Method and device for preventing ice coating in electric transmission line

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...

AI Technical Summary

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 conductor, forming ice, and there is also the aging problem of the coating

[0007] To sum up, the existing anti-icing technology generally has the problems of power outage, low safety, high energy consumption, long time consumption and large investment

So far, there is no safe, economical, reliable, effective and simple anti-icing method

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