An overhead cable ice-proof device

Abstract

The invention discloses an overhead cable ice-proof device, comprising a cable, a cable shell, a coil and a plurality of iron cores. The shell wall of the cable shell is internally provided with a cavity, the cavity is located at the lower end of the cable shell, the coil forms an eddy current winding around the plurality of iron cores, and the eddy current winding is arranged in the cavity. The eddy current winding is closely matched with the cavity, and the plurality of iron cores are uniformly arranged on the inner side of the coil.

Description

technical field [0001] The invention relates to overhead cables, in particular to a device for preventing ice hanging of overhead cables. Background technique [0002] Most of the overhead cables in China are deiced manually, which is time-consuming and labor-intensive; overhead cables can also reduce losses by changing the power flow distribution of the power grid in advance so that the line current reaches a critical value. The connection lines between 110kV and below substations can For other types of important light-load lines, parallel capacitors or reactors with sufficient capacity can be installed on the busbar of the substation at the end of the line to increase the reactive current, so as to prevent the wires from freezing and not being overwhelmed. The purpose of ice, but the cost is high, the technology is difficult, and it is not easy to realize. [0003] There are more than 30 deicing methods at home and abroad, mainly mechanical deicing and thermal deicing. D...

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Problems solved by technology

[0002] Most of the overhead cables in China are deiced manually, which is time-consuming and labor-intensive; overhead cables can also reduce losses by changing the power flow distribution of the power grid in advance so that the line current reaches a critical value. The connection lines between 110kV and below substations can For other types of important light-load lines, parallel capacitors or reactors with sufficient capacity can be installed on the busbar of the substation at the end of the line to increase the reactive current, so as to prevent the wires from freezing and not being overwhelmed. The purpose of ice, but the cost is high, the technology is difficult, and it is not easy to achieve

[0003] There are more than 30 deicing methods at home and abroad, mainly mechanical deicing and thermal deicing. Due to the influence of low temperature, ice hanging is very easy to appear on overhead cables. Since it mostly occurs in mountainous areas, mechanical deicing is almost impossible. The technology of thermal deicing is not mature, so an effective solution is needed. method

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