Proposed overhead power transmission line icing monitoring method

Abstract

The invention discloses a proposed overhead power transmission line icing monitoring method, which comprises the steps that A, the wind speed V<wind>(m / s), weight reading T1(g)+T2(g) after a simulation wire being covered by ice, the length L<wire>(m) of the simulation wire, the diameter d<wire>(mm) of the simulation wire, the weight per unit length g<wire>(g / m) of the simulation wire, the ground height h<wire>(m) of the simulation wire, the actual icing thickness r<ice>(mm) of the simulation wire and a horizontal included angle theta (degree) between the wind direction and the simulation wire are acquired; B, the actual icing weight G<ice>(g) of the simulation wire is calculated through simultaneous formulas; and C, the standard ice thickness B0(mm) on the simulation wire is calculated according to a formula shown in the description of the invention. The proposed overhead power transmission line icing monitoring method can accurately measure the standard ice thickness on the simulation wire of a proposed overhead power transmission line, and can provide a reasonable and accurate ice region magnitude and other design meteorological conditions for power transmission line design.

Description

technical field [0001] The invention relates to the field of icing monitoring of conductors of overhead transmission lines, in particular to a method for monitoring icing of proposed overhead transmission lines. Background technique [0002] Under the current economic model, electricity, as the most important energy source to support economic development, has increasingly become the top priority in national economic construction. Due to the increase in electricity consumption year by year, the power transmission industry is becoming more and more remote and complicated. ; Especially the transmission channel is becoming more and more complex, and an important factor affecting the safety of transmission line operation is the problem of conductor icing. [0003] In high-altitude heavy and extra-heavy ice areas, the main meteorological factors that affect the magnitude of ice coverage are wind direction, wind speed, temperature, and humidity; while in high-altitude mountainous e...

AI Technical Summary

Problems solved by technology

[0004] At present, the understanding of the problem of icing on overhead transmission lines is far from meeting the requirements of power grid development. Because the problem of icing on conductors is very complicated, power design units have successively adopted artificial observation along planned transmission line corridors in areas prone to icing. The ice station method collects ice data, but the following problems exist in the establishment of artificial ice observation stations:

[0005] ①Constrained by the traffic environment and geographical conditions, the representativeness of the station layout is insufficient: manual observation can only choose some places with living conditions in winter, while most of the transmission lines are located in uninhabited areas, with complex micro-topography and heavy ice coverage, so winter observers cannot arrive

[0006] ②The cost of manual observation is high, and professional ice-covered observers are required to stay at the ice-observation station for a long time during the winter ice-covered period, and the cooperation of logistics and other relevant departments is also required;

[0007] ③The risk is high, because the ice viewing stations are often icy and snowy in winter, and there are few people and complex terrain, so safety accidents are often prone to occur

[0009] However, CN101701842A discloses a simulated wire real-time monitoring method for icing on overhead transmission lines without removing the influence of meteorological factors such as wind load, and the icing data obtained by it are quite different from the real icing data, and the measured icing thickness is inaccurate , if it is applied to the icing monitoring before the design of the proposed overhead transmission line, it will cause inaccurate division of the ice area in the design of the transmission line, increase the construction investment cost, and have a significant impact on the later safe operation and maintenance

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