The invention discloses a method for inhibiting
corona discharge and
dirt accumulation of a direct-current
transmission line and a
dielectric film-coated
electrode wire. The surface of the
electrode wire is coated with a
dielectric layer;
dielectric barrier
discharge is formed when
corona discharge occurs on the
electrode wire; in the discharge process, heteropolar charges are continuously attached and accumulated on the outer surface of the
dielectric layer, the directions of an original
electric field of the electrode wire and an
electric field generated by the heteropolar charges are opposite, the heteropolar charge
electric field weakens the original electric field, and
corona discharge can be stopped when the intensity of a synthesized electric field is lower than the intensity of a corona inception field;
dielectric barrier discharge is formed, so that the electric
field intensity around the electrode wire is reduced,
corona discharge is inhibited, the charge quantity of space
dirt particles is reduced, the electrostatic force for driving the space
dirt particles to be charged to sink and accumulate dirt is reduced, and the dirt accumulation is inhibited. The method is beneficial to suppression of
corona discharge of the high-
voltage direct-current
transmission line, reduction of corona loss, improvement of an
electromagnetic environment, reduction of accumulated
pollution, and reduction of external insulation
pollution flashover and equipment breakdown risks.