De-icing technology for overhead transmission line

Abstract

The invention relates to an AC / DC overhead transmission line ice-melting technology which adopts split-phase conductors. When a line needs ice-melting, the load current which is evenly distributed in every split-phase conductor under normal conditions is transferred to one or more split-phase conductors; and when the centralized single conductor has the load current to a certain extent, the ice on the conductor can be melted. The deicing purpose can be realized by adopting the alternate switching manner by melting the ice on other split-phase conductors in sequence. If the manner is adopted before the line is iced, the purpose of line-icing prevention can be achieved.

Description

Technical field [0001] The invention relates to an overhead power transmission line ice melting technology, which is suitable for the ice melting of an AC and DC overhead power transmission line using split conductors. Background technique [0002] The icing of overhead transmission lines in winter is one of the natural disasters of the power system. Due to the increased ice load on the wires, certain mechanical damage will be caused to the wires, iron towers and fittings. If the icing is severe, the wires will break and the tower will overturn, leading to a large-scale power outage. Because the accident occurred in severe winter, heavy snow blocking the mountain, or freezing of the road, the conditions for emergency repairs were very difficult, resulting in long-term power outages and heavy losses to the national economy. [0003] At present, the ice melting technology of overhead transmission lines at home and abroad can be mainly divided into three types: mechanical deicing me...

AI Technical Summary

Problems solved by technology

Due to the increased ice load on the conductors, it will cause certain mechanical damage to the conductors, iron towers and fittings. When the ice is severe, it will cause the lines to break and the towers to overturn, resulting in large-scale power outages.

Since the accident occurred in the severe winter season, the mountain was blocked by heavy snow, or the road was frozen, which made the emergency repair conditions very difficult, resulting in long-term power outages and great losses to the national economy.

Images