Method for melting ice in overhead line system span

The invention discloses an overhead line system cross-station ice melting method, which is realized based on an ice melting system, the ice melting system comprises an ice melting device, the ice melting device is connected to a wire outlet end of an AB-phase power supply of a middle traction substation, and a left partition station is arranged between the middle traction substation and a left traction substation; a right section post is arranged between the middle traction substation and the right traction substation, and the left traction substation, the middle traction substation and the right traction substation share a rail ground wire; the left section and the right section are respectively provided with a split-phase isolation disconnecting link. Due to the combination of the contact network impedance, the capacity of the ice melting device can be set to be small, long-line cross-site alternating-current ice melting can be achieved only by arranging one ice melting device between the continuous tractio