrence of ground-to-ground lightning return
stroke discharge in a protection area is effectively prevented, direct lightning is avoided in the protection area, and the ground-to-ground lightning density in the
protected area is greatly reduced. Therefore, the method thoroughly changes the traditional fan lightning protection concept, is applied to the field of
wind power, and can effectively reduce the damage of blades and a
control system caused by lightning
stroke.