Judgment Method of Ice Covering Thickness of Transmission Lines in Ice Covered Area

Abstract

The invention discloses a judgment method of an icing thickness of an icing area electric transmission line. Based on collecting perennial historical meteorological data of a meteorological station, the judgment method of the icing thickness of the icing area electric transmission line includes summarizing meteorological and terrain feature law, structuring a meteorological model of relation between a surface feature lead wire icing thickness and meteorological elements, combining geographical and topographic feature elements to correct the model, computing icing thicknesses of areas of recurrence intervals of 30 years, 50 years and 100 years, and verifying and revising for the icing thicknesses according to operational experience. An ice distribution image which is mapped by adopting of the method can accurately reflect a distribution law of power grid icing thicknesses, can cover all areas, provides basis for power grid design, operating maintenance and technology improvement, and simultaneously has a guiding function for novel construction of areas without electric power facilities.

Description

technical field [0001] The invention relates to the technical field of power grid transmission and transformation lines, in particular to a method for judging the ice thickness of lines considering meteorological parameters, geographical elements, and terrain elements. Background technique [0002] Icing of power facilities has always been an important natural factor that threatens the safe and stable operation of the power grid. With the evolution of the global climate, abnormal phenomena such as El Nino phenomenon and La Nina phenomenon continue to appear, and the occurrence range, frequency and intensity of all kinds of extreme severe weather represented by icing in my country have shown a significant increase trend, causing harm to the operation of the power grid. It is also showing a rapid upward trend, and its consequences and impacts are also more serious. [0003] Accurately describe and divide the distribution of grid ice areas, and draw grid ice area distribution m...

AI Technical Summary

Problems solved by technology

Existing mapping methods use few sources of ice observation data and short accumulation time; insufficient consideration is given to altitude, atmospheric circulation, "micro-topography, and micro-meteorology"; the application of online grid ice monitoring technology has just started, and there are very few data; Different return periods are not considered, and power equipment with different voltage levels uses one map

Therefore, the existing ice area distribution map cannot fully reflect the actual situation on site, and it is inconvenient to use

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