Method and device for preventing ice coating in electric transmission line

A transmission line, anti-icing technology, applied in the installation of cables, overhead lines/cable equipment, overhead installation, etc., can solve the problems of large investment, aging coating, no anti-icing coating, etc.

Active Publication Date: 2010-02-24
STATE GRID CORP OF CHINA +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no material in the world that can prevent the formation of ice, and no anti-icing coatings for wires have been seen. The reason is that after the coating is applied to the wires, the coating is easy to crack, so no matter how good the hydrophobicity is After the coating has cracks, water is easily adsorbed on the c

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  • Method and device for preventing ice coating in electric transmission line
  • Method and device for preventing ice coating in electric transmission line
  • Method and device for preventing ice coating in electric transmission line

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Embodiment Construction

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0060] Refer to Fig. 1, which is a flowchart of a first embodiment of a method for preventing ice coating on a transmission line according to the present invention.

[0061] S101: Determine the critical non-icing current of the icing circuit.

[0062] Select the possible ice-coated lines through the ice-coated area from the power grid, and calculate the critical non-icing current of the possible ice-coated lines according to the selected line model, the number of splits and the meteorological conditions of the area where the line passes.

[0063] The line type, number of splits, and weather conditions in the passing area are different, the icing current of the line is different.

[0064] S102: Increase the working current of ...

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Abstract

The invention provides a method and a device for preventing ice coating in an electric transmission line. The method comprises the following steps: determining the critical non-ice-coating current ofan ice coating line; increasing the working current of the ice coating line by network reconstruction, reactive compensation and/or active pressure regulation sequentially and enabling the working current to be greater than the critical non-ice-coating current. The invention balances heat required by the ice coating of the line by enhancing the working current of the line through the heat of linepower loss generated by the working current, thereby destroying a formation condition of the ice coating and preventing the formation of the ice coating of the line. The invention also provides the device for preventing the ice coating in the electric transmission line. Before ice coating, the invention carries out defence and avoids the formation of the ice coating, thereby the large input of manpower and material resources after ice coating can be avoided, the cost is low, and the economic benefit is good; moreover, the invention can prevent ice coating without interrupting the operation ofthe electric transmission line, thereby the normal operation of the industrial and agricultural production can be ensured.

Description

Technical field [0001] The invention relates to the technical field of power transmission equipment control, in particular to a method and device for preventing ice coating on a power transmission line. Background technique [0002] Due to the global warming and the influence of the macroclimate, micro-topography and micro-meteorological conditions in our country, the icing disasters of my country's power grid have been intensified in recent years, and the impact of icing has been expanding, and the damage caused is more and more serious. In particular, in 2008, most parts of southern my country experienced extreme low temperature, rain, snow and freezing extreme weather, which was rare in history, which caused severe icing of power transmission and transformation equipment, tower collapse, disconnection and tripping of transmission lines, and large-scale power outages in some areas. . The snow disaster caused direct property losses of 10.45 billion yuan to the State Grid, and 39...

Claims

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Application Information

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IPC IPC(8): H02G7/00H02G7/16H02G1/02
Inventor 李晓明
Owner STATE GRID CORP OF CHINA
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