The icing of the transmission line and the various ice damage caused by the transmission seriously endanger the safe operation of our country’s power system

and most of the de-icing method requires power off

which makes the winter peak of power more intense. To address this issue

a special converter which principle is similar to current transformer is put forward

and based on this de-icing converter a new method of de-icing on power is proposed. For the multi-bundle conductor

this method can achieve de-icing without power off. Based on this theory

the simulation results are analyzed and the feasibility and superiority of this method is verified by building its simulation model in PSCAD/EMTDC.