Method and device for ice coating prevention and melt ice removing on electricity transmission and distribution line

Abstract

The invention provides a method for preventing ice-coating and removing / melting ice on power transmission and distribution lines and equipment, and belongs to the brand-new technology of preventing the ice-coating on the surfaces of the power transmission and distribution lines and removing / melting the ice under the ice-coated condition. The invention adopts the high frequency pulse current heating oscillation technology (also called HFC technology hereinafter), and the equipment is composed of an HFC high-frequency chock, an HFC high-frequency current discharge device and an HFC high-frequency current generator. Through continuous high frequency current (a sine waveform or an impulse waveform) of 0.5kHz to 450kHz and 0 to 3000A loaded on the power transmission and distribution lines, the method is suitable for 6kv to 1000kv AC and DC power transmission and distribution lines. For the power transmission and distribution lines with different voltage classes, different line structures and capacities as well as different line lengths, all the power transmission and distribution lines required to have ice-coating prevention capacity in an electric network can be equipped with corresponding HFC system devices, and decided whether the corresponding HFC system devices put into operation according to the meteorological conditions; and adjustment and control are carried out according to the actual states and the parameters of the lines, so as to realize ice-coating prevention and ice removing / melting.

Description

technical field [0001] The present invention is a brand-new technology for preventing the surface of power transmission and distribution lines from being covered with ice, deicing and melting ice in the case of ice-covered conditions --- a method for heating and oscillating power transmission and distribution lines with high-frequency pulse current and using the method System devices realized by technology. [0002] How to prevent icing on the surface of transmission and distribution lines, and how to de-ice and melt ice in the case of icing, is a global problem that needs to be solved by power system transmission and distribution professionals. [0003] With this technology, it is only necessary to install corresponding system devices and components at both ends of the existing transmission and distribution lines, and it is possible to prevent the surface of the transmission and distribution lines in operation from Icing, and deicing and melting can be achieved in the case o...

AI Technical Summary

Problems solved by technology

These methods all have the following defects and cannot be adapted to large-area applications:

[0007] 1). The method without load requires a power outage on the line. When a large-scale icing meteorological condition occurs, it is impossible to prevent the power grid from icing, deicing, and melting in an area.

[0008] 2). The traditional load-carrying method requires the cooperation of lines, loads, power sources and grid conditions to prevent icing, deicing, and ice melting. When large-scale icing weather conditions occur, it is even more impossible to prevent icing, deicing and melting of power grids in an area

This method requires the coordination of lines, loads, power sources, relay protection settings and grid conditions to prevent icing, deicing, and ice melting. When large-scale icing weather conditions occur, it is even more impossible to prevent icing, deicing and melting of power grids in an area

[0018] Due to the existence of these defects, power grid companies cannot adopt and put them into operation in large quantities. Therefore, power outages and collapses occur every year when transmission lines are covered with ice. When the large-scale ice and snow disaster occurred in 2008, large-scale The damage to the power grid and the long-term power outage in large areas have caused very great losses to the social and economic life of the people.

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