A transmission line conductor suitable for live on-line melting ice and its application method

Abstract

The invention discloses a power transmission line wire suitable for live-line one-line ice melting and an application method thereof. The power transmission line wire comprises an inner core, an outer-layer twisted wire and an insulation layer, wherein the inner core, the insulation layer and the outer-layer twisted wire form a coaxial structure wire from inside to outside, the power transmissionline wire also comprises a short-circuit switch and an ice melting mechanism, the insulation layer is coated on the inner core and is used for isolating the inner core and the outer-layer twisted wire, the short-circuit switch is used for shorting or disconnecting connection between the inner core and the outer-layer twisted wire, the ice melting mechanism comprises an ice melting switch and an ice melting power supply, the ice melting power supply, the inner core, the outer-layer twisted wire and the short-circuit switch for enabling the inner core and the outer-layer twisted wire to be in ashort-circuit state form an ice melting loop when the ice melting switch is in a closed state, and the ice melting power supply is used for providing an ice melting current for the ice melting loop. Under a normal load transmission condition of the power transmission line, ice melting can be performed on the line, the influence of line stop on the system is prevented, and meanwhile, the ice melting rapidness and efficiency are greatly improved.

Description

technical field [0001] The invention relates to the field of electrical engineering, and specifically discloses a power transmission line conductor suitable for live online melting of ice and a method for using the same. Background technique [0002] Ice disaster is one of the biggest natural disasters that threaten the normal and stable operation of the power grid. Severe icing of transmission lines will lead to tower collapse and disconnection accidents in the power grid, which will cause large-scale power outages. In 2008, southern my country suffered severe ice disasters, which caused a total of 36,740 transmission lines to be out of service, 2,018 substations to be completely shut down, 8,381 base towers toppled and damaged on 110kV-500kV transmission lines, and power supply interruptions occurred in more than 170 counties (cities). A loss of 25.43 billion yuan. Among them, Hunan Power Grid, which was the most affected, had a total of 64 trips of 500kV lines and 16 tow...

AI Technical Summary

Problems solved by technology

However, at present, the large-scale use of AC and DC ice melting devices can only be carried out when the line is out of service. In winter, the grid transmission load is tense during the icing period, and the line outage itself will be subject to many conditions. At the same time, the application for line outage The transportation process takes a long time, and the switching operation is cumbersome and time-consuming. It is often impossible to melt the ice in time, which increases the risk of power grid collapse and disconnection.

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