Combined with the engineering data of ± 800 kV DC transmission line in heavy icing areas

and based on the theory of deicing numerical calculation

the dynamic response process of six bundle conductor under the combined effect of different span

span length and height difference is simulated by numerical method. The impact effect of conductor wire and earth wire deicing on suspension insulator string and tension insulator string under different parameters is analyzed

and the most unfavorable control factors of deicing impact effect are obtained. The results show that: under different combinations of span and height difference

the impact effect after deicing is the strongest when the span and height difference are the largest; for continuous gear

the impact effect of different gear on the conductor string of adjacent gear is the largest; the horizontal impact effect of deicing is mainly affected by the horizontal span

and the vertical impact effect is mainly affected by the height difference.